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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Utah CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Utah CDL Manual. Take this practice test now to prepare for the actual UT CDL combination test!
1. The two most important thingsĀ that a driver can do to prevent a rollover when driving a combination vehicle are:
Keeping cargo near the center of the vehicle and driving slowly on turns
Keeping cargo near the ground and driving slowly on the highway
Driving slowly around turns and keeping the cargo as close to the ground as possible
Keeping cargo near center of vehicle and driving slowly on the highway
2. Which of the following is NOT part of testingĀ the tractor protection valve?
Charging the trailer air brake system.
Shutting off the engine.
Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
Pulling forward slowly, then applying the trailer brakes.
3. Which of these is NOT part of the basic method for shifting up?
Accelerate while pressing the clutch and turn toward the driver's side.
Push in the clutch and shift to the higher gear at the same time.
Release the accelerator, push in the clutch and shift to neutral at the same time.
Release the clutch and press the accelerator at the same time.
4. Converter dollies and trailers built before 1975:
are required to have spring brakes.
typically have 2 parking brakes.
are required to have ABS.
are not required to have spring brakes.
5. The emergency air line does NOT:
supply air to the trailer air tanks.
cause the tractor protection valve to close when the emergency line loses pressure.
control the emergency brakes on combination vehicles.
pump air into the relay valves, allowing the trailer brakes to be applied more quickly.
6. When should you use the hand valve to park a combination vehicle?
To park at loading docks.
When parking downhill.
7. If your cargo only fills one-third of the length of your trailer, make sure your cargo is:
loaded so there is a high center of gravity.
to one side and as close to the ground as possible.
piled up high with heavy cargo on top.
centered and spread out as much as possible.
8. After starting the engine, oil pressure should rise to a normal level:
within 6 minutes.
within 2 minutes.
within 3 miles.
within seconds.
9. If a vehicle is equipped with ABS, when you start the engine:
the trailer emergency brakes will come on.
the ABS indicator light on the dash should come on and then turn off.
the wheels will lock up.
the spring brakes will come on.
10. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
20 miles
25 miles
two hours
50 miles
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UT CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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