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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 Utah CDL knowledge test. The UT 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 Utah CDL Manual. Take this UT CDL practice test now to prepare for the actual air brakes test!
1. Air brakes:
are an effective way to stop large and heavy vehicles.
are prohibited on larger vehicles.
should be used only when driving on wet roads.
can improve fuel efficiency.
2. In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
3. Most heavy vehicles require ________ change gears.
double shifting
single clutching
double clutching
triple shifting
4. The air tanks should be drained completely to remove:
carbon monoxide.
the radiator cap.
water and oil.
5. If your truck catches fire, the first thing you should do is to:
pull off the road and park in an open area.
get off the vehicle, open the hood and start shooting foamĀ to keep the engine cool.
pull into a service station and call for help.
get the vehicle off the road and park near other vehicles.
6. Your truck has a dual air system. If either system is very low on pressure:
the tractor protection valve will not work properly.
the ABS will not work properly.
either the front or the rear brake will not be fully operational.
the low pressure warning signal will stop working.
7. ABS malfunction lamps are located:
on the driver'door.
under the hood.
on the instrument panel.
None of the above.
8. If you are feeling sleepy, you should:
slow down.
drive faster.
get some coffee.
pull off the road and rest.
9. How do you test hydraulic brakes for leaks?
Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
Pump the brake pedal ten times and see if it holds.
Pull forward against parking brake to make sure the hydraulic brakes holds.
None of the above.
10. You should always try to back toward the driver's side because:
backing toward the left side is more dangerous.
you can watch the rear of your vehicle out the side window.
you can more easily correct any steering errors.
None of the above.
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UT Air Brakes CDL Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
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