CDL DOUBLES TRIPLES ENDORSEMENT
CERTIFICATION EVALUATION SET 2026
PRACTICE QUESTIONS SOLUTIONS
VERIFIED
● You are driving with double trailers and must use your brakes to avoid
a crash. for emergency braking, you should:
A. Use only the trailer brakes.
B. Use light, steady pressure on the brake pedal.
C. Use controlled or stab braking. Answer: C. Use controlled or stab
braking.
● Which of these statements about emergency steering is true?
A. If you have traffic on both sides of your vehicle and something is
blocking your lane, a move to the right is still the best choice.
B. You can almost always stop more quickly than you can turn.
C. You can. steer more quickly and safely if you hold the wheel with one
hand. Answer: A. If you have traffic on both sides of your vehicle and
something is blocking your lane, a move to the right is still the best
choice.
, ● The converter dolly air tank drain valve on coupled double/triple
trailers should be:
A. Closed
B. Open
C. Partially open Answer: A. Closed
● To check if the converter dolly is securely coupled to the rear trailer,
you should:
A. Backup slightly and make the visual check of the coupling.
B. Release spring brakes and check the movement
C. Pull gently against the pin of the second trailer. Answer: C. Pull
gently against the pin of the second trailer.
● You are visually checking the coupling of a converter dolly to the rear
trailer. How much space should be between the upper and lower fifth
wheel?
A. None.
B. It depends on the load.
C. 1/2 to 3/4 inch. Answer: A. None.
CERTIFICATION EVALUATION SET 2026
PRACTICE QUESTIONS SOLUTIONS
VERIFIED
● You are driving with double trailers and must use your brakes to avoid
a crash. for emergency braking, you should:
A. Use only the trailer brakes.
B. Use light, steady pressure on the brake pedal.
C. Use controlled or stab braking. Answer: C. Use controlled or stab
braking.
● Which of these statements about emergency steering is true?
A. If you have traffic on both sides of your vehicle and something is
blocking your lane, a move to the right is still the best choice.
B. You can almost always stop more quickly than you can turn.
C. You can. steer more quickly and safely if you hold the wheel with one
hand. Answer: A. If you have traffic on both sides of your vehicle and
something is blocking your lane, a move to the right is still the best
choice.
, ● The converter dolly air tank drain valve on coupled double/triple
trailers should be:
A. Closed
B. Open
C. Partially open Answer: A. Closed
● To check if the converter dolly is securely coupled to the rear trailer,
you should:
A. Backup slightly and make the visual check of the coupling.
B. Release spring brakes and check the movement
C. Pull gently against the pin of the second trailer. Answer: C. Pull
gently against the pin of the second trailer.
● You are visually checking the coupling of a converter dolly to the rear
trailer. How much space should be between the upper and lower fifth
wheel?
A. None.
B. It depends on the load.
C. 1/2 to 3/4 inch. Answer: A. None.
