Prevent the air compressor from overheating

Prevent the front brakes from being used on ice

Prevent the brakes from being used if downshifting would be more effective

Georgia CDL Air Brakes 1 - DMV Written Test Questions with Answers

Q.1

How should you test the low pressure warning signal?

Engage and disable the parking brake.
Rapidly press and release the brake pedal.
Open the rear shut-off valves.
Uncouple and recouple all glad hands.

Q.2

The application pressure gauge:

Shows how much air pressure is being applied to the brakes.
Shows the temperature of air being used in the braking system.
Shows the pressure of the air coming from the compressor.
Shows the number of times the brakes have been used.

Q.3

In a newer vehicle, you apply the parking brake:

By using a diamond-shaped yellow knob.
By using a round red knob.
By using a square green knob.
By using a black round knob.

Q.4

The ____ tells a driver how much pressure is in the air tanks.

Application pressure gauge
Air compressor governor
Supply pressure gauge
Drum brake

Q.5

The air compressor governor controls:

When the air compressor pumps air into the air storage tanks.
How fast air is pumped into the air storage tanks.
The temperature of air pumped into the air storage tanks.
The speed of the vehicle.

Q.6

If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.

32 feet
15 feet
50 feet
10 feet

Q.7

What kind of force must emergency brakes use?

Air pressure
Mechanical
Heavy
Electrical

Q.8

An air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately ____ to come to a complete stop.

100 feet
250 feet
300 feet
450 feet

Q.9

When you need to stop in an emergency, you should:

Lock the wheels and skid to a stop.
Stop in a way that keeps your vehicle in a straight line.
Stop in a way that turns your vehicle.
Expect your vehicle to slow down more quickly than usual.

Q.10

Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.

10 psi
25 psi
50 psi
100 psi

Q.11

The brake pedal is part of which braking system?

The service brake system
The parking brake system
The emergency brake system
The auxiliary brake system

Q.12

Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.

25 psi
50 psi
75 psi
100 psi

Q.13

What color are ABS malfunction lamps?

Orange
Yellow
Green
Blue

Q.14

What does ABS do?

Prevent wheel lockup
Prevent the air compressor from overheating
Prevent the front brakes from being used on ice
Prevent the brakes from being used if downshifting would be more effective

Q.15

Truck tractors with air brakes built on or after March 1, 1997 must have:

An Anti-Lock Braking System (ABS).
Bluetooth.
GPS.
A rear back-up camera.

Q.16

What does the air compressor governor do?

Controls when the air compressor pumps air into the air storage tanks.
Controls how quickly air leaves the air storage tanks.
Controls the temperature of the air entering the air storage tanks.
Controls the temperature of the air leaving the air storage tanks.

Q.17

What do anti-lock brakes do?

Help a driver avoid wheel lockup
Lock up the front wheels
Prevent a vehicle from accelerating while traveling uphill
Prevent a vehicle from accelerating while traveling downhill

Q.18

If the air pressure warning light comes on, you should:

Continue driving normally.
Activate your hazard lights and continue driving.
Call the local law enforcement agency.
Safely exit the roadway and stop.

Q.19

During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:

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

Q.20

On trucks and buses, where are ABS malfunction lamps located?

On the driver’s door
On the instrument panel
On the outside of the vehicle by the passenger’s door
Under the hood

Q.21

If the brake pads rub against the brake drums and create too much heat:

The brakes will stick.
The brakes will become extra sensitive.
The brakes may stop working.
The air compressor will kick on to cool the brakes.

Q.22

To stop in a vehicle that uses air brakes, the driver should:

Pull the air brake lever.
Engage the brake lever.
Push the brake pedal down.
Pull the brake pedal up.

Q.23

The emergency brake system uses:

Only parts of the parking brake system.
Only parts of the service brake system.
Parts of both the parking and service brake systems.
Only parts unique to the emergency brake system.

Q.24

When only the tractor is equipped with an Anti-Lock Braking System (ABS):

There is a decreased risk of jackknifing.
There is an increased risk of jackknifing.
The brakes will not work as effectively as they would without ABS.
The brakes will become more sensitive.

Q.25

If the low pressure warning light comes on while you are driving:

Braking will only occur if there is enough air in the tanks.
You can brake 14 times before the air in the system runs out.
You should continue to drive normally and check the brake system when it is convenient.
You should continue driving, but turn the emergency flashers on to warn other motorists.