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

Q.1

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

100
150
200

Q.2

Having ABS on only one axle:

Can be dangerous.
Still allows you additional control when braking.
Slows the vehicle, but cannot stop it.

Q.3

Air tank drains should:

Only be used by mechanics.
Only be used when it is wet outside.
Be used to drain the tanks completely.

Q.4

What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS)
Air brakes
An alternator

Q.5

What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak.
The brakes may stop working.
The brakes may be sluggish.

Q.6

While operating on a downgrade, you should brake until you reach a speed that is:

5 mph below your safe speed.
10 mph below your safe speed.
15 mph below your safe speed.

Q.7

Emergency brakes:

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

Q.8

What is often found in compressed air?

Water
Cardboard
Brake fluid

Q.9

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.10

A dual air brake system:

Consists of two separate air brake systems that share a single set of controls.
Is a single air brake system with two different sets of controls.
Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.

Q.11

While driving, ____ generally holds spring brakes in place.

Air pressure
Electricity
Gasoline

Q.12

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

Green
Blue
Yellow

Q.13

You should ____ if the low pressure warning signal activates while you are driving.

Stop where you are and park
Exit the roadway as soon as safely possible
Continue driving normally

Q.14

During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?

10 psi in one minute
5 psi in one minute
3 psi in one minute

Q.15

When operating a vehicle with a dual air brake system, the driver should:

Let the vehicle warm up before driving to ensure that the fuel reaches the engine.
Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
Begin driving just after the vehicle starts.

Q.16

Air brakes use ____ to function.

Compressed air
Liquid nitrogen
Carbon dioxide

Q.17

A low air pressure warning signal:

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

Q.18

What color malfunction lamps do vehicles equipped with ABS have?

Green
Yellow
Blue

Q.19

If the spring brakes are on, you should:

Not use the brake pedal.
Press the accelerator.
Move the steering wheel.

Q.20

Brake fade is a result of:

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

Q.21

What does an air compressor do in an air brake system?

It pumps air into the air storage tanks.
It fills the tires.
It moves air to the back of the truck.

Q.22

Air brakes use ____ to function.

Compressed air
Liquid air
Nitrogen

Q.23

Using an Anti-Lock Braking System (ABS):

Is required in some states.
Shortens brake response time.
Provides additional control.

Q.24

If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin.
Properly tightened.
Cracked.

Q.25

When an S-cam turns inside a brake drum, the S-cam:

Presses the brake shoes against the inside of the brake drum.
Presses the brake shoes against the brake linings.
Presses the brake linings against the wheel axles.

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