AUT 178 Final Questions Study Set
Which of the following gear ratios shows an overdrive condition? 0.85:1 1:1 2.15:1 none of these answers is correct
0.85:1
Which of the following gear ratios generates the highest torque or power output? 0.85:1 2.67:1 5.23:1 11.12:1
11.12:1
The reverse lockout system prevents shifting the transmission into reverse when the vehicle speed exceeds ______ mph. 5 12 25 40
12
Technician A says an overdrive gear ratio is less than 1 to 1. Technician B says overdrive ratios provide more torque than underdrive ratios. Who is correct?
A only
Technician A says in a conventional transmission, the speed gears freewheel around the mainshaft until they are locked to it by the synchronizer. Technician B says when not engaged, speed gears slide away from the counter gears until they are no longer in mesh. Who is correct?
A only
Technician A says the engine flywheel is the main driving member of the clutch. Technician B says the transmission input shaft receives driving motion from the pilot bearing. Who is correct?
A only
Technician A says the speeds at which two meshed gears turn depend on the number of teeth on each gear. Technician B says if the driving gear has fewer teeth than the driven gear, the speed of the driven gear increases. Who is correct?
A only
Technician A says when a small gear drives a larger gear, output speed is decreased. Technician B says when a small gear drives a larger gear, output torque is decreased. Who is correct?
A only
While discussing the shift linkage of a typical five-speed transmission, Technician A says three shift rails are needed. Technician B says only the center shift rail is machined with interlock and detent notches. Who is correct?
A only
Hydraulic clutch systems are being discussed. Technician A says the clutch master cylinder will normally need about 1 oz. of fluid a year. Technician B says if the master cylinder is less than full, there is probably a leak in the system. Who is correct?
B Only
Helical gears are being discussed. Technician A says helical gears are used in modern transmissions because they don't produce axial thrust. Technician B says in a helical gearset two or more teeth mesh at the same time, which distributes tooth load and produces a very strong gear. Who is correct?
B only
Self-shifting manual transmissions are being discussed. Technician A says these transmissions use planetary gearsets and torque converters like conventional automatic transmissions. Technician B says these transmissions are manual transmissions that shift gears using a computer-controlled actuator connected to the shift forks and a clutch actuator. Who is correct?
B only
Technician A says helical cut gears have teeth cut at a 90-degree angle to the side of the gear. Technician B says helical gears run without creating gear whine. Who is correct?
B only
Technician A says the clutch fork moves the pilot bearing. Technician B says the clutch fork movement is controlled by the clutch pedal. Who is correct?
B only
Technician A says the transmission allows the driven wheels to spin faster than the engine. Technician B says the transmission multiplies the torque produced by the engine. Who is correct?
B only
Technician A uses compressed air to clean off asbestos dust from the clutch. Technician B uses an approved liquid cleaning system. Who is correct?
B only
Which of the following components is NOT part of a clutch disc? torsional damper coil spring cushion [marcel] spring Belleville spring hub flange
Belleville spring
____________________ fluid is often used as the hydraulic fluid in hydraulic clutch systems.
Brake
Which of the following statements concerning dual-mass flywheels is NOT true. Dual-mass flywheels are used to reduce vibrations transmitted through the transmission The rotation of the two flywheel plates can differ by as much as 360 degrees Dual-mass flywheels are only used on heavy trucks Dual-mass flywheels provide for smoother shifting, and reduce gear noise
Dual-mass flywheels are only used on heavy trucks
Blocking rings are typically made from aluminum and are part of a typical synchronizer assembly.
False
Chatter is a shuddering felt in the vehicle when the pressure plate releases the clutch disc. True False
False
Coil spring-type pressure plates require less pedal effort than diaphragm-type pressure plates. True False
False
Most hydraulic clutch release systems should be adjusted once a year. True False
False
Most transaxles require a pilot bearing in the flywheel to support the input shaft. True False
False
Shaft and lever clutch linkage are used on most modern passenger cars. True False
False
The size and number of teeth on a reverse idler gear determine the gear ratio for reverse. True False
False
There is approximately 10 psi residual pressure in the hydraulic clutch lines when the clutch is in the engaged position. True False
False
Transaxles are commonly used on rear-wheel drive vehicles. True False
False
When compared to a diaphragm-type pressure plate, a coil spring pressure plate assembly has fewer moving parts. True False
False
Which of the following is NOT a function of the flywheel? Provides a mounting surface for the starter ring gear Splines on the flywheel hub transfer torque to the transmission input shaft Provides a friction surface for the clutch disk Provides the inertia to rotate the crankshaft through the four strokes
Splines on the flywheel hub transfer torque to the transmission input shaft
A broken clutch cable may be caused by worn engine or transmission mounts. True False
True
A gear ratio of 4:1 is lower than a ratio of 2:1. True False
True
A gear ratio of less than 1.0 indicates an overdrive condition. True False
True
A shift rail and fork is used to control the movement of a synchronizer. True False
True
Chatter is caused by liquid contaminants on the friction surfaces. True False
True
Clutch drag occurs if the clutch disc is not completely released when the clutch pedal is fully depressed. True False
True
Clutch slippage occurs when the clutch disc is not gripped firmly between the flywheel and the pressure plate. True False
True
On a five-speed manual transmission, reverse gear is not normally fitted with a synchronizer. True False
True
Particles of cotton, brass, rope, and wire are added to prolong the life of the clutch disc and provide torsional strength. True False
True
Some manual transmissions use a constant mesh helical gear for reverse. True False
True
Some transaxles have a short, self-centering input shaft that does not require a pilot bushing or bearing. True False
True
Two meshed external-cut gears turn in opposite rotations. True False
True
Until recently, the material that was molded or woven into facings of the clutch disk was predominantly asbestos. True False
True
Using multiple cone synchronizer assemblies reduces the size and weight of the transmission. True False
True
When the clutch is fully engaged, the release bearing is normally stationary. True False
True
Torsional coil springs in the clutch disc ______. absorb the torque forces are the mechanical force holding the pressure plate against the driven disc and flywheel are located between the friction facings all answers are correct
absorb the torque forces
A technician is replacing a leaking clutch slave cylinder. After removing the cylinder, he takes it apart and finds a swollen cup seal. What should be done? replace the clutch slave cylinder replace the clutch master cylinder flush and bleed the system all answers are correct
all answers are correct
Gears can _____. transfer speed and torque decrease speed and increase torque increase speed and decrease torque all answers are correct
all answers are correct
The VSS [vehicle speed sensor] provides information for the ______. speedometer cruise control system upshift lamp all answers are correct
all answers are correct
Which of the following could cause a clutch pedal pulsation? misaligned bellhousing warped flywheel bent or worn release levers all answers are correct
all answers are correct
The backup light switch is located _____. on the transmission case on the shifter linkage both "on the transmission case" and "on the shifter linkage" neither "on the transmission case" nor "on the shifter linkage"
both "on the transmission case" and "on the shifter linkage"
A car jumps out of gear into neutral when decelerating or going down hills. Technician A checks the shift lever and internal gearshift linkage. Technician B says the clutch pilot bearing could be the problem. Who is correct?
both A and B
Final drive ratios are being discussed. Technician A says that the final drive ratio is the gear ratio of the ring gear and pinion gear in a rear axle. Technician B says the final drive ratio is the gear ratio of the pinion gear and ring gear in a transaxle. Who is correct?
both A and B
Internal slave cylinders are being discussed. Technician A says the slave cylinder and the clutch release bearing are a single unit and cannot be serviced separately. Technician B says to replace the slave cylinder, the transmission must be removed. Who is correct?
both A and B
Pilot bearings are being discussed. Technician A says the pilot bearing is located in the flywheel. Technician B says the pilot bearing is located in the crankshaft. Who is correct?
both A and B
Pilot bearings are being discussed. Technician A says the pilot bearing supports one end of the input shaft. Technician B says the pilot bearing keeps the clutch disc centered in the pressure plate. Who is correct?
both A and B
Shift linkages are being discussed. Technician A says cables are used to connect the shift lever to the transmission. Technician B says rods are used to connect the shift lever to the transmission. Who is correct?
both A and B
Shifter linkages are being discussed. Technician A says the shifter interlock prevents the selection of more than one gear during shifting. Technician B says when one of the shift rails is moved by the shifter, the interlock pins hold the other shift rails in their neutral position. Who is correct?
both A and B
Technician A checks the flywheel for runout [warpage] using a dial indicator. Technician B uses a straightedge to check the pressure plate for warpage. Who is correct?
both A and B
Technician A says clutch linkage may be mechanically or hydraulically operated. Technician B says clutch linkage includes shaft and lever linkage and cable linkage designs. Who is correct?
both A and B
Technician A says lower gears allow for lower vehicle speeds but more torque. Technician B says higher gears provide less torque but higher vehicle speeds. Who is correct?
both A and B
Technician A says spur gears have straight cut teeth. Technician B says helical gears have teeth cut at an angle. Who is correct?
both A and B
Technician A says the clutch allows the engine to idle while the vehicle is stopped. Technician B says the clutch is needed for gear shifting. Who is correct?
both A and B
Technician A says the clutch assembly is located between the engine and the transmission. Technician B says the clutch provides a mechanical coupling between the engine flywheel and the transmission input shaft. Who is correct?
both A and B
Technician A says the counter gear is actually several gears machined out of a single piece of steel. Technician B says the counter gear is driven by the clutch (main drive/input) gear and drives the mainshaft speed gears. Who is correct?
both A and B
Technician A says the front of the transmission input shaft may be supported by a pilot bearing. Technician B says on some transaxles the input shaft is not supported by a pilot bearing. Who is correct?
both A and B
Technician A says the main gears are also called speed gears. Technician B says speed gears freewheel around the mainshaft until they are locked to it by the engagement of their shift synchronizer unit. Who is correct?
both A and B
Technician A says the pressure plate assembly squeezes the clutch disc onto the flywheel. Technician B says the pressure plate moves away from the clutch disc so that the disc can stop rotating. Who is correct?
both A and B
Technician A tests for clutch slippage on a road test. Technician B tests for clutch slippage in the shop by engaging the clutch with the transmission in third gear while the vehicle is stationary. Who is correct?
both A and B
When fourth gear is selected on a five-speed manual transmission, the synchronizer couples the ______. fourth speed gear to the mainshaft clutch [input] gear to the mainshaft both "fourth speed gear to the mainshaft" and "clutch [input] gear to the mainshaft" neither "fourth speed gear to the mainshaft" nor "clutch [input] gear to the mainshaft"
clutch [input] gear to the mainshaft
When a small gear drives a larger gear, the output speed _____. decreases and torque decreases decreases and torque increases increases and torque increases increases and torque decreases
decreases and torque increases
Passenger cars and light trucks are now almost exclusively equipped with _____ spring-type clutches. diaphragm coil torsional eccentric
diaphram
Which of the following is not a type clutch release linkage? shaft and lever electromechanical cable hydraulic
electromechanical
Which of the following is probably NOT the cause of a vibrating clutch? excessive crankshaft endplay out-of balance pressure plate assembly excessive flywheel runout loose flywheel bolts
excessive crankshaft endplay
A whirring, grating, or grinding sound that occurs when the clutch pedal is depressed and stops when the pedal is fully released is most likely caused by ______. failed pilot bearing failed release bearing worn release levers bent release fork
failed release bearing
To reduce gear whine, manufacturers use _____ gears. spur helical ellipsoidal parabolic
helical
When a large gear drives a smaller gear, the output speed _____. decreases and torque decreases decreases and torque increases increases and torque increases increases and torque decreases
increases and torque decreases
When the 1-2 shift rail is moved into first gear, the 3-4 and 5-R shift rails are prevented from moving by the ______. detent ball and spring shifter plate shift fork interlock pin
interlock pin
Which of the following is not part of a synchronizer assembly? blocking ring synchronizer hub shifting plates or keys interlock pin
interlock pin
A mirrorlike shine on the pressure plate or a glazed clutch facing that results in chatter could be caused by ______. liquid leaking onto the clutch overheating excessive freeplay worn release bearing
liquid leaking onto the clutch
Which of the following is NOT an advantage of a diaphragm-type clutch pressure plate assembly? more compact manually adjustable clamping pressure less weight fewer moving parts to wear out
manually adjustable clamping pressure
When the clutch pedal is released on a hydraulic clutch linkage, the ______. master cylinder piston is released by the piston return spring master cylinder piston is released by hydraulic pressure slave cylinder is released by hydraulic pressure slave cylinder piston does not move
master cylinder piston is released by the piston return spring
When making a clutch adjustment, it is necessary to ______. measure clutch pedal free travel lubricate the clutch linkage check hydraulic fluid level place the transmission in reverse
measure clutch pedal free travel
Which of the following is NOT a function of gears? multiply torque while increasing speed multiply speed while decreasing torque multiply torque while decreasing speed transfer torque—leave speed unchanged
multiply torque while increasing speed
Gear ratios are being discussed. Technician A says higher gear ratios allow for higher vehicle speeds and more torque. Technician B says lower gear ratios provide less torque and reduce vehicle speed. Who is correct?
neither A nor B
Technician A says an oil-soaked clutch disc cannot cause clutch chatter. Technician B says clutch chatter cannot be caused by loose bell housing bolts. Who is correct?
neither A nor B
Technician A says spur-cut gears have teeth cut at an angle. Technician B says spur-cut gears run without creating gear whine. Who is correct?
neither A nor B
Technician A says that a leaking clutch master cylinder primary seal will cause fluid to leak onto the clutch pedal and driver's footwell. Technician B says that a leaking clutch master cylinder secondary seal will not show externally but will cause the pedal to be low and spongy. Who is correct?
neither A nor B
In a self-adjusting-type cable clutch mechanism, the adjusting mechanism is located ______. on top of the clutch pedal inside the bell housing on the engine side of the firewall at the release fork end of the cable
on top of the clutch pedal
A gear ratio of 0.80:1 is a(n) _____ ratio reduction overdrive direct drive geometric
overdrive
The number of gear teeth per unit of measurement around the gear's diameter is known as gear _____. ratio pitch size load
pitch
Insufficient clutch pedal clearance results in ______. gear clashing when shifting the transmission a noisy front transmission bearing premature release bearing failure premature pilot bearing failure
premature release bearing failure
When the clutch is disengaged, the power flow stops at the ______. transmission input shaft driven disc hub pressure plate and flywheel torsion springs
pressure plate and flywheel
In a five-speed manual transmission/transaxle, an idler gear is used for _____ gear. first and second and third direct drive [fourth gear] overdrive [fifth gear] reverse
reverse
When an idler gear is placed between the driving and driven gear, the driven gear _____. rotates in the same direction as the driving gear rotates in the direction opposite to the driving gear remains stationary rotates faster
rotates in the same direction as the driving gear
When an idler gear is placed between the driving and driven gear, the driven gear ______. rotates in the same direction as the driving gear rotates in the direction opposite to the driving gear remains stationary causes the driven gear to rotate faster
rotates in the same direction as the driving gear
The release bearing on a vehicle with a _____ is kept in contact with the release levers of the rotating pressure plate assembly. As a result, the release bearing rotates constantly with the pressure plate. dual-mass flywheel self-adjusting clutch linkage shaft and lever clutch linkage all answers are correct
self-adjusting clutch linkage
Which type of gear develops the problem of gear whine at higher speeds? spur gear helical gear both "spur gear" and "helical gear" neither "spur gear" nor "helical gear"
spur gear
The component used to lock the main shaft (output shaft) and a speed gear together is the _____. synchronizer shift linkage shift fork transfer case
synchronizer
Which of the following is NOT one of the basic manual transmission shafts? input shaft countershaft mainshaft transfer shaft
transfer shaft
