DMV CDL TEST EXAM WITH 100

DMV CDL TEST EXAM WITH 100%

CORRECT ANSWERS

You should know that brakes are fading when: - Correct Answer-You have to push

harder on the brake pedal to control your speed on a down grade.The brake system that applies the use of the brakes when the driver uses the brake is

the: - Correct Answer-Service brake system.

The air compressor governor controls: - Correct Answer-When air is pumped into the air tanks.If your truck's air compressor has its own oil supply. When should you first check its oil level? - Correct Answer-Before driving.For air brake systems in good conditions the air compressor should start pumping at

about: - Correct Answer-100 psi

If your vehicle has an alcohol evaporator, it is there to: - Correct Answer-Reduce the risk of ice in air brake valves in cold weather.Some air brake systems have an alcohol evaporator. What will happen if you don't keep the unit filled with alcohol? - Correct Answer-Ice will form in the storage tanks and cause the brakes to fail.The safety valve is set automatically to reduce pressure at: - Correct Answer-150 psi The brake pedal in an air brake system: - Correct Answer-Controls the air pressure applied to put on the brakes.Repeatedly presssing and releasing (fanning) the brake pedal may result in: - Correct Answer-The loss of air pressure.The most common type of foundation brake found on heavy vehicle is the: - Correct Answer-S-cam drum.S-cam: - Correct Answer-Forces the brakes shoes against the inside of the brake drum.When the brakes are applied the brake shoes or linings are pressed against the: - Correct Answer-Brake drums or disc.All air brake equipped vehicles have: - Correct Answer-A supply pressure gauge. 1 / 2

The application pressure gauge shows how much air pressure you: - Correct Answer- Are applying to the brakes.Stop light switch: - Correct Answer-Turns on the brake lights to warn drivers behind you.Under normal conditions in order to engage the parking brakes the driver must first: - Correct Answer-Make sure the air brake system is fully pressurized.

The braking power of the spring brakes: - Correct Answer-Depends on the service

brakes being in adjustment.The parking or emergency brake on trucks and buses can only be held by: - Correct Answer-Spring pressure If the spring brakes are on you should push the brake pedal: - Correct Answer-Never If your truck or bus has dual parking control valves, you can use pressure from a separate tank to: - Correct Answer-Release the spring emergency/parking brakes to move a short distance.The driver must be able to see a warning before air pressure in the service air tanks

falls below: - Correct Answer-60 P.S.I.

The most important thing to do when the low air warning comes on: - Correct Answer- Stop and safely park as soon as possible.Your vehicle has a dual air brake system. If a low air pressure warning comes on for the secondary system; you should: - Correct Answer-Bring the vehicle to a safe stop and continue only when the system is fixed.If your truck has a dual air system and one of the system is low pressure: - Correct Answer-Either the front or.rear brakes will not be fully operational.To check the free play of manual slack adjusters on S-cam brakes, you should park on:

• Correct Answer-Level ground, chock the wheels, and turn off the parking brakes.

The slack adjuster probably needs to be adjusted if it moves more than, about ___.When you pull hard on it. - Correct Answer-1 inch How should you check that the spring brakes come on when air pressure in the system drops below a certain level: - Correct Answer-Park on level ground, chock the wheel release parking brakes when you have enough air pressure, shut the engine off, quickly release and depressed the brake pedal.If your truck has a properly functioning dual air brake system with minimum size air tanks, the pressure should build from 85 to 100 P.S.I. in: - Correct Answer-45 sec

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