AET239 (1-11) Quizzes

Describe a MacPherson strut suspension.

A MacPherson strut suspension uses only one control arm and a strut assembly to support each wheel assembly. It is found on late model cars and may be used on both the front and rear wheels. It reduces the number of parts in the suspension system lowering the unsprung weight and smoothing the ride.

Technician A says an automotive suspension system supports the weight of the engine. Technician B says an automotive suspension system supports the weight of the transmission. Who is right?

Both A & B

Technician A says correct wheel alignment can improve an automobile's handling ability. Technician B says correct wheel alignment can improve an automobile's fuel economy. Who is right?

Both A & B

Technician A says stalling may occur while the engine is idling. Technician B says stalling may occur after cold starting. Who is right?

Both A & B

Technician A says when attempting to locate an engine performance problem, you should observe the engine's exhaust smoke. Technician B says when attempting to locate an engine performance problem, you should listen for any abnormal engine noises. Who is right?

Both A & B

How do you change camber?

It is changed by moving the control arm in or out without moving the ball joint forward or rearward. Shims or slots in the control arm mount and eccentric bolts are common methods for adjustment.

Why should a new cotter pin be used when assembling a wheel bearing?

It prevents the adjusting nut, bearings, hub, and front wheel from falling off.

Explain the difference between lateral runout and radial runout.

Lateral runout is side-to-side movement. Radial runout is caused by a difference in radius from the center axis of rotation.

What are the three methods for bleeding a vehicle brake system?

Manual, Pressure, Vacuum

Technician A tilts the top of a car's steering knuckle toward the rear of the car to adjust for "positive" camber. Technician B tilts the top of the tie-rod toward the front of the car to adjust for "positive" caster. Who is right?

Neither A Nor B

When pressing a ball bearing assembly in or out of the hub, what part of the bearing should contact the driving tool?

The bearing race press fits into the part

_____ is determined by the distance between the front and rear of the left- and right-hand wheels.

Toe

How do you adjust toe?

Toe is adjusted by lengthening or shortening the tie rods.

Excessive lug nut _____ can cause wheel or hub distortion.

Torque

A(n) _____ gauge is used to compare the distance between the front and rear of a vehicle's tires for toe alignment.

Tram

Technician A says an automatic transmission's valve body connects and disconnects the engine and transmission. Technician B says an automatic transmission's torque converter connects and disconnects the engine and transmission. Who is right?

B Only

Technician A says leaf springs are used in many late-model vehicles because they cannot break. Technician B says a spring compressor is not always required when replacing a rear coil spring. Who is right?

B Only

Technician A says most ring and pinion gears are classified as a hunting gearset. Technician B says most ring and pinion gearsets are nonhunting types. Who is right?

B Only

Technician A says only one planetary gearset is commonly used in an automatic transmission. Technician B says an automatic transmission commonly uses two or more planetary gearsets. Who is right?

B Only

Technician A says power steering gearbox ratios will be higher than manual steering gearbox ratios. Technician B says tie-rod assemblies are used in rack-and-pinion steering systems. Who is right?

B Only

Technician A says rear axle ratio is determined by comparing the number of teeth on the spider gears and the ring gear. Technician B says rear axle ratio is determined by comparing the number of teeth on the pinion drive gear and the ring gear. Who is right?

B Only

Technician A says screws are used to secure a rack-and-pinion steering system's rubber dust boots. Technician B says clamps are used to secure a rack-and-pinion steering system's rubber dust boots. Who is right?

B Only

Technician A says that screws are normally used to secure front drive axle CV joint boots. Technician B says that straps are normally used to secure front drive axle CV joint boots. Who is right?

B Only

Technician A says the alignment of the front wheels is changed when a tie-rod is changed. Technician B says that during steering wheel and air bag removal, it is recommended to keep the vehicle battery connected. Who is right?

B Only

Technician A says the term "torque multiplication" refers to the ability of a torque converter to increase the amount of engine torque applied to the transmission output shaft. Technician B says the term "torque multiplication" refers to the ability of a torque converter to increase the amount of engine torque applied to the transmission input shaft. Who is right?

B Only

Technician A says transaxles are used only on front-wheel-drive cars. Technician B says transaxles are used on front-wheel-drive cars and certain types of rear-engine cars. Who is right?

B Only

Technician A says when a manual transmission is in neutral, all of the synchronizer sleeves are located at the end of the countershaft. Technician B says when a manual transmission is in neutral, all of the synchronizer sleeves are located in the center of their hubs. Who is right?

B Only

The check valves in an automatic transmission are possibly malfunctioning. Technician A uses an ohmmeter to check the operation of these valves. Technician B performs an air test to check the operation of these valves. Who is right?

B Only

The lubricant in a limited-slip differential needs changing. Technician A tells the owner of the vehicle that all differential lubricant is the same. Technician B tells the owner of the car that certain limited-slip differentials require a special type of lubricant. Who is right?

B Only

The parts of a clutch assembly are being inspected and cleaned. Technician A says during this procedure you should clean the throw-out bearing in cleaning solvent. Technician B says during this procedure the throw-out bearing should be cleaned only with a shop rag. Who is right?

B Only

While discussing the operation of a modern automatic transmission's valve body, Technician A says a shift lever is used to control valve body action. Technician B says valve body operation is controlled by a shift lever and sensors. Who is right?

B Only

All of the following are basic components of a linkage steering system except:

Ball Sockets

What are the four main components of automatic transmission construction?

Bell housing, case, pan, and extension housing.

After hydraulic steering components have been serviced, the system should be ____.

Bled

A car has a hard starting problem. Technician A says the engine may have a faulty throttle position sensor. Technician B says this engine malfunction may be caused by a faulty coolant temperature sensor. Who is right?

Both A & B

A car is brought into the shop with excessive steering wheel play. Technician A checks for worn ball sockets. Technician B checks the condition of the system's idler arm. Who is right?

Both A & B

A clutch is being tested for slippage. Technician A says when performing this test, the emergency brake should be engaged. Technician B says when testing a clutch for slippage, the car's transmission should be placed in high gear. Who is right?

Both A & B

A customer brings an automobile into the shop with a rough ride complaint. Technician A looks for worn strut shock absorbers. Technician B checks the condition of the strut mounting nuts. Who is right?

Both A & B

A customer complains of a lubricant leak near the rear axle assembly. Technician A checks the housing's axle seals. Technician B checks to see if it is brake fluid. Who is right?

Both A & B

A customer complains that her automatic transaxle-equipped vehicle is making an odd noise. Technician A asks the customer to identify which gear or what conditions the noise is present. Technician B test-drives the car in all gears at different speeds. Who is right?

Both A & B

A customer complains that her vehicle's ride is very rough and the vehicle continues to rebound long after going over humps in the road. Technician A says that a bounce test is needed to check the shocks. Technician B says that a general inspection for worn suspension parts is also needed. Who is correct?

Both A & B

A customer wants to know what caused his/her car's ring and pinion gears to malfunction. Technician A says prolonged service may have caused this problem. Technician B says low differential lubricant level may have caused this problem. Who is right?

Both A & B

A customer wants to know what caused the car's CV joints to fail. Technician A says CV joints can fail after prolonged service. Technician B says CV joint failure an result from ruptured CV joint boots. Who is right?

Both A & B

A manual transaxle is noisy in second gear. Technician A checks the condition of the input second gear. Technician B inspects the condition of the output second gear. Who is right?

Both A & B

A manual transmission has a "clutch slippage" problem. Technician A says this condition may be caused by damaged clutch linkage. Technician B says this problem may be caused by a worn pressure plate. Who is right?

Both A & B

A manual transmission is hard to shift into gear. Technician A looks for a bent shift rod. Technician B checks the condition of the clutch. Who is right?

Both A & B

A rear axle must be removed from its housing. Technician A says a retainer plate may be used to hold this axle in its housing. Technician B says a C-clip may be used to hold this particular axle in its housing. Who is right?

Both A & B

A tripod type CV joint must be replaced. Before installing the new CV joint, Technician A inspects the axle shaft splines. Before installing the new CV joint, Technician B checks the condition of the axle shaft snap ring groove. Who is right?

Both A & B

An automatic transmission has shifting problems. Technician A says low fluid level can produce this problem. Technician B says high fluid level can produce this problem. Who is right?

Both A & B

An automobile has a "stiff" clutch pedal. Technician A says this problem can be caused by a faulty throw-out bearing. Technician B says this problem can be caused by a pressure plate malfunction. Who is right?

Both A & B

An automobile rear drive axle assembly needs to be road tested for diagnostic purposes. Technician A road tests the car on a smooth road surface. Technician B road tests the vehicle rounding corners. Who is right?

Both A & B

An automobile with a clutch "free play" problem is brought into the shop. Technician A checks clutch free play at the clutch fork. Technician B checks clutch free play at the clutch pedal. Who is right?

Both A & B

An automobile's manual transmission keeps "jumping out of gear." Technician A thinks the transmission's shift lever arms are not operating properly. Technician B looks for a worn clutch pilot bearing. Who is right?

Both A & B

Brass-colored particles are discovered in the case of a manual transmission during disassembly. Technician A checks the condition of the thrust washers. Technician B believes one or more synchronizers could be damaged. Who is right?

Both A & B

Certain parts in a manual transmission need to be replaced. Technician A says that to identify the particular transmission being serviced, you should look for an ID tag located on the transmission. Technician B says that to identify the type of transmission being serviced, you should look for a stamped set of numbers located on the transmission. Who is right?

Both A & B

Lubricant is leaking out of a manual transmission. Technician A says this problem may be caused by an excessive amount of oil in the transmission case. Technician B checks the condition of the converter gasket. Who is right?

Both A & B

Noise is coming from a car's rear drive axle assembly. Technician A checks for broken pinion gear teeth. Technician B inspects the condition of the ring gear. Who is right?

Both A & B

Technician A says "gear backlash" helps lubricate the rotating gears in the transmission. Technician B says "gear backlash" helps prevent gear damage during transmission operation. Who is right?

Both A & B

Technician A says a pitman arm is a component of a parallelogram linkage. Technician B says an idler arm is a component of a parallelogram linkage. Who is right?

Both A & B

Technician A says a rear drive axle assembly splits the amount of torque going to each wheel. Technician B says a rear drive axle assembly transfers torque through a 90° angle. Who is right?

Both A & B

Technician A says a torsion bar fastens to the vehicle's frame. Technician B says a torsion bar fastens to the suspension system control arm. Who is right?

Both A & B

Technician A says a transaxle is an automatic transmission and a differential combined in a single housing. Technician B says a transaxle is a manual transmission and a differential combined in a single housing. Who is right?

Both A & B

Technician A says bands are used in an automatic transmission to cause the gearsets to transfer power. Technician B says clutches are used in an automatic transmission to cause the gearsets to transfer power. Who is right?

Both A & B

Technician A says manual transaxle transmission's shafts are normally mounted in tapered roller bearings. Technician B says manual transaxle transmission's shafts are normally mounted in ball bearings. Who is right?

Both A & B

The bearings in a rear axle assembly need replacing. Before performing this task, Technician A checks the condition of all axle assembly parts. Before performing this task, Technician B wants to determine the cause of the original bearing failure. Who is right?

Both A & B

The clutch in a manual transmission vehicle is dragging. Technician A says that excessive clutch free travel can produce this problem. Technician B says that damaged transmission input shaft splines can cause this problem. Who is right?

Both A & B

The shop's service writer wants a clutch slippage problem diagnosed. Technician A checks for a broken motor mount. Technician B checks for a binding clutch linkage. Who is right?

Both A & B

Technician A says a torsion bar fastens to the vehicle's frame. Technician B says a torsion bar fastens to the suspension system control arm. Who is right?

Both A &B

How is the gear ratio calculated? Give an example.

Calculated by dividing the number of teeth on the driven gear by the number of teeth on the drive gear. If the driven gear has 32 teeth and the drive gear has 16 the gear ratio is 2:1.

Which of the following is a major part of a differential assembly?

Carrier

All of the following are common manual transmission problems, except:

Clogged Modulator Valve

Which of the following is not an adjustment related to an automatic transaxle?

Clutch Fork

Today's vehicles commonly use a(n) _____ steering column to help prevent driver injury during an accident.

Collapsible

Define the phrase "leaf spring windup."

Condition that causes the rearleaf springs to flex when driving or braking forces are applied to the suspension system.

A limited-slip differential usually uses 80W-90 gear oil as a lubricant.

False

Always reuse the old hub seal when replacing a front drive axle.

False

Solenoids and servos are friction devices that drive or lock planetary gearset members.

False

The purpose of the pinion gear is to transfer power from the ring gear to the axle.

False

Which of these parts is not found in a manual transaxle?

Fluid Coupling

How do you check the oil or lubricant level in automatic and manual transaxles?

For an automatic transaxle you should check it while the vehicle is running at operating temperature and the car in park. For a manual transaxle some recommend checking lubricant at room temperature and others say operating temperature.

Describe an integral-piston power steering system.

Has a hydraulic piston mounted inside the steering gearbox housing. Consist of power steering pump, hydraulic lines, and an integral power-assist gearbox.

A(n) _______ is a condition where the engine does not accelerate normally when the gas pedal is pressed.

Hesitation

A(n) _____ shows how the fluid passages inside an automatic transmission are connected to each component.

Hydraulic Circuit Diagram

Define the phrase "leaf spring windup."

Leaf spring windup is a condition that causes the rear leaf springs to flex when driving or braking forces are applied to the suspension system.

Summarize the general adjustment of an automatic transmission band.

Loosen the locknut and turn the adjustment screw on the side of the transmission case to the specified torque value. Back off the screw to provide band-to-drum clearance. Tighten the locknut to lock the setting.

A car's automatic transmission shifts too soon. Technician A looks for a faulty servo. Technician B suspects a faulty MAP sensor. Who is right?

Neither A Nor B

A manual transmission is being installed back into a vehicle. Technician A places a small amount of lubricant on the input shaft splines before installing the transmission. Technician B places a small amount of lubricant on the pressure plate release levers before installing the transmission. Who is right?

Neither A Nor B

A stall test is being performed on an automatic transmission. Technician A places the transmission in high gear during this test. Technician B places the transmission in neutral during this test. Who is right?

Neither A Nor B

An automobile is brought into the shop with "clutch pedal vibration." Technician A says pedal vibration may be due to improper clutch adjustment. Technician B says clutch pedal vibration is a normal operating condition of the clutch assembly. Who is right?

Neither A Nor B

An automobile's retainer plate-type axle needs replacing. Technician A begins this repair procedure by disassembling the differential carrier. Technician B begins this procedure by removing the spider gears. Who is right?

Neither A Nor B

Technician A says an automatic transmission's input shaft transfers power from the valve body to the gearsets. Technician B says an automatic transmission's input shaft transfers power from the gearsets to the drive shaft. Who is right?

Neither A Nor B

Technician A says the torque converter housing bolts to the rear of the transmission case. Technician B says the converter housing bolts to the front of the automatic transmission's extension housing. Who is right?

Neither A Nor B

A car's power steering belt is loose. Technician A says the belt may be worn and stretched and might require replacement. Technician B says the belt tensioner may be broken and unable to apply enough tension to the belt. Who is right?

Nether A Nor B

What components are normally included in a CV joint kit?

New joint components, grease, a boot, and boot straps.

A transmission rebuild kit costs $350 plus 7% tax. Labor for transmission removal, rebuilding, and installation is 7 hours at $95 per hour. What is the total cost of the repair?

None

Define the term dieseling.

Occurs when the engine fails to shut off.

All of the following are common engine performance problems except:

Oil Leak

Which of the following is not considered an automotive rear drive axle component?

Pilot Shaft

Which of the following is not a basic component of a modern automatic transmission?

Pinion Seals

Which of the following is not part of a front drive axle assembly?

Pivot Shaft

List and explain the four major parts found on a power rack-and-pinion steering system but not on a manual rack-and-pinion system.

Power cylinder is a hydraulic cylinder machined inside the rack or gear housing Power Piston is a hydraulic, double acting piston formed on the rack shaft Hydraulic lines are steel tubing connecting the control valve and the power cylinder Control valve is either a rotary valve or spool valve that regulates pressure entry into each end of the power cylinder

_____ tests are used to determine whether fluid pressure in the various circuits is normal.

Pressure

What major problem is a differential designed to prevent?

Prevents tires from sliding, squealing, and wear whenever the vehicle turns.

Name five functions of the steering system.

Provides precise control of the front wheel direction and sometimes the rear wheel direction Maintains the correct amount of effort needed to turn the wheels Transmits road feel to the driver's hands Absorbs most of the shock going to the steering wheel as tires hit bumps and potholes Allows for suspension action with minimal effect on the direction and alignment of the front wheels of the vehicle

Which of the following is another name for a torque converter impeller?

Pump

List the major parts of the hydraulic system in an automatic transmission.

Pump, pressure regulator valve, manual valve, solenoids, shift valves, servos, pistons, and valve body

Why is an overdrive ratio used?

Results when a larger gear drives a smaller gear. The speed of the output gear increases, but torque drops.

The wheel speed sensors produce ac _____ that correspond to wheel and tire speed.

Signals

Define the term road feel.

Slight steering wheel pull caused by road surface irregularities.

What are three typical symptoms of automatic transaxle problems?

Slipping in a gear, abnormal noises, and fluid leaks

All of the following are other names for a limited-slip differential, except:

Spin-Free

What happens with spring fatigue?

Spring fatigue makes the vehicle settle towards the axles and lowers the vehicle's ride height. This changes the position of the control arms, resulting in misaligned wheels.

All of the following may cause an engine to surge except:

Starter Solenoid Problem

A(n) _____ is a listening device that can be used to isolate differential and axle noises.

Stethoscope

Which of the following is not a component of an automatic transaxle?

Synchronizers

What is the advantage of gas-charged shocks?

The gas maintains constant pressure on the oil to stop air bubbles from forming.

Describe the movement of a planetary gearset

The planet gears revolve around the sun gear and the gears are always in mesh.

If a transmission is only noisy in second gear, what does that tell you about the problem?

The problem is only related to components to that specific gear.

List three functions of camber.

To prevent tire wear on the outer or inner tread, to load the larger inner wheel bearing, to aid in steering by placing vehicle weight on the inner end of the spindle.

A(n) _____ is a fluid clutch that provides a means of coupling and uncoupling the engine from the transmission.

Torque Converter

List the eight major parts of an automatic transmission. Explain the function of each.

Torque converter: A fluid coupling that connects and disconnects the engine crankshaft and transmission. Input Shaft: Transfers power from the torque converter to the internal drive members and gearsets. Transmission Oil Pump: Produces pressure to operate the hydraulic components in the transmission. Valve Body: An electro-hydraulic assembly that routes fluid pressure to specific hydraulic pistons and servos to hold or release different planetary gearsets. Pistons and servos: Actuate bands and clutches in the automatic transmission case that engage different planetary gearsets. Planetary Gearsets: Provide different gear ratios and reverse gear. Bands and Clutches: Apply clamping pressure on different parts of the planetary gearsets to operate them. Output Shaft: Transfers engine torque from the gearsets to the drive shaft.

In a modern transmission, this device senses engine load and other variables to determine when the transmission should shift to a higher gear.

Transmission Control Module

A(n) _____ is commonly used to secure a transmission during removal.

Transmission Jack

Summarize the differences in design between transaxles for transverse mounted engines and longitudinally mounted engines.

Transverse engines means that the engine is sideways. The crankshaft centerline points at both drive wheels. The transaxle bolts to the rear of the engine. Longitudinal engines mean they are lengthwise. The crankshaft centerline points toward the front and rear of the vehicle. The transaxle use a more conventional differential with helical ring and pinion gears.

A vacuum leak is a common cause of rough idling.

True

An integral carrier is constructed as part of the axle housing.

True

Engine vacuum leaks can affect automatic transmission operation.

True

Excess ring and pinion backlash can cause a "clunk" sound when the transmission is placed in drive.

True

Most technicians install rebuilt or new power steering pumps rather than overhauling the defective unit in the shop.

True

Swing axles are found on a differential that is rigidly mounted on the auto frame.

True

Torque multiplication occurs when the impeller is spinning faster than the turbine.

True

Steering system noise can be caused by all of the following problems except:

Unlubricated Ball Sockets

The _____ weight of a car is the weight of the parts not supported by the springs.

Unsprung

How does electronic steering assist work?

Uses a small electric motor to help move the rack and pinion gearbox. Acts directly on the steering rack or steering column shaft.

How do you use a systematic approach to troubleshooting?

Using your knowledge of automotive systems and a logical process of elimination to find the source of a problem.

All of the following problems can cause a manual transmission to "lock in gear", except:

Valve Body Malfunction

A(n) _____ is commonly needed to force a steering wheel off of its shaft.

Wheel Puller

In addition to the brake warning light in the instrument cluster and the sensor trigger wheels, list and describe the four major parts of an anti-lock brake system.

Wheel speed sensors, an ABS control module, an electro-hydraulic brake actuator, and conventional hydraulic brake circuits. Evaluate descriptions individually.

How do you do a "dry park test" of a steering system?

With the full weight of the vehicle on the wheels, ask someone to rock the steering wheel back and forth. You can also check by wiggling one of the tires when lifted to check for play or looseness.

List and explain the eleven major parts of a strut assembly.

strut shock absorber, dust shield, lower spring seat, coil spring, upper spring seat, strut bearing, rubber bumpers, rubber isolators, upper strut retainer, strut rod nut, damper unit.

A new electric rack-and-pinion steering system is needed to repair a badly worn and leaking system. The new rack assembly costs $345 with 7% tax to be included. The labor time is 3.5 hours at $75 per hour. What is the total cost of the repair?

$631.65

Identify four functions of a manual transmission in proper operating condition.

-Be able to increase torque going to the drive wheels for quick acceleration -Supply different gear ratios to match different engine load conditions -Have a reverse gear for moving backwards -Provide the driver with an easy means of shifting transmission gears

A "buzzing" sound is coming from an automobile's power steering system when the wheel is turned. Technician A tells the owner of the vehicle that this problem may be the result of a damaged pitman arm. Technician B tells the owner of the vehicle that this problem may be caused by air in the power steering system. Who is right?

A Only

A clutch is being tested for slippage. Technician A says you shouldn't let the clutch slip for more than one or two seconds during this test. Technician B says you shouldn't let the clutch slip for more than ten to fifteen seconds during this test. Who is right?

A Only

A humming sound is coming from a car's rear axle's carrier when driving straight ahead. Technician A wants to replace the carrier bearings. Technician B wants to replace the spider gears. Who is right?

A Only

A manual transmission's shafts are being checked for runout. Technician A is going to use a dial indicator to perform this task. Technician B is going to use an inside micrometer to perform this task. Who is right?

A Only

A rear axle is leaking lubricant. Technician A checks the pinion gear seal. Technician B checks the drive shaft slip yoke seal. Who is right?

A Only

A whining noise is coming from a car's differential case when driving straight. Technician A inspects the ring and pinion gear for problems. Technician B replaces the axle shims. Who is right?

A Only

An automatic transmission has burned fluid and a slippage problem. Technician A believes serious transmission damage is indicated. Technician B thinks this condition requires simple band adjustment. Who is right?

A Only

An automatic transmission is producing an abnormal sound in all gears. Technician A checks the transmission's fluid pump for problems. Technician B inspects the transmission's reverse shift fork. Who is right?

A Only

An automatic transmission's fluid level needs to be checked. Technician A checks the transmission's fluid level at operating temperature with the engine running in Neutral. Technician B checks the transmission's fluid level when the fluid is cool with the engine off and in Neutral. Who is right?

A Only

An automobile has a metal-on-metal grinding sound when the brakes are applied. Technician A inspects the brake linings. Technician B looks for a leaking wheel cylinder. Who is right?

A Only

An automobile is brought into the shop with an automatic transmission "slippage" problem. Technician A checks the transmission's fluid level. Technician B inspects the condition of the transmission's valve body first. Who is right?

A Only

An automobile's manual transmission is noisy in all gears. Technician A looks for a damaged transmission shaft. Technician B checks the condition of the first output gear. Who is right?

A Only

An automobile's power steering pump is not operating properly. Technician A performs a power steering pressure test to check the operation of the power steering pump. Technician B says a power steering pressure test will not detect power steering pump malfunctions. Who is right?

A Only

An automobile's steering column needs servicing. Technician A tells the owner of the car that most steering columns can be repaired with the column mounted in the car. Technician B tells the owner of the car that most steering columns must be removed from the vehicle when service is required. Who is right?

A Only

An automotive power steering system's fluid level needs to be checked. Technician A checks the steering system's fluid level with the engine off. Technician B checks the fluid level while the engine is running. Who is right?

A Only

Noise is coming from a car's differential case in turns. Technician A looks for damaged spider gears. Technician B inspects the condition of the axle mounting plates. Who is right?

A Only

Technician A says "gear reduction" is common in the lower gears of a manual transmission. Technician B says "gear reduction" is common in the high gear of a manual transmission. Who is right?

A Only

Technician A says a differential's pinion gear is normally mounted on tapered roller bearings. Technician B says a differential's pinion gear is normally mounted on the differential case. Who is right?

A Only

Technician A says a planetary gearset will act as a solid unit when two of its members are held. Technician B says a planetary gearset will act as a solid unit when one of its members is held. Who is right?

A Only

Technician A says an automotive ignition switch is usually bolted to the steering column. Technician B says special clamps are normally used to secure an automotive ignition switch to the steering column. Who is right?

A Only

Technician A says cars equipped with a transaxle can use either a manual transmission or automatic transmission. Technician B says cars equipped with a transaxle can only use manual transmissions. Who is right?

A Only

Technician A says modern differential ring and pinion gears are hypoid type. Technician B says modern differential ring and pinion gears are classified as a spiral bevel gearset. Who is right?

A Only

Technician A says one of the functions of an automotive steering system is to transmit "road feel" to the driver's hands. Technician B says one of the functions of a steering system is to prevent excessive "body squat." Who is right?

A Only

Technician A says one of the main functions of wheel alignment is to make the tires roll without slipping under all operating conditions. Technician B says one of the main functions of wheel alignment is to adjust for badly worn steering parts. Who is right?

A Only

Technician A says that power steering systems are not susceptible to "hard steering" problems. Technician B says that accurately diagnosing an electronic assist steering system requires a scan tool or diagnostic tablet. Who is right?

A Only

Technician A says the oil pump in an automatic transmission is used to produce pressure to operate the transmission's hydraulic components. Technician B says an automatic transmission's oil pump is used to lubricate the transmission counter gears. Who is right?

A Only

Technician A says vapor is one of the basic states of matter. Technician B says a molecule is one of the basic states of matter. Who is right?

A Only

While discussing the construction of a modern automatic transmission, Technician A says the input and output shafts are the main shafts in the type of transmission. Technician B says the counter shaft and output shaft are the main shafts in an automatic transmission. Who is right?

A Only

Define the term gearbox ratio.

A comparison between steering wheel rotation and sector shaft rotation. It is also termed steering ratio or steering gear reduction. Steering gearbox ratios rage from 15:1 to 24:1.

Describe ring and pinion noise.

A howling and whining noise that changes when going from acceleration to deceleration

Explain the two methods commonly used to hold a rear drive axle in its housing.

A retainer plate type axle is commonly used with a removable carrier. Procedure: Support car on jack stands, unbolt the rear wheel and slide off brake drum... A C-clip type axle is frequently used with an integral carrier. Procedure: Drain axle lubricant, unbolt the cover on the rear of the axle housing...

What is a servo?

A servo is an apply piston that operates the automatic transmission bands.

How do you check for ball joint wear?

A worn ball joint might make a clunking or popping sound when turning or when driving over a bump. Measure the play. With a ball joint indicator inspect the shoulder on the joint. Another way is to jack up the vehicle and try to physically move the control arm and joint.

Approximate manual transmission gear ratios are [A] for first, [B] for second, [C] for high, and [D] for reverse.

A: 3:1 B: 2:1 C: 1:1 D: 3:1

Rear axle ratio is determined by comparing the number of teeth on the [A] gear to the number of teeth on the [B] gear.

A: Ring B: Pinion

A(n) [A] system has fewer steering parts to fail compared to a(n) [B] system.

A: Worm Bearing Preload B: Over-Center Clearance

What are three typical symptoms of manual transaxle problems?

Abnormal bearing and gear noises, shifting problems, and fluid leaks.

List several symptoms of common suspension system problems.

Abnormal noises, tire wear, steering wheel pull, and front end shimmy.

What is the potential danger of spinning a bearing with compressed air?

Air pressure can make the bearing whirl at high speeds then the bearing can explode and fly apart with lethal force.

Which of the following can cause automatic transmission slippage?

All Of The Above

Which of the following components can wear and cause play in the steering system?

All Of The Above

All of the following are functions of an automotive suspension system, except:

Allows the body to tilt when heavily loaded

A car equipped with manual rack-and-pinion steering is brought into the shop with excessive steering wheel play. Technician A adjusts the steering gear. Technician B adjusts the idler arm. Who is right?

B Only

A car is brought into the shop with a worn clutch. Technician A tells the owner of the car that highway driving will wear out a clutch faster than city driving. Technician B tells the owner that city driving wears out a clutch faster than highway driving. Who is right?

B Only

A car's curb weight is being measured. Technician A checks curb weight with the automobile's gas tank empty. Technician B checks curb weight with the automobile's gas tank full. Who is right?

B Only

A car's manual transaxle produces a noise in every gear. Technician A inspects the condition of the valve body. Technician B checks the condition of the transaxle's shaft bearings. Who is right?

B Only

A car's steering wheel turns three inches before causing movement of the front wheels. Technician A tells the owner of the vehicle that this indicates normal play in the steering system. Technician B tells the owner of the vehicle that this indicates excessive steering wheel play. Who is right?

B Only

A manual transmission's input shaft and clutch disc wobble up and down. Technician A says this problem is probably the result of a damaged clutch housing cover. Technician B says this problem is probably the result of a worn pilot bearing. Who is right?

B Only

A press-fit rear axle bearing must be removed and replaced. Technician A wants to use a cutting torch to remove the bearing. Technician B wants to use a grinder, chisel, and hydraulic press to remove this bearing. Who is right?

B Only

A small pickup truck is brought into the shop with a leaking shop absorber. Technician A says the leaking shock will produce a high-pitch screeching noise when the vehicle is driven. Technician B says that the leaking shock must be replaced. Who is right?

B Only

A vehicle's body bounces five times after a "shock bounce test" is performed. Technician A says this indicates that the shocks are in good condition. Technician B says the results of this test indicate bad shock absorbers. Who is right?

B Only

An automatic transmission's fluid has a "milky" color. Technician A checks to see if engine oil is leaking into the transmission. Technician B checks to see if engine coolant is leaking into one of the transmission lines. Who is right?

B Only

An automobile's ball joints have been replaced. After performing this procedure, Technician A says the vehicle should be road tested before further adjustments are made. Technician B says the vehicle's wheel alignment should be checked before the vehicle is road tested. Who is right?

B Only

An automobile's clutch has too much "free play." Technician A says this problem can cause clutch slippage. Technician B says this problem can cause clutch dragging. Who is right?

B Only

Pressure tests are being performed on an automatic transmission. Technician A inserts the pressure gauge in the ports located on the outside of the torque converter to perform these tests. Technician B inserts the pressure gauge in the ports located on the outside of the transmission case to perform these tests. Who is right?

B Only

Technician A adjusts a car's toe angle by lengthening or shortening the steering knuckle. Technician B adjusts a car's toe angle by lengthening or shortening the tie-rods. Who is right?

B Only

Technician A is using compressed air to remove clutch dust from a clutch disc. Technician B is using an enclosed vacuum to remove clutch dust from a clutch disc. Who is right?

B Only

Technician A says "worm gear" steering systems are used on most modern automobiles. Technician B says rack-and-pinion steering systems are used on most late-model automobiles. Who is right?

B Only

Technician A says a 1:1 gear ratio is generally used for a manual transmission in first gear. Technician B says a 3:1 gear ratio is generally used for a manual transmission in first gear. Who is right?

B Only

Technician A says a Woodruff key is used to lock the steering wheel to the steering shaft. Technician B says splines are used to lock the steering wheel to the steering shaft. Who is right?

B Only

Technician A says a differential's ring and pinion drive gears are never manufactured as a matched set. Technician B says a differential's ring and pinion gears are commonly manufactured as a matched set. Who is right?

B Only

Technician A says a gear ratio of 10:1 is smaller than a gear ratio of 5:1. Technician B says a gear ratio of 10:1 is larger than a 5:1 gear ratio. Who is right?

B Only

Technician A says a hunting gearset meshes the same gear teeth over and over during operation. Technician B says a hunting gearset does not mesh the same gear teeth during operation. Who is right?

B Only

Technician A says a manual transaxle transmission is always driven by a drive shaft powered by the engine's crankshaft. Technician B says a manual transaxle transmission is sometimes driven by a chain link powered by the engine's crankshaft. Who is right?

B Only

Technician A says a manual transmission normally bolts to the engine's torque converter. Technician B says a manual transmission normally bolts to the automobile's clutch housing. Who is right?

B Only

Technician A says a steel mesh collapsible steering column is a one-piece unit. Technician B says a steel mesh collapsible steering column is a two-piece unit. Who is right?

B Only

Technician A says an automatic transmission's oil pan is located at the bottom of the extension housing. Technician B says an automatic transmission's oil pan fits over the valve body. Who is right?

B Only

List twelve service rules for differentials.

1. Check for markings before dissasembly 2. Clean all parts carefully then inspect them for wear and damage 3. Use a holding fixture for the differential, if available 4. Rotate the pinion and case bearings by hand while checking for roughness 5. If the pinion gear has a collapsible spacer always replace it 6. Coat the outside of all seals with nonhardening sealer. Lubricate the seal's inside surface 7. When tightening the pinion yoke nut, clamp the yoke in a vise or use a special holding bar 8. Replace the ring and pinion gears as a set 9. Torque all fasteners to specs 10. Use new gaskets and approves sealer 11. Align all markings during reassembly 12. Differential designs and repair procedures vary. Special tools and methods are frequently needed

List four points to consider when diagnosing bearing failures.

1. Check the general condition of all parts during disassembly 2. Compare the failure to any information in the service manual and own knowledge 3. Determine cause of the part failure 4. Make all repairs following manufacturer's recommendations and specs

List six possible advantages of a front-wheel-drive vehicle with a transaxle over a rear-wheel-drive vehicle with a transaxle.

1. Reduced drive train weight and improved efficiency 2. Improved traction on slippery pavement because of more weight on the drive wheels 3. increased passenger compartment space 4. Smoother ride because of less unsprung weight 5. Quieter operation because engine and drive train noise is centrally located in the engine compartment 6. Improved safety because of increased mass in front of passengers

Power steering pump pressure can exceed:

1000psi(6895kPa)

List and explain the six major parts of a suspension system.

Control Arm: Is a movable lever that fastens the steering knuckle to the vehicle's body or frame. Steering Knuckle: Provides a spindle or bearing support for the wheel hub, bearings, and wheel assembly. Ball Joint: Is a movable connection that allows the control arm to move up and down while allowing the steering knuckle to swivel from side to side. Suspension Spring: Supports the weight of the vehicle and permit the control arm and wheel to move up and down. Shock Absorber/Damper: Helps keep the suspension from continuing to bounce after spring compression and extension. Control Arm Bushing: A sleeve that allows the control arm to swing up and down on the frame.

Name the five types of air conditioning compressors.

Crank, Axial, Radial, Rotary, Scroll

Define the terms curb height and curb weight.

Curb Height: The distance from a specific point on the vehicle to the ground. Curb Weight: The weight of the vehicle with a full tank of gas with no luggage or passengers.

If you have difficulty locating an engine performance problem, refer to a factory _________, which lists problem causes and corrections.

Diagnosis Chart

All of the following are basic functions of an automotive manual transmission, except:

Distribute torque between front and rear drive shafts

List ten steps you should carefully follow when changing the oil and filter on an automatic transmission.

Drain the fluid from the transmission pan. Drain the torque converter, if necessary. Remove the pan. Inspect the pan for debris. Clean the pan. Change the filter. Apply sealer sparingly on the pan. Install the pan. Fill the transmission with fluid. Start the engine, shift the transmission through its gears, and check for leaks.

Which of the following is not a type of wheel balancer?

Dynamic Wheel Balancer

_____ suspension allows one wheel to move up and down with minimum effect on the other wheels.

Independent

What are four categories of transmission gears? Explain the function of each.

Input gear drives the forward gear on the countershaft gear. Countershaft gear turns the gears on the output shaft. A reverse idler gear assembly changes the direction of gear rotation so the vehicle can be moved in reverse. The output shaft gears transfer rotation from the countershaft gears to the output shaft.

How does the thermostatic expansion valve A/C system control outlet temperature?

It Opens And Closes To Meter The Right Amount Of Refrigerant Into The Evaporator

How does an air conditioning compressor turn on and off?

It Uses A Magnetic Clutch

Explain how a continuously variable transaxle can increase fuel economy.

It can increase fuel economy because a CVT keeps the engine at its most efficient operating speed at all times. The engine does not have to accelerate through each gear, a relatively constant engine speed is maintained.

What is an alignment console?

It consist of a color monitor, keypad, and computer, all mounted in a roll-around cabinet.

What is an alignment rack?

It consist of ramps, turning radius gauges, and one of several kinds of equipment for measuring alignment angles.

How is a dummy shaft used during transmission disassembly?

It drives out the countershaft and reverse idler shaft.

What is the purpose of shifting the transmission into high gear before installation?

It helps position the input shaft into the clutch disc during transmission installation.

What is gear backlash?

It is the small clearance between the meshing gear teeth.

Explain the operation of a clutch apply piston.

It slides back and forth inside the clutch drum to clamp the driving discs and the driven discs together. Seals fit on the piston to prevent fluid leakage during clutch application.

Cleaning hydraulic brake system parts in cold soak solvent is recommended.

False

A car is towed into a shop with a no-start problem. The engine cranks but will not fire and run on its own power. The car has a throttle body, fuel injected gasoline engine. Technician A says to check for spark and fuel first. Technician B says that the spark plugs should be removed first. Who is right?

A Only

An automobile has a steering wheel pull problem. Technician A checks to see if the tires are inflated evenly. Technician B checks for loose shock absorbers. Who is right?

A Only

An automotive engine won't start. Technician A says you should first look in the engine compartment for obvious signs of trouble. Technician B says an exhaust gas analyzer should be used first to diagnose the engine problem. Who is right?

A Only

Brake dust has accumulated on an automobile's wheel brake assemblies. Technician A uses a brake vacuum machine to remove this dust. Technician B uses compressed air to remove this dust. Who is right?

A Only

Technician A normally adjusts a car's positive camber setting at about 1/4° to 1/2°. Technician B normally adjusts a car's positive camber setting at about 3° to 4°. Who is right?

A Only

Technician A says "conduction" is heat transfer through objects that are touching each other. Technician B says "conduction" is heat transfer caused by the air surrounding objects. Who is right?

A Only

Technician A says "toe-in" is produced when the front of the wheels are closer together than the rear of the wheels. Technician B says "toe-in" is produced when the front of the wheels are farther apart than the rear of the wheels. Who is right?

A Only

Technician A says a coil spring is the most common spring used on modern automotive suspension systems. Technician B says a leaf spring is the most common spring used on modern automotive suspension systems. Who is right?

A Only

Technician A says a scan tool will usually test the action of major ABS components by energizing them. Technician B says that a scan tool does not have this capability. Who is correct?

A Only

Technician A says an automotive suspension system works with the steering system to help keep the wheels in correct alignment. Technician B says an automotive suspension system works independently of the steering system and has no effect on wheel alignment. Who is right?

A Only

Technician A says heat always transfers from a hotter object to a colder object. Technician B says heat always transfers from a colder object to a hotter object. Who is right?

A Only

Technician A says one of the purposes of caster is to aid directional control of the vehicle. Technician B says one of the purposes of caster is to load the larger inner wheel bearing. Who is right?

A Only

Technician A says that in an independent suspension system, movement of one wheel does not cause direct movement of the wheel on the opposite side of the vehicle. Technician B says that in a nonindependent suspension system, movement of one wheel does not cause direct movement of the other wheel on the opposite side of the vehicle. Who is right?

A Only

Technician A says that you must set the sensor air gap on some vehicles. Technician B says that the air gap between the sensor and trigger wheel needs to be increased each year the vehicle is in service. Who is correct?

A Only

Technician A says the control arm bushing allows the suspension system control arm to swing up and down on the vehicle frame. Technician B says the control arm bushing allows the control arm to move from side to side on the suspension system damper. Who is right?

A Only

The outer corners of a tire's tread are worn. Technician A checks to see if the tire is underinflated. Technician B says an underinflated tire will not produce this type of wear problem. Who is right?

A Only

Vibration is coming from a car's center and rear. Technician A checks the condition of the rear tires. Technician B checks the front ball joints. Who is right?

A Only

Summarize the use of a caster-camber gauge.

A caster-camber gauge is used with the turning radius gauge to measure caster and camber in degrees.

Define the term misfiring.

A performance problem resulting from one or more cylinders failing to fire normally or at all.

What causes "backfiring?"

Air-fuel mixture igniting in the intake manifold or the exhaust system.

A(n) _____ system prevents wheel lockup during hard braking.

Anti-Lock Brake

A fuel injected engine misses and emits heavy black smoke. Technician A says this problem normally indicates an emission control system malfunction. Technician B says this problem may indicate a faulty engine temperature sensor. Who is right?

B Only

A vacuum leak is detected in an automotive engine. Technician A says the leak will produce a banging sound at low engine rpms. Technician B says an intake manifold vacuum leak will make the engine run rough and increase idle rmps. Who is right?

B Only

An automobile has a spongy brake pedal. Technician A checks to see if the brake pad linings are too thin compared to specs. Technician B bleeds the brake system. Who is right?

B Only

An engine is brought into the shop with a dieseling problem. Technician A says this may be caused by a high octane fuel. Technician B says this may be the result of an overheated engine. Who is right?

B Only

Bulges are discovered on an automobile's front tires. Technician A immediately replaces the tires. Technician B is not going to replace the tires until after determining the cause of the tire damage. Who is right?

B Only

Technician A says "condensation" occurs when liquid changes back into a vapor. Technician B says "condensation" occurs when a vapor changes back into a liquid. Who is right?

B Only

Technician A says an independent suspension system has both the right and left wheels attached to the same solid axle. Technician B says a nonindependent suspension system has both the right and left wheels attached to the same solid axle. Who is right?

B Only

Technician A says cars with manual steering have more "negative" caster than cars with power steering. Technician B says cars with power steering have more "negative" caster than cars with manual steering. Who is right?

B Only

Technician A says engine hesitation is normally caused by a temporarily rich air-fuel mixture. Technician B says engine hesitation is usually caused by a temporarily lean air-fuel mixture. Who is right?

B Only

An engine is brought into the shop with a misfire problem. Technician A says to use a scan tool to find out which cylinders are misfiring. Technician B says to suspect the spark plug ignition coil, and the high voltage conductor before checking cylinder compression. Who is right?

Both A & B

A car has a low brake pedal problem. Technician A inspects the brake adjusters. Technician B looks for a maladjusted master cylinder push rod. Who is right?

Both A & B

A car is brought in with a noise coming from the right front tire. Technician A checks the tire's tread. Technician B looks for a worn wheel bearing. Who is right?

Both A & B

A car is brought into the shop with a tire vibration problem. Technician A looks for ply separation. Technician B checks to see if the wheel is damaged. Who is right?

Both A & B

A car's front tires are worn excessively. Technician A checks the car's front-wheel alignment. Technician B checks the tire's inflation pressure. Who is right?

Both A & B

A car's steering wheel does not return to the straight-ahead position after turning. Technician A adjusts the automobile's caster angle. Technician B says the car's caster angle has nothing to do with this problem. Who is right?

Both A & B

A scan tool shows a problem with the modulator pump motor. Technician A says to check for power to the motor from the ABS control module. Technician B says if no power is reaching the motor to check the wiring between the control module and the motor. Who is correct?

Both A & B

An automobile engine has a misfire problem. Technician A says type A misfires are severe enough to cause catalytic converter damage. Technician B says that "rpm at misfire" and "load at misfire" are misfire data produced by a scan tool when connected to the OBD II diagnostic link. Who is right?

Both A & B

An automotive engine has a no-start problem. Technician A says this condition may indicate an ignition system malfunction. Technician B says this problem may indicate a fuel system problem. Who is right?

Both A & B

An automotive engine has a stalling problem. Technician A says this problem may be due to a low idle speed setting. Technician B says this problem may be due to a severe engine vacuum leak. Who is right?

Both A & B

An engine has poor fuel economy. Technician A says this problem may be the result of a leaky fuel line. Technician B says this problem may be caused by a rich air-fuel mixture. Who is right?

Both A & B

Technician A says a rear-wheel-drive car's toe-in setting should be 1/16" to 1/4". Technician B says a rear-wheel-drive car's toe-in setting should be 1.6 mm to 6 mm. Who is right?

Both A & B

How much fluid should typically be in a master cylinder?

Brake Fluid Level Should Be 1/4"(6m) from the top of the reservoir

Which of the following cannot be checked with a scan tool?

Break Lining Condition

_____ is the forward or rearward tilt of the steering knuckle or steering support when viewed from the side of the vehicle.

Caster

The most common type of suspension system spring is the ______ spring.

Coil

A metal ball peen hammer should be used to install wheel covers.

False

A strut rod is used to keep the steering knuckle from swiveling.

False

Vapor lock occurs when the gasoline is cooled and forms a gel, preventing fuel flow and engine operation.

False

A(n) _______ or ________ is a metallic tapping or light knocking sound that usually occurs when the engine accelerates under load.

Pinging; Spark Knock

Explain the difference between positive and negative camber.

Positive camber the tops of the wheels tilt outward when viewed from the front of the vehicle. Negative camber the tops of the wheels tilt inward when viewed from the front.