Braking system chapter 92

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Normally open

A typical brake light is electrically ____.

Low spongy brake pedal

Air in the lines will cause what type of problem?

Worn outer ribs

Flexible brake hoses are inspected for cracks, twisting, & leakage but not from ____.

Metering valve

The button on the ____ should be held when pressure bleeding the brakes.

Restore like-new performance

What is the purpose of any brake repair?

Rubber diaphragm or floating disc

What part in the master cylinder helps keep air from contacting the brake fluid yet allows the fluid level to drop as the disc brakes wear?

less traction

A locked wheel has ____ to the road surface than a rolling wheel

The boiling temperature decreases

As brake fluid ages, what happens?

Pads

Disc brakes use replaceable friction material called?

Brake noise levels

FMVSS 135 does not specify ____.

Technician B

Technician A says that the front brakes do most of the breaking because the front brakes are longer. Technician B says that due to weight transfer, most of the breaking force needs to be done by the front brakes. Which technician is correct?

Both Technicians

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

The brakes on a vehicle work okay for a while, then the vehicle slows because the brakes self-applied. Technician A says that an overfilled master cylinder could be the cause. Technician B says that a blocked vent port(compensating port) could be the cause. Which technician is correct?

A controlled brake application

A brake snub is ____.

Maintain a slight pressure on the hydraulic system

A residual check valve is used to____.

Both Technicians

A spongy brake pedal is being diagnosed. Technician A says that air in the hydraulic system could be the cause. Technician B says that a defective pressure-differential switch could be the cause. Which technician is correct?

Kinetic energy of a vehicle doubles when the speed doubles

A wrong statement about breaking.

Technician A

An owner of a vehicle equipped with ABS brakes complained that whenever he tired to stop on icy or slippery roads, the brake pedal would pulse up and down rapidly. Technician A says that this is normal for many ABS units. Technician B says that the Abs unit is malfunctioning. Which technician is correct?

Whenever driving through water puddles or during severe thunderstorms

Brake fade caused by water can occur ____.

1300*F (700*C)

Disc brake pads can reach temperatures as high as ____.

Depending on the make and model of the vehicle

Does a combination valve include metering valve, proportion valve, and pressure-differential valve?

Linings (Shoes)

Drum brakes use replaceable friction material called?

Speed difference between the two surfaces

Friction between two surfaces is not affected by ____.

Vent port

If the brake pedal linkage is not adjusted correctly, brake fluid may not be able to expand back into the reservoir through the ____ of the master cylinder when the brakes get hot.

16 to 32ft/sec(2)

Maximum deceleration rates for a typical passenger car or light truck is ____.

Neither Technician

Technician A says a pull to the right during braking could be caused by defective metering valve. Technician B says a pull to the left could be caused by a defective pro proportioning valve. Which technician is correct?

Technician B

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

Technician A says that a power-assisted brake reduces stopping distances compared with a nonpowered-assisted brake system. Technician B says that the power-assisted brake system reduces the force that the driver must exert on the brake pedal. Which technician is correct?

Technician B

Technician A says that all vehicles equipped with ABS will experience a pulsating brake pedal even during normal breaking. Technician B says that some ABS units only control the rear wheel brakes. Which technician is correct?

Technician A

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 deals to swell slightly. Which technician is correct?

Both Technicians

Technician A says that the thicker or heavier the disc brake rotor, the more heat can be absorbed. Technician B says that the faster the vehicle is traveling when the brakes are applied, the greater the amount of heat created in the break system. Which technician is correct?

The performance of the braking system

The FMVSS 135 standards determine_____.

RR, LR, RF, LF

The brake bleeding procedure usually specified for a rear-wheel vehicle with a dual split master cylinder is ____.

Increase the drivers force on the brake pedal applied to the master cylinder

The brake pedal assembly uses a mechanical lever to____.

One teaspoon

The master cylinder is able to move about how much brake fluid during each brake application?

Technician A

The primary brake circuit fails due to a leak in the lines, leaving the rear section of a dual split master cylinder. Technician A says that the driver will notice a lower than normal brake pedal and some reduce breaking power. Technician B says that the brake pedal will "grab" higher than normal. Which technician is correct?

Technician B

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

The rear wheels lock up during hard breaking. 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 technic

Double Flare & ISO

The two types of flares used on brake lines are ____.

DOT 3

The type of brake fluid most often recommended by vehicle manufacturers is ____.

Both Technicians

Two technicians are discussing a problem where the brake pedal travels too far before the vehicle starts to slow. Technician A says that the brakes may be out of adjustment. Technician B says that one circuit from the master cylinder may be leaking or defective. Which technician is correct?

Both Technicians

Two technicians are discussing master cylinders. Technician A says that it is normal to see fluid movement in the reservoir when the brake pedal is depressed. Technician B says a defective master cylinder can cause the brake pedal to slowly sink to the floor when depressed. Which technician is correct?

Technician B

Two technicians are discussing why the brake lines are coiled away 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?

Absorbed with a cloth absorbent material and disposed of in regular trash

Used brake fluid should be ____.

Select a lower transmission gear

What can the driver do to reduce the possibility of brake fade caused by heat?

Lasts the life of the vehicle unless there is a leak

What is not a characteristic of conventional brake fluid?

Front-Wheel Drive

Which type of vehicles most often do not use metering valves?

To help prevent damage to the brake hose

Why should brake calipers be supported by a wire during brake services and not allowed to hang by the flexible brake hose?

Rotor

_____ is not a type of brake fade.


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