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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Rhode Island CDL knowledge test. The RI CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Rhode Island CDL Manual. Take this RI CDL practice test now to prepare for the actual air brakes test!
1.
To brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary, you can use:
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the "controlled braking" method.
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the "stab braking" method.
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the "controlled braking" method or the "stab braking" method.
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2.
The air brake lag distance at 55 mph on dry pavement adds about:
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60 feet.
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75 feet.
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32 feet.
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3.
The most common foundation brakes found on vehicles with air brakes are the:
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disc brakes.
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S-cam brakes.
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wedge brakes.
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4.
Tar in the road pavement rising to the road surface in very hot weather:
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is very sticky and will slow down your vehicle.
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causes the road to become very slippery.
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does not affect the road surface or driving conditions.
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5.
The spring brakes come on:
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when main air pressure is lost.
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when air pressure in both air brake systems rises to a value set by the manufacturer.
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when you bring the vehicle to a complete stop right away.
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6.
When should you downshift automatic transmissions?
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When going down steep grades.
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When you start to get drowsy.
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7.
Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:
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a rear backup camera.
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hydraulic brakes.
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anti-lock brakes.
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8.
Front wheel braking is good:
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under all conditions.
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Never.
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only in wet conditions.
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9.
Excessive use of the service brakes results in overheating. Too much heat can:
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cause the brakes apply unevenly.
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make the brakes stop working.
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cause the brakes to grab.
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10.
What is a dual air brake system?
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2 separate air brake systems: one system operates the left brakes, the other system operates the right brakes.
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2 separate air brake systems: one system operates the front brakes, the other system operates the rear brakes.
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2 separate air brake systems: one system for daytime driving, the other system for nighttime driving.
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