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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. The proper following distance for a 60-foot vehicle traveling at 50 mph is:
7 seconds
4 seconds
6 seconds
8 seconds
2. A truck tractor with _________ requires the shortest stopping distance.
Weight has no impact on stopping distance.
an empty trailer
a lightly loaded trailer
a fully loaded trailer
3. If you begin to feel drowsy while driving, you should:
open your window.
get an energy drink.
get some coffee.
pull off the road and get some rest.
4. During a trip you need to inspect the cargo and its securing devices:
every 3 hours or 150 miles.
within the first 50 miles after beginning a trip.
after every break you take.
All of the above.
5. Which of these statements about brakes is true?
Brake fade does not result from excessive heat.
The lighter the vehicle, the more heat the brakes absorb to stop it.
To stop, the brake shoes and linings are pushed against the outside of the drum.
None of the above.
6. Under-loaded front axles can:
cause poor traction.
cause the drive wheels to spin easily.
make the steering axle weight too light to steer safely.
All of the above.
7. If the drive wheels start to skid:
use the brakes to slow down.
accelerate slightly to regain control.
push in the clutch to let them turn freely.
All of the above.
8. Overloading can have negative effects on:
speed control.
All of the above.
9. Enough tread is especially important in winter conditions. You need at least ________ tread depth on steering axle tires.
2/8 inch
4/32 inch
6/24 inch
8/32 inch
10. To prevent rollover, you should:
go slowly around turns.
keep the cargo as close to the ground as possible.
drive slowly around on ramps and off ramps.
All of the above.
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KY CDL Combination Test

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