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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. If an aggressive driver is involved in an accident down the road, you should:
make eye contact with the driver.
try to get their vehicle to the side of the road.
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
confront the aggressive driver.
2. Having ABS on only the trailer:
still gives you more control over your vehicle during braking.
is very dangerous.
makes the trailer more likely to roll over.
makes the trailer more likely to swing out.
3. If your brakes get wet, it can cause them:
to apply unevenly.
to be weak.
to grab.
All of the above.
4. During a walk around inspection of a combination vehicle, drivers should check that:
the glide plate is securely mounted to the trailer frame.
the locking jaws are around the shank.
all locking pins are present and locked in place.
All of the above.
5. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:
the vehicle to slide back and forth.
the springs to put on the brakes.
the trailer emergency brakes to come on.
the trailer supply valve to open.
6. The front trailer supports are up, and the trailer is resting on the tractor. Make sure:
there is enough clearance between the top of the tractor tires and the nose of the trailer.
there is enough clearance between the rear of the tractor frame and the landing gear.
the electrical and air connections are properly connected between the tractor and the trailer.
All of the above.
7. Hydroplaning:
only happens when tire pressure is higher than normal.
can occur at speeds as low as 30 mph.
only occurs at extremely high speeds.
never occurs at speeds below 40 mph.
8. Which of the following is NOT part of inspecting the coupling?
Checking for enough clearance between the rear of the tractor frame and the landing gear.
Checking that the locking lever is in the "lock" position
Making sure there is no space between the upper and the lower fifth-wheel
Making sure the fifth-wheel jaws have closed around the shank of the kingpin.
9. The only way to stop a front-wheel skid is to:
let the vehicle slow down.
supply more power to the drive wheels.
All of the above.
10. If you're feeling tired while driving you should:
increase your speed to get to your destination quicker.
drink coffee.
stop driving and get some rest.
eat something.
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UT Combination Test

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