Chapter 95 - 108
The bearing grease most often specified is rated NLGI ________.
#2
After a non-drive-wheel bearing has been properly adjusted, the wheel should have how much end play?
0.001 to 0.005 in.
Most brake experts and vehicle manufactures recommend replacing brake lining when the lining thickness is _____.
0.060 inches (1.5mm)
The backing plate should be replaced when the shoe contact area are worn more than _____.
1/16th inch (1.5mm)
The rear brakes should be inspected, and adjusted if necessary, if the parking brake requires more than ________.
10 clicks
Which Federal Motor Safety Standard requires electronic stability control to be on all vehicles by 2011?
126
The proper operation of a vacuum brake booster requires that the engine be capable of supplying at least ________.
15 in Hg vacuum
The usual maximum pressure that should be used when pressure bleeding a brake system is ________.
30 PSI
A typical drum brake backing plate has how many shoe support pads (also called ledges)?
6
Most wheel speed sensors should measure how much resistance?
800 to 1,400 ohms
The first step in diagnosing a Hydro-Boost problem is ________.
A thorough visual inspection
In a typical integral rear disc brake caliper, the parking brake cable moves the ________.
Actuator screw
If a vehicle tends to continue straight ahead while cornering, this condition is called _____.
All of the above
Drum brake shoes ________.
All of the above are possible
What other name is used to describe an electronic stability control (ESC) system?
Any of the above
A combination valve includes ________.
Any of the above depending on the make and model of the vehicle
A lateral acceleration sensor is usually located where in the vehicle?
Any of the above locations
Vacuum is applied where during vacuum bleeding?
At each wheel brake bleeder valve
Technician A says that most ABS units are the non-integral type. Technician B says that the ABS is disabled (does not function) below about 5 mph (8 km/h). Which technician is correct?
Both Technician A and B
Technician A says that the ABS system is designed so that the pressure to the wheel brakes is never higher than the pressure the driver is applying through the brake pedal. Technician B says that a pulsating brake pedal during normal braking is a characteristic feature of most ABS-equipped vehicles. Which technician is correct?
Both Technician A and B
Technician A says that many vehicle manufacture recommend that wheel cylinders not be honed because of the special surface finish inside the bore. Technician B says that some experts recommend the wheel cylinders be replaced every time the brake linings are replaced. Which technician is correct?
Both Technicians A and B
Technician A says that silicone brake greases can be used to lubricate the shoe contact ledges. Technician B says that synthetic brake grease, lithium brake grease, or anti seize compound can be used as a brake lubricant. Which technician is correct?
Both Technicians A and B
Technician A says that the star wheel adjusters use different threads (left and right-handed) for the left and right sides of the vehicle. Technician B says that the threads and end caps of the adjusters should be lubricated with brake grease before installing. Which technician is correct?
Both Technicians A and B
A vehicle is hoisted during routine service and the service technician discovers that the left front wheel does not turn when force is applied. Technician A says that the hoist (lift) pads could be against the left front tire. Technician B says that the disc brake caliper piston stuck in the bore is the most likely cause. Which technician is correct?
Both Technicians A and B
After assembling a drum brake, it is discovered that the brake drum will not fit over the new brake shoes. Technician A says that the parking brake cable may not have been fully released. Technician B says to check to see if both shoes are contacting the anchor pin. Which technician is correct?
Both Technicians A and B
Technician A says that ABS brakes are designed to allow the front wheel to be steered during heavy braking. Technician B says that the ABS dash warning lamp is amber. Which technician is correct?
Both Technicians A and B
Technician A says that a breakout box is sometimes required to diagnose an antilock braking system. Technician B says that a breakout box requires the use of a digital multimeter. Which technician is correct?
Both Technicians A and B
Technician A says that a defective wheel or axle bearing often makes a growling or rumbling noise. Technician B says that a defective wheel or axle bearing often makes a noise similar to a tire with an aggressive mud or snow design. Which technician is correct?
Both Technicians A and B
Technician A says that a hose clamp can be used to compress the retainer fingers of a parking brake cable in order to remove it from the backing plate. Technician B says a box-end wrench can be used instead of a hose clamp. Which technician is correct?
Both Technicians A and B
Technician A says that a lack of lubrication on the back of the disc brake pads can cause brake noise. Technician B says that pads that are not correctly crimped to the caliper housing can cause brake noise. Which technician is correct?
Both Technicians A and B
Technician A says that a noise or vibration may be sensed by the driver when the ABS performs a self-test. Technician B says that the ABS fuse may have to be removed to erase some ABS diagnostic codes if a scan tool is not used. Which technician is correct?
Both Technicians A and B
Technician A says that a scan tool may be required to retrieve data and diagnostic trouble codes from some antilock braking systems. Technician B says that a jumper wire can be used to retrieve diagnostic trouble codes on some antilock braking systems. Which technician is correct?
Both Technicians A and B
Technician A says that an electric parking brake (EPB) uses an electric motor to pull the parking brake cable. Technician B says that some electric parking brake systems use a computer-controlled motor attached to the caliper. Which technician is correct?
Both Technicians A and B
Technician A says that disc brake pads should be replaced when worn to the thickness of the steel backing. Technician B says the pads should be removed and inspected whenever there is a brake performance complaint. Which technician is correct?
Both Technicians A and B
Technician A says that disc brakes are self-adjusting and the brake pedal height should not become lower as the disc brake pads wear. Technician B says that as the disc brake pads wear, the level of brake fluid in the master cylinder reservoir drops. Which technician is correct?
Both Technicians A and B
Technician A says that drum brakes can fail to slow the vehicle if driven through deep water. Technician B says that when drum brakes get hot, the brake pedal will drop because the drum expands away from the shoes. Which technician is correct?
Both Technicians A and B
Technician A says that riveted disc brake pads are often quieter than bonded disc pads. Technician B says integral molded side brake pads are molded into holes in the steel backing of the pads. Which technician is correct?
Both Technicians A and B
Technician A says that some proportioning valves are one part and used to control both rear brakes. Technician B says that some proportioning valves are two parts; one for each rear wheel brake. Which technician is correct?
Both Technicians A and B
Technician A says that some wheel speed sensors are enclosed in a wheel bearing assembly. Technician B says that some wheel speed sensors are exposed to possible damage from road debris. Which technician is correct?
Both Technicians A and B
Technician A says that starwheel adjusters use different threads (left- and right-handed) for the left and right sides of the vehicle. Technician B says that a pawl controls the teeth of the starwheel adjuster. Which technician is correct?
Both Technicians A and B
Technician A says that the ABS electrohydraulic unit can be bled using bleeder screws and the manual method. Technician B says that a scan tool is often required to bleed the ABS electrohydraulic unit. Which technician is correct?
Both Technicians A and B
Technician A says that the anchor pin (shoe anchor) is used to hold one end of the primary and secondary shoe return springs. Technician B says that shoe anchor prevents the brake shoes from rotating with the drum when the brakes are applied. which technician is correct?
Both Technicians A and B
Technician A says that the parking brake hand lever can turn on the red brake warning lamp. Technician B says that a foot-operated parking brake can turn on the red brake warning lamp. Which technician is correct?
Both Technicians A and B
Technician A says that the red brake warning light can be turned on if a difference in pressure is detected by the pressure-differential switch. Technician B says that the red brake warning light can be turned on if the brake fluid level sensor detected low brake fluid level. Which technician is correct?
Both Technicians A and B
Technician A says that to check the operation of a vacuum brake booster, the brake pedal should be depressed until the assist is depleted and then start the engine. Technician B says that the brake pedal should drop when the engine starts, if the booster is okay. Which technician is correct?
Both Technicians A and B
Technician A says that, with some antilock braking systems, the diagnostic trouble code may be lost if the ignition is turned off before retrieving the code. Technician B says that some antilock braking sytems require that a terminal be grounded to cause the amber ABS warning lamp to flash diagnostic trouble codes. Which technician is correct?
Both Technicians A and B
Technician A says to use masking tape temporarily over the lining material to help prevent getting grease on the lining. Technician B says that grease on the brake lining can cause the brakes to grab. Which technician is correct?
Both Technicians A and B
The red brake warning lamp is on and the amber ABS lamp is off. Technician A says that a fault is possible in the base brake system. Technician B says that the red brake warning lamp can be turned on by a low brake fluid level in the master cylinder. Which technician is correct?
Both Technicians A and B
Two technicians are discussing a floating-type disc brake caliper. Technician A says that if the caliper slides are corroded, one pad may wear more than the other pad on the same wheel brake. Technician B says that if a caliper slide is corroded, reduced braking may occur. Which technician is correct?
Both Technicians A and B
Two technicians are discussing differentials. Technician A says all differentials are vented. Technician B says that a clogged vent can cause the rear axle seal to leak. Which technician is correct?
Both Technicians A and B
Two technicians are discussing the reason that the brake fluid level in the master cylinder drops. Technician A says that it may be normal due to the wear of the disc brake pads. Technician B says that a low brake fluid level may indicate a hydraulic leak somewhere in the system. Which technician is correct?
Both Technicians A and B
Uneven disc brake pad wear is being discussed. Technician A says the caliper piston may be stuck. Technician B says the caliper may be stuck on the slides and unable to "float." Which technician is correct?
Both Technicians A and B
What part(s) should be replaced when servicing a wheel bearing on a non-drive wheel?
Both the grease seal and the cotter key
On a bearing that has been shock loaded, the race (cup) of the bearing can be dented. This type of bearing failure is called ________.
Brinelling
The differential cover must be removed before removing the rear axle on which type of axle?
C-lock
Old brake shoes are often returned to the manufacture when new friction material is installed. Those old shoes are often called the ____
Core
The type of brake fluid most often recommended by vehicle manufacturers is ________.
DOT 3
Most manufacture recommend that brake parts should be cleaned with ____.
Denature alcohol
Used brake fluid should be ________.
Disposed of properly according to state and local laws
The two types of flares used on brake lines are ________.
Double flare and ISO
Most sealed bearings used on the front wheels of frontwheel-drive vehicles are usually which type?
Double-row ball bearing
A traction control system can often control all except ___________.
Engage Four- wheel drive
If the engine stops running, the Hydro-Boost will not be able to provide any power assist for the brakes.
False
A non-drive-wheel bearing adjustment procedure includes a final spindle nut tightening torque of ________.
Finger tight
Which type of disc brake caliper may leak brake fluid more often?
Fixed
Which type of antilock braking system (ABS) requires the use of four wheel speed sensors?
Four channel
The electronic stability control (ESC) system requires that the vehicle be equipped with what type of brake system?
Four channel ABS
The ABS computer uses what signal characteristic from a wheel speed sensor?
Frequency
On most vehicles, the anti-rattle spring (strut spring) should be installed on the parking brake strut toward the ________ of the vehicle.
Front
Which type of vehicles most often do not use metering valves?
Front-wheel drive
A defective vacuum brake booster will cause a ________.
Hard brake pedal
Air in the brake hydraulic system can cause all except ________.
Hard brake pedal
A diagnostic trouble code (DTC) has been set for a fault with a lateral acceleration sensor or circuit. What test could be performed to check if the sensor is working?
Key on; Engine off, hold the sensor sideways to see if a scan tool reads 1.0 G
Which of the following is not a characteristic of conventional brake fluid?
Lasts the life of the vehicle unless there is a leak
Which lining does most of the braking on a leading-trailing brake?
Leading (forward facing)
A quick-take-up master cylinder is required when what type of caliper design is used on a vehicle?
Low-drag
A residual check valve is used to ________.
Maintain a slight pressure on the hydraulic system
The button on the ________ valve should be held when bleeding the brakes.
Metering
The button on the ________ valve should be held when pressure bleeding the brakes.
Metering
A brake pedal feels spongy when depressed. Technician A says that a defective hydraulic brake booster could be the cause. Technician B says that a defective vacuum brake booster could be the cause. Which technician is correct?
Neither Technician A nor B
Technician A says a pull to the right during braking could be caused by a defective metering valve. Technician B says a pull to the left could be caused by a defective proportioning valve. Which technician is correct?
Neither Technician A nor B
Technician A says that all vehicles equipped with rear disc brakes use a parking brake that is integrated in the caliper. Technician B says that all vehicles equipped with rear disc brakes use a small drum brake inside the rear rotor for a parking brake. Which technician is correct?
Neither Technician A nor B
Technician A says that the brake pedal should be depressed with as much force as possible during the normal bleeding procedure. Technician B says that the brake pedal should be pumped rapidly during this manual bleeding procedure to force the air down toward the bleeder valve(s). Which technician is correct?
Neither Technician A nor B
Two technicians are discussing drum brake shoes. Technician A says that forward and rearward facing shoes are the same and can be installed in either position on any drum brake system. Technician B says that the darker color lining should always be placed toward the front of the vehicle. Which technician is correct?
Neither Technician A nor B
A typical brake light is electrically ________.
Normally open
Traction control uses the antilock braking system and other devices to limit __________ of the drive wheels during acceleration.
Positive slip
On most drum brake systems, the parking brake lever and strut transfer the pulling force of the parking brake cable against the ________.
Primary shoe
An accumulator such as that used on electric or hydraulic brake boosters ________.
Provides a reserve in the event of a failure
The brake bleeding procedure usually specified for a rearwheel vehicle with a dual split master cylinder is ________.
RR, LR, RF, LF
Brake pedal feedback to the driver is provided by the ________.
Reaction system
Which lining does most of the braking on a dual-servo brake?
Rear (rearward facing)
What is the name of the standard test that is performed to verify ESC operation?
Sine with dwell
The maximum traction between a tire and the road occurs when the tire is ________.
Slipping 10% to 20%
Semimetallic brake pads are made by a process called ________.
Snitering
What part causes the disc brake caliper piston to retract when the brakes are released?
Square cut O ring
A typical disc brake caliper overhaul (OH) kit usually includes what parts?
Square cut O-ring and dust boot
Which sensor is used by the ESC controller to determine the driver's intended direction?
Steering wheel (hand wheel) position sensor
Which is not a recommended type of grease to use on brake parts?
Synthetic Grease
Which type of automotive bearing can withstand radial and thrust loads, yet must be adjusted for proper clearance?
Tapered roller bearing
A "chirping" noise is heard while the vehicle is moving forward, but stops when the brakes are applied. Technician A says that the noise is likely caused by the disc brake pad wear sensors. Technician B says the noise is likely a wheel bearing because the noise stops when the brakes are applied. Which technician is correct?
Technician A only
Technician A says that glycol-based brake fluid causes the seals to swell slightly. Technician B says the DOT 5 (silicone based) brake fluid causes rubber seals to swell slightly. Which technician is correct?
Technician A only
Technician A says that if the parking brake cable is adjusted too tight, the rear brakes may drag and overheat. Technician B says that the parking brake is adjusted properly if the cable is tight when in the released position. Which technician is correct?
Technician A only
Technician A says that using the space-saving small spare tire may trigger an ABS amber warning lamp. Technician B says the use of the small spare tire may trigger the red brake warning lamp. Which technician is correct?
Technician A only
Two technicians are discussing ABS wheel speed sensors. Technician A says that some ABS systems use a sensor located in the rear-axle pinion gear area. Technician B says that all ABS systems use a wheel speed sensor at each wheel. Which technician is correct?
Technician A only
Two technicians are discussing brake lining edge codes. Technician A says that the code can identify the manufacturer. Technician B says that all friction material from the same manufacturer will have the same edge codes. Which technician is correct?
Technician A only
Two technicians are discussing how to loosen bleeder valves. Technician A says that a shock is usually necessary to break the taper at the base of the valve. Technician B says to apply steady, loosening torque to the bleeder valve using a 6-point wrench. Which technician is correct?
Technician A only
Two technicians are discussing magnetic-type wheel speed sensors. Technician A says that wheel speed sensors are magnetic. Technician B says that the toothed sensor ring is magnetic. Which technician is correct?
Technician A only
Two technicians are discussing ways of removing a caliper piston. Technician A says to use compressed air. Technician B says to use large pliers. Which technician is correct?
Technician A only
A customer wanted the ABS checked because of tire chirp noise during hard braking. Technician A says that the speed sensors may be defective. Technician B says that tire chirp is normal during an ABS stop on dry pavement. Which technician is correct?
Technician B only
A rear drum brake is being inspected. The primary shoe is not contacting the anchor pin at the top. Technician A says that this is normal. Technician B says that the parking brake cable may be adjusted too tight or is stuck. Which technician is correct?
Technician B only
Technician A says that ABS-equipped vehicles can stop quickly and without skidding on all road surfaces even if covered with ice. Technician B says that steering is possible during an ABS stop. Which technician is correct?
Technician B only
Technician A says that DOT 5 brake fluid can be added to DOT 3 brake fluid. Technician B says that it is wise to purchase brake fluid that is in metal rather than plastic containers. Which technician is correct?
Technician B only
Technician A says that a loaded caliper includes an over hauled caliper assembly but no pads or hardware. Technician B says that a loaded caliper includes the pads and all needed hardware. Which technician is correct?
Technician B only
Technician A says that a steel piston should be cleaned with sandpaper to remove rust. Technician B says that the brake assembly fluid or clean brake fluid should be used to lubricate the caliper pistons before installing in the caliper. Which technician is correct?
Technician B only
Technician A says that the parking brake cable should be adjusted at each wheel. Technician B says that the parking brake cable adjustment is usually done after adjusting the rear brakes. Which technician is correct?
Technician B only
Technician A says that the tinnerman nuts are used to hold the brake drum on and should be reinstalled when the drum is replaced. Technician B says that a drum should be removed inside a sealed vacuum enclosure or washed with water or solvent to prevent possible asbestos dust from being released into the air. Which technician is correct?
Technician B only
The bleeder is opened at a caliper and no brake fluid flows out. Technician A says that this is normal and that brake fluid should not flow or drip out of an open bleeder valve. Technician B says that the vent port in the master cylinder may be blocked. Which technician is correct?
Technician B only
The rear brakes lock up during a regular brake application. Technician A says the metering valve could be the cause. Technician B says that stuck front disc brake calipers could be the cause. Which technician is correct?
Technician B only
The rear wheels lock up during hard braking. Technician A says that a defective metering valve could be the cause. Technician B says that a defective proportioning valve could be the cause. Which technician is correct?
Technician B only
Two technicians are discussing bench bleeding a master cylinder. Technician A says that the front (nose end) of the master cylinder should be bled first. Technician B says that the rear (brake pedal end) should be bled first. Which technician is correct?
Technician B only
Two technicians are discussing drum brake self-adjusters. Technician A says that a frozen starwheel adjuster can cause the brakes to lock up due to the adjusting lever being unable to move the adjuster causing the linkage to bind. Technician B says that some brakes self-adjust when the brakes are applied rather than when released. Which technician is correct?
Technician B only
Two technicians are discussing vacuum brake boosters. Technician A says that a low, soft brake pedal is an indication of a defective booster. Technician B says that there should be at least two power-assisted brake applications after the engine stops running. Which technician is correct?
Technician B only
Two technicians are discussing why the brake lines are coiled near the master cylinder on many vehicles. Technician A says that these coils help prevent moisture from flowing from the master cylinder to the calipers. Technician B says that they help prevent cracks that could be caused by vibrations. Which technician is correct?
Technician B only
As brake fluid ages, what happens?
The boiling temperature decreases
The brake pad edge code letters "FF" mean ________.
The coefficient of friction rating
Why should brake calipers be supported by a wire during brake service and not allowed to hang by the flexible brake hose?
To help prevent damage to the brake hose
The purpose of the charcoal filter in the vacuum hose between the engine and the vacuum brake booster is to ________.
Trap gasoline vapors to keep them from entering the booster
How does a bleeder valve seal?
Trending End
The faster a wheel rotates, the higher the frequency produced by a wheel speed sensor.
True
Flexible brake hose should be inspected for all of the following except:
Worn outer ribs