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New Jersey CDL Permit Test - Air Brakes

Number of questions: 25
Passing score: 20
Directions: This endorsement is required for driving a vehicle with air brakes. To receive this endorsement, applicants must pass a written test. The test consists of 25 multiple choice questions. Each question has four answer choices. To pass, the applicant must answer at least 20 questions correctly. Test questions come from the New Jersey Commercial Driver Guide. Questions come from the chapter covering: Air Brakes. The Air Brakes endorsement may be used with the Class A, B or C CDL.
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Passing grade —
5 or fewer errors
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1.
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.
2.
While driving downhill, you should brake until you reach a speed that is ____ below your safe speed, then release the brake pedal.
5 mph
10 mph
15 mph
20 mph
3.
Which of the following is not a part of an air brake system?
A service brake system
A parking brake system
An emergency brake system
An axle brake system
4.
Most heavy-duty vehicles use:
Mono air brake systems.
Dual air brake systems.
Triple air brake systems.
Quadruple air brake systems.
5.
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
6.
When the brake pedal is depressed, air brakes work:
Immediately.
After a short delay.
After about a minute.
Only if the green lever on the control panel is pushed down.
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