NC CDL COMBINATION VEHICLES EXAM
SCRIPT 2026 FULL QUESTIONS AND ANSWERS
ALREADY PASSED
◉ You have coupled with a semi trailer. In what position should you
put the landing gear before driving away? Answer: Fully raised with
the crank handle secured in its bracket.
◉ When uncoupling, what could happen if you park the trailer at an
angle? Answer: You could do damage to the landing gear and dolly
legs.
◉ Why should you lock the tractor glad hands together or couple
them to the dummy glad hands when bobtailing? Answer: It will
keep dirt and water out of the lines.
◉ When backing under a trailer, you should expect the trailer to be
lifted slightly by the fifth wheel plate. Answer: True.
◉ Before you begin coupling, you should check your travel path for
obstacles and hazards. Answer: True.
, ◉ What should your air supply pressure gauge read before backing
under a trailer? Answer: 100 - 125 psi.
◉ In case of a jackknife situation, you can use your trailer hand valve
to apply trailer brakes to stop the trailer from skidding. Answer:
False.
◉ Which knob do you actuate to supply air to your trailer? Answer:
Push in on the tractor protection valve knob, which is the red knob.
◉ Do combination vehicles take longer to stop when they are empty
or loaded? Answer: When they are empty.
◉ What three things do you check after coupling to a trailer?
Answer: Check that there is no gap between the fifth wheel plate and
the trailer apron, check that the release handle is all the way in and
latched, and check with a flashlight that the fifth wheel jaws have
locked around the kingpin.
◉ Bobtail tractors will stop shorter than a combination vehicle
loaded to maximum gross weight. Answer: False.
◉ If you back under a trailer at an angle rather than from straight
on, you could damage the landing gear. Answer: True.
SCRIPT 2026 FULL QUESTIONS AND ANSWERS
ALREADY PASSED
◉ You have coupled with a semi trailer. In what position should you
put the landing gear before driving away? Answer: Fully raised with
the crank handle secured in its bracket.
◉ When uncoupling, what could happen if you park the trailer at an
angle? Answer: You could do damage to the landing gear and dolly
legs.
◉ Why should you lock the tractor glad hands together or couple
them to the dummy glad hands when bobtailing? Answer: It will
keep dirt and water out of the lines.
◉ When backing under a trailer, you should expect the trailer to be
lifted slightly by the fifth wheel plate. Answer: True.
◉ Before you begin coupling, you should check your travel path for
obstacles and hazards. Answer: True.
, ◉ What should your air supply pressure gauge read before backing
under a trailer? Answer: 100 - 125 psi.
◉ In case of a jackknife situation, you can use your trailer hand valve
to apply trailer brakes to stop the trailer from skidding. Answer:
False.
◉ Which knob do you actuate to supply air to your trailer? Answer:
Push in on the tractor protection valve knob, which is the red knob.
◉ Do combination vehicles take longer to stop when they are empty
or loaded? Answer: When they are empty.
◉ What three things do you check after coupling to a trailer?
Answer: Check that there is no gap between the fifth wheel plate and
the trailer apron, check that the release handle is all the way in and
latched, and check with a flashlight that the fifth wheel jaws have
locked around the kingpin.
◉ Bobtail tractors will stop shorter than a combination vehicle
loaded to maximum gross weight. Answer: False.
◉ If you back under a trailer at an angle rather than from straight
on, you could damage the landing gear. Answer: True.
