CDL COMBINATION VEHICLE PRACTICE
TEST EXAM SCRIPT 2026 FULL SOLUTIONS
AND CORRECT ANSWERS GRADED A+
⩥ Go slow around turns. Answer: There two things that driver can do to
prevent a rollover. They are :(1) keep the cargo as close to the ground as
possible; and (2):
⩥ Low gear Answer: After you have coupled the trailer you should have
to raise the landing gear by using:
⩥ Pushing in the trailer air supply valve . Answer: You supply air to the
trailers tanks by:
⩥ 3 psi per minute Answer: The air brake leakage for a combination
vehicle (engine off,brakes off) should be less than ____ psi per minute.
⩥ You should turn wide as you complete the turn. Answer: The safest
way to make turn without entering another traffic lane is:
⩥ Easier to turn over . Answer: The higher the center of gravity of your
truck,the:
, ⩥ Nothing is likely to happen until you try to apply the brakes. Answer:
If the service line comes apart while you are driving a combination
vehicle but the emergency line stays together, what will happen right
away?
⩥ Service and emergency air lines from the vehicle to the trailer.
Answer: Glad hands are usually connecting which of these?
⩥ If the trailer has no spring brakes , you could drive away but you
wouldn't have trailer brakes. Answer: A driver crosses the air lines when
hooking up to an old trailer. What will happen?
⩥ To test the trailer brakes. Answer: The hand valve should be used:
⩥ Back section Answer: When driving a set of doubles it is necessary to
close which shut-off valve in the last trailer .
⩥ Trailer will be lifted slightly when the tractor backs under it. Answer:
You are about to back your tractor under a semitrailer. The trailer is at
the right height when the :
⩥ Emergency trailer brakes to come on. Answer: Your emergency air
line breaks or gets pulled apart while you are driving. The loss of
pressure will cause the:
TEST EXAM SCRIPT 2026 FULL SOLUTIONS
AND CORRECT ANSWERS GRADED A+
⩥ Go slow around turns. Answer: There two things that driver can do to
prevent a rollover. They are :(1) keep the cargo as close to the ground as
possible; and (2):
⩥ Low gear Answer: After you have coupled the trailer you should have
to raise the landing gear by using:
⩥ Pushing in the trailer air supply valve . Answer: You supply air to the
trailers tanks by:
⩥ 3 psi per minute Answer: The air brake leakage for a combination
vehicle (engine off,brakes off) should be less than ____ psi per minute.
⩥ You should turn wide as you complete the turn. Answer: The safest
way to make turn without entering another traffic lane is:
⩥ Easier to turn over . Answer: The higher the center of gravity of your
truck,the:
, ⩥ Nothing is likely to happen until you try to apply the brakes. Answer:
If the service line comes apart while you are driving a combination
vehicle but the emergency line stays together, what will happen right
away?
⩥ Service and emergency air lines from the vehicle to the trailer.
Answer: Glad hands are usually connecting which of these?
⩥ If the trailer has no spring brakes , you could drive away but you
wouldn't have trailer brakes. Answer: A driver crosses the air lines when
hooking up to an old trailer. What will happen?
⩥ To test the trailer brakes. Answer: The hand valve should be used:
⩥ Back section Answer: When driving a set of doubles it is necessary to
close which shut-off valve in the last trailer .
⩥ Trailer will be lifted slightly when the tractor backs under it. Answer:
You are about to back your tractor under a semitrailer. The trailer is at
the right height when the :
⩥ Emergency trailer brakes to come on. Answer: Your emergency air
line breaks or gets pulled apart while you are driving. The loss of
pressure will cause the:
