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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Kentucky 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 Kentucky CDL Manual. Take this practice test now to prepare for the actual KY CDL combination test!
1. Tar in the road pavement rising to the road surface in very hot weather:
does not affect the road surface or driving conditions.
is very sticky and will slow down your vehicle.
might get in your engine.
causes the road to become very slippery.
2. When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.
no space
enough space
about 1/2 inch
about 1 inch
3. You are driving a modern truck with a manual transmission. When going down a hill you should usually:
use the same gear you would use to go up the hill.
use a lower gear than would be required to go up the hill.
downshift after your speed has already built up.
shift into neutral and coast.
4. The trailer hand valve should:
be used in driving.
never be used for parking.
never be used to test the trailer brakes.
All of the above.
5. If your trailer starts to skid, you should:
use the trailer hand brake (if you have one) to straighten out the rig.
release the brakes to get traction back.
accelerate slightly.
keep the rear of your vehicle close to the curb.
6. When backing a truck you should:
back and turn toward the right side.
get out and walk around the vehicle before you begin to back.
look straight ahead.
always rely on your mirrors.
7. Which of the following is not a reason for covering cargo?
To protect people from spilled cargo
To protect the cargo from weather
To prevent other drivers from looking at the cargo
All of the above.
8. When the ______ closes, it stops any air from going out of the tractor.
height control valve
hand valve
tractor protection valve
alcohol evaporator
9. Which of the following is most likely to roll over?
The middle trailer of a triple
The front trailer of a double
The rear trailer of a double
The rear trailer of a triple
10. It's very important to distribute the cargo so it is:
piled up.
in the centre of the load.
as high up as possible.
as low as possible.
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KY CDL Combination Test

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