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DMV PRACTICE
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Georgia CDL Air Brakes Test 1
Practice mode
Question
1
of 25
QUESTION 1 / 25
How should you test the low pressure warning signal?
Choose one answer below.
A
Engage and disable the parking brake.
✓
B
Rapidly press and release the brake pedal.
✓
C
Open the rear shut-off valves.
✓
D
Uncouple and recouple all glad hands.
✓
QUESTION 2 / 25
The application pressure gauge:
Choose one answer below.
A
Shows how much air pressure is being applied to the brakes.
✓
B
Shows the temperature of air being used in the braking system.
✓
C
Shows the pressure of the air coming from the compressor.
✓
D
Shows the number of times the brakes have been used.
✓
QUESTION 3 / 25
In a newer vehicle, you apply the parking brake:
Choose one answer below.
A
By using a diamond-shaped yellow knob.
✓
B
By using a round red knob.
✓
C
By using a square green knob.
✓
D
By using a black round knob.
✓
QUESTION 4 / 25
The ____ tells a driver how much pressure is in the air tanks.
Choose one answer below.
A
Application pressure gauge
✓
B
Air compressor governor
✓
C
Supply pressure gauge
✓
D
Drum brake
✓
QUESTION 5 / 25
The air compressor governor controls:
Choose one answer below.
A
When the air compressor pumps air into the air storage tanks.
✓
B
How fast air is pumped into the air storage tanks.
✓
C
The temperature of air pumped into the air storage tanks.
✓
D
The speed of the vehicle.
✓
QUESTION 6 / 25
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.
Choose one answer below.
A
32 feet
✓
B
15 feet
✓
C
50 feet
✓
D
10 feet
✓
QUESTION 7 / 25
What kind of force must emergency brakes use?
Choose one answer below.
A
Air pressure
✓
B
Mechanical
✓
C
Heavy
✓
D
Electrical
✓
QUESTION 8 / 25
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.
Choose one answer below.
A
100 feet
✓
B
250 feet
✓
C
300 feet
✓
D
450 feet
✓
QUESTION 9 / 25
When you need to stop in an emergency, you should:
Choose one answer below.
A
Lock the wheels and skid to a stop.
✓
B
Stop in a way that keeps your vehicle in a straight line.
✓
C
Stop in a way that turns your vehicle.
✓
D
Expect your vehicle to slow down more quickly than usual.
✓
QUESTION 10 / 25
Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
Choose one answer below.
A
10 psi
✓
B
25 psi
✓
C
50 psi
✓
D
100 psi
✓
QUESTION 11 / 25
The brake pedal is part of which braking system?
Choose one answer below.
A
The service brake system
✓
B
The parking brake system
✓
C
The emergency brake system
✓
D
The auxiliary brake system
✓
QUESTION 12 / 25
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.
Choose one answer below.
A
25 psi
✓
B
50 psi
✓
C
75 psi
✓
D
100 psi
✓
QUESTION 13 / 25
What color are ABS malfunction lamps?
Choose one answer below.
A
Orange
✓
B
Yellow
✓
C
Green
✓
D
Blue
✓
QUESTION 14 / 25
What does ABS do?
Choose one answer below.
A
Prevent wheel lockup
✓
B
Prevent the air compressor from overheating
✓
C
Prevent the front brakes from being used on ice
✓
D
Prevent the brakes from being used if downshifting would be more effective
✓
QUESTION 15 / 25
Truck tractors with air brakes built on or after March 1, 1997 must have:
Choose one answer below.
A
An Anti-Lock Braking System (ABS).
✓
B
Bluetooth.
✓
C
GPS.
✓
D
A rear back-up camera.
✓
QUESTION 16 / 25
What does the air compressor governor do?
Choose one answer below.
A
Controls when the air compressor pumps air into the air storage tanks.
✓
B
Controls how quickly air leaves the air storage tanks.
✓
C
Controls the temperature of the air entering the air storage tanks.
✓
D
Controls the temperature of the air leaving the air storage tanks.
✓
QUESTION 17 / 25
What do anti-lock brakes do?
Choose one answer below.
A
Help a driver avoid wheel lockup
✓
B
Lock up the front wheels
✓
C
Prevent a vehicle from accelerating while traveling uphill
✓
D
Prevent a vehicle from accelerating while traveling downhill
✓
QUESTION 18 / 25
If the air pressure warning light comes on, you should:
Choose one answer below.
A
Continue driving normally.
✓
B
Activate your hazard lights and continue driving.
✓
C
Call the local law enforcement agency.
✓
D
Safely exit the roadway and stop.
✓
QUESTION 19 / 25
During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
Choose one answer below.
A
3 psi in one minute.
✓
B
6 psi in one minute.
✓
C
8 psi in one minute.
✓
D
4 psi in one minute.
✓
QUESTION 20 / 25
On trucks and buses, where are ABS malfunction lamps located?
Choose one answer below.
A
On the driver’s door
✓
B
On the instrument panel
✓
C
On the outside of the vehicle by the passenger’s door
✓
D
Under the hood
✓
QUESTION 21 / 25
If the brake pads rub against the brake drums and create too much heat:
Choose one answer below.
A
The brakes will stick.
✓
B
The brakes will become extra sensitive.
✓
C
The brakes may stop working.
✓
D
The air compressor will kick on to cool the brakes.
✓
QUESTION 22 / 25
To stop in a vehicle that uses air brakes, the driver should:
Choose one answer below.
A
Pull the air brake lever.
✓
B
Engage the brake lever.
✓
C
Push the brake pedal down.
✓
D
Pull the brake pedal up.
✓
QUESTION 23 / 25
The emergency brake system uses:
Choose one answer below.
A
Only parts of the parking brake system.
✓
B
Only parts of the service brake system.
✓
C
Parts of both the parking and service brake systems.
✓
D
Only parts unique to the emergency brake system.
✓
QUESTION 24 / 25
When only the tractor is equipped with an Anti-Lock Braking System (ABS):
Choose one answer below.
A
There is a decreased risk of jackknifing.
✓
B
There is an increased risk of jackknifing.
✓
C
The brakes will not work as effectively as they would without ABS.
✓
D
The brakes will become more sensitive.
✓
QUESTION 25 / 25
If the low pressure warning light comes on while you are driving:
Choose one answer below.
A
Braking will only occur if there is enough air in the tanks.
✓
B
You can brake 14 times before the air in the system runs out.
✓
C
You should continue to drive normally and check the brake system when it is convenient.
✓
D
You should continue driving, but turn the emergency flashers on to warn other motorists.
✓
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