View instructions
Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The Kentucky doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The KY CDL doubles triples test covers the following sections of the Kentucky CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this KY CDL practice test now to prepare for the actual test!
1. The average driver has a reaction time of:
1/8 of a second.
1/16 of a second.
3/4 second to 1 second.
1/32 of a second.
2. During a walk around inspection of a combination vehicle, drivers should check that:
all locking pins are present and locked in place.
the glide plate is securely mounted to the trailer frame.
the locking jaws are around the shank.
All of the above.
3. ABS helps you:
decrease your overall stopping distance.
keep the wheels from locking up.
decrease your average speed.
lock your wheels.
4. Another name for front-end header boards is:
containerized racks.
head belt.
headache racks.
cargo stopper.
5. How should you brake if your vehicle loses ABS?
Step on and off the brake pedal several times
Pump the brake repeatedly
Brake as you always have.
Stay off the Brake
6. With an engine fire, you should:
not shoot foam from the vehicle’s underside.
turn the engine off as soon as possible.
open the hood as soon as possible.
All of the above.
7. If a load is placed on one side of the trailer:
your brakes won't work.
making turns may be easier.
the steering axle weight will be too light to steer safely.
a rollover is more likely.
8. When going down grades, you should:
downshift to a lower gear.
rely solely on engine braking to reduce your speed.
put the transmission in Neutral.
shift up.
9. 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.
downshift after your speed has already built up.
use a lower gear than would be required to go up the hill.
shift into neutral and coast.
10. Which of the following statements about retarders is NOT correct?
Retarders help you avoid skids.
Retarders help slow a vehicle, reducing the need for using brakes.
Retarders reduce reduce brake wear.
You should turn the retarder off whenever the road is wet, icy, or snow covered.
Page 1 of 2
Next page

KY Doubles Triples CDL Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Share This Online CDL Test
Rate this Doubles Triples CDL Test
4.8 out of 5
based on 102 votes