CDL Air Brake Endorsement Exam Solved 100% Correct.It is not safe to drive a vehicle that has brake drums with cracks that are longer than __ of the width of the friction area. Answer - 1/2
To correct a drive-wheel braking skid, you should: Answer - Stop braking and
steer/counter steer The air compressor stops pumping air at what psi? Answer - 125
Controlled braking: Answer - Is used to keep vehicle braking in a straight line
It is not safe to drive a vehicle that has brake drums (or discs) with cracks or that are thinner than the manufacturer's specifications, generally this will be_ an inch. Answer
- 1/2
- Expansion of the brake drum
What do air brakes use to make the brakes work? Answer - Compressed air Excessive use of the service brakes results in overheating which can lead to: Answer
The air brake lag distance at 55 mph on dry pavement adds about __ feet. Answer - 32 Feet Before driving a truck or bus with a dual air brake system, the pressure in each air brake system should be at least__psi. Answer - 100 The emergency brake system: Answer - Uses parts of the service and parking brake system to stop the vehicle in the event of a brake system failure The parking or emergency brakes of trucks or buses can legally be held on by __ pressure. Answer - Spring The stop light switch: Answer - Turns on the brake lights to warn drivers behind you
The air supply pressure gauge shows how much pressure: Answer - is in the air
tanks Repeatedly pressing and releasing (fanning) the brake pedal may result in: Answer - The loss of air brake pressure If the air compressor should develop a leak, what keeps the air in the tanks? Answer
- The one way check valve
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