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DMV PRACTICE
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New Jersey CDL Air Brakes Test 1
Practice mode
Question
1
of 25
QUESTION 1 / 25
When the brake pedal is depressed, air brakes work:
Choose one answer below.
A
Immediately.
✓
B
After a short delay.
✓
C
After about a minute.
✓
D
Only if the green lever on the control panel is pushed down.
✓
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
Most heavy-duty vehicles use:
Choose one answer below.
A
Mono air brake systems.
✓
B
Dual air brake systems.
✓
C
Triple air brake systems.
✓
D
Quadruple air brake systems.
✓
QUESTION 4 / 25
Which of the following is not a part of an air brake system?
Choose one answer below.
A
A service brake system
✓
B
A parking brake system
✓
C
An emergency brake system
✓
D
An axle brake system
✓
QUESTION 5 / 25
While driving downhill, you should brake until you reach a speed that is ____ below your safe speed, then release the brake pedal.
Choose one answer below.
A
5 mph
✓
B
10 mph
✓
C
15 mph
✓
D
20 mph
✓
QUESTION 6 / 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 7 / 25
The service brake system:
Choose one answer below.
A
Applies and releases the brakes when you press the brake pedal while driving normally.
✓
B
Applies and releases the parking brakes.
✓
C
Applies and releases the emergency brake.
✓
D
Applies and releases the axle brake.
✓
QUESTION 8 / 25
Pressing and releasing the brake pedal unnecessarily can:
Choose one answer below.
A
Release air faster than it can be replaced.
✓
B
Add more air to a brake system.
✓
C
Make the brake pedal harder to depress.
✓
D
Create a loud noise.
✓
QUESTION 9 / 25
An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:
Choose one answer below.
A
125 psi.
✓
B
100 psi.
✓
C
150 psi.
✓
D
80 psi.
✓
QUESTION 10 / 25
If your tractor is equipped with ABS but your trailer is not, the ABS:
Choose one answer below.
A
Will not be effective.
✓
B
Will still improve your steering control.
✓
C
Will make jackknifing easier.
✓
D
Will allow others to see when you brake.
✓
QUESTION 11 / 25
When traveling down a steep downgrade:
Choose one answer below.
A
The air brakes should be used.
✓
B
Shift into a lower gear, then use brakes to supplement the braking effect of the engine.
✓
C
The vehicle should be continually downshifted in the place of using the brakes.
✓
D
The vehicle should be driven on the shoulder.
✓
QUESTION 12 / 25
To make a stop in a vehicle using air brakes, the driver should:
Choose one answer below.
A
Press down the brake pedal.
✓
B
Lift the brake pedal toward them.
✓
C
Push in the brake knob.
✓
D
Pull out the brake knob.
✓
QUESTION 13 / 25
The air pressure in a dual air brake system should build from 85 to 100 psi within:
Choose one answer below.
A
Two minutes.
✓
B
15 seconds.
✓
C
10 minutes.
✓
D
45 seconds.
✓
QUESTION 14 / 25
Both systems in a dual air brake systems share:
Choose one answer below.
A
Air tanks.
✓
B
Hoses.
✓
C
Air lines.
✓
D
An air compressor.
✓
QUESTION 15 / 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 16 / 25
Air brakes are:
Choose one answer below.
A
An effective tool for stopping large vehicles.
✓
B
Prohibited on large vehicles.
✓
C
Only effective in poor weather.
✓
D
A tool to improve fuel efficiency.
✓
QUESTION 17 / 25
A tank endorsement is:
Choose one answer below.
A
Only required when transporting gases.
✓
B
Only required when transporting liquids.
✓
C
Used when transporting both liquids and gases.
✓
D
Optional when transporting hazardous materials.
✓
QUESTION 18 / 25
A dual air brake system:
Choose one answer below.
A
Has a single air brake system, but uses two sets of controls.
✓
B
Has one air brake system for each side of the truck.
✓
C
Has two brakes for each wheel.
✓
D
Has two separate air brake systems, but uses a single set of controls.
✓
QUESTION 19 / 25
During an applied leakage test, the maximum leakage rate for a double combination vehicle is:
Choose one answer below.
A
10 psi in a minute.
✓
B
8 psi in a minute.
✓
C
6 psi in a minute.
✓
D
4 psi in a minute.
✓
QUESTION 20 / 25
Using an Anti-Lock Braking System (ABS):
Choose one answer below.
A
Shortens stopping distance.
✓
B
Shortens brake response time.
✓
C
Provides less control.
✓
D
Provides more control.
✓
QUESTION 21 / 25
Front brake limiting valves were intended to:
Choose one answer below.
A
Prevent the front tires from skidding.
✓
B
Prevent the front tires from overheating.
✓
C
Create equal brake usage.
✓
D
Remove uncertainty when applying the brakes.
✓
QUESTION 22 / 25
Emergency brakes are:
Choose one answer below.
A
Not required on trucks.
✓
B
Only required on trailers.
✓
C
Required on tractors.
✓
D
Only required when transporting hazardous materials.
✓
QUESTION 23 / 25
Which part of the truck is the air compressor connected to?
Choose one answer below.
A
The transmission
✓
B
The engine
✓
C
The radiator
✓
D
The door latch
✓
QUESTION 24 / 25
What color are ABS malfunction lamps?
Choose one answer below.
A
Orange
✓
B
Yellow
✓
C
Green
✓
D
Blue
✓
QUESTION 25 / 25
What is removed when an air tank is drained?
Choose one answer below.
A
Water and oil
✓
B
Ammonia
✓
C
Wood
✓
D
Chlorine
✓
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