Kentucky CDL Air Brakes 1 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

A wig wag is:

A low pressure warning device.
A tube that carries air to the brakes.
A type of air brake system.

Q.2

The ____ are activated by an electric switch that is triggered by the brake pedal.

Headlights
Turn signals
Brake lights

Q.3

To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

Set the control to normal.
Set the control to the off position.
Set the control to the neutral position.

Q.4

Brakes out of adjustment will:

Work properly.
Cause some of the brakes to overwork and malfunction.
Allow better acceleration.

Q.5

An Anti-Lock Braking System (ABS):

Is not available for vehicles with air brakes.
Is not helpful in most driving situations.
Can help you maintain control when braking.

Q.6

What kind of force do emergency brakes use?

Air pressure
Mechanical
Heavy

Q.7

An emergency brake must be controlled by:

Mechanical force.
Air pressure.
Gravity.

Q.8

If the safety relief valve in the air brake system releases air:

The compressor needs more air.
The air pressure has become too high.
The brakes are fully operational.

Q.9

What do the two systems of a dual air brake system share?

Hoses
An air compressor
Air tanks

Q.10

Brake fade is a result of:

Brakes being exposed to sunlight.
Brakes being exposed to moisture.
Excessive use of the brakes.

Q.11

Brakes can get out of adjustment quickly, especially:

If they are hot.
In the winter time.
If they are used frequently.

Q.12

Emergency brakes:

Are not required on vehicles with air brakes.
Are required only on buses.
Are required on all vehicles.

Q.13

Which of the following is not part of a vehicle’s air brake system?

Air gauges
Low pressure warning device
Air filter

Q.14

A safety valve is set to open at ____ pounds per square inch (psi).

100
150
200

Q.15

On flat surfaces, wheel chocks:

Can be used to prevent a parked vehicle from moving.
Make it easier for a parked vehicle to roll.
Should only be used on the front driver's side tire.

Q.16

The parking brake in a newer vehicle is applied by:

Moving a lever to the right.
Pushing a yellow, diamond-shaped knob.
Pulling a yellow, diamond-shaped knob.

Q.17

Failing to drain air tanks could result in:

Water accumulations freezing and causing brake failure.
Squishy brakes.
Too much air collecting in the tanks.

Q.18

When parked on a flat surface, you should:

Use wheel chocks to prevent your vehicle from moving.
Not use wheel chocks.
Use wheel chocks, but only if you have applied the parking brake.

Q.19

During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

3 psi in one minute.
6 psi in one minute.
8 psi in one minute.

Q.20

The air compressor is connected to the:

Transmission.
Engine.
Radiator.

Q.21

If you are braking on dry pavement while traveling at 55 mph, how much distance will brake lag add to your overall stopping distance?

32 feet
45 feet
20 feet

Q.22

What do air brakes use to make the brakes work?

Compressed air
Outside air
Non-compressed air

Q.23

Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.

Green
Blue
Yellow

Q.24

A low air pressure warning signal:

Is not recommended on vehicles with air brakes.
Is required on vehicles with air brakes.
Is optional on vehicles with air brakes.

Q.25

Why do large vehicles use air brakes?

Other brake systems squeak too loudly.
Air brakes are very effective systems.
Other braking systems are hard to come by.

0 h : 0 m : 1 s