SJC CDLT 146 COMBINATION ACTUAL EXAM 2026-
2027 NEWEST EXAM WITH COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS\VERIFIED
100% ALREADY GRADED A+
Which of the following is NOT a way to tell if your trailer is equipped
with an antilock braking system (ABS)?
a) You can see wheel speed sensor wires coming from the back of the
brakes
b) It was built after March 1, 1998
c) The letters "ABS" are on the left side of the steering wheel
d) It has yellow ABS malfunction lamps
c) The letters "ABS" are on the left side of the steering wheel
To drive, how high do you need to raise the landing gear?
a) Part of the way up
b) Exactly 6 feet off the ground
c) Only slightly off the ground so that it will be easier to use later
d) All the way up
d) All the way up
,Which of the following is NOT part of inspecting the coupling?
a) Checking that the locking lever is in the correct ("lock") position
b) Driving a few feet to test that it is connected correctly
c) Checking that there is no space between the upper and lower fifth
wheel
d) Checking that the fifth wheel jaws have closed on the correct part of
the kingpin
b) Driving a few feet to test that it is connected correctly
After coupling, how much space should there be between the lower
and upper fifth wheel?
a) 1 foot
b) 24-36 inches
c) None
d) 5 feet
c) None
,While uncoupling, what should you do AFTER you unlock the fifth
wheel?
a) Lower your landing gear
b) Disconnect your air lines
c) Position your rig
d) Pull the tractor forward so that it is partially clear of the trailer
d) Pull the tractor forward so that it is partially clear of the trailer
Which of the following types of vehicle gets stuck on railroad crossings
most often?
a) Single-axle tractors pulling a long trailer with its landing gear set for a
tandem-axle tractor
b) Car carriers
c) Moving vans
d) All of the above
d) All of the above
, Which of the following could happen if you try to couple when the
trailer is too high?
a) It might not couple correctly
b) You could damage the trailer nose
c) The tractor might strike and damage the trailer
d) The tractor could roll away
a) It might not couple correctly
Which of the following is NOT part of checking that air is flowing to all
trailers?
a) Going to the rear of the rig
b) Pressing the pedal several times to lower the air pressure
c) Pushing in the red "trailer air supply" knob
d) Opening the emergency line shut-off valve
b) Pressing the pedal several times to lower the air pressure
2027 NEWEST EXAM WITH COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS\VERIFIED
100% ALREADY GRADED A+
Which of the following is NOT a way to tell if your trailer is equipped
with an antilock braking system (ABS)?
a) You can see wheel speed sensor wires coming from the back of the
brakes
b) It was built after March 1, 1998
c) The letters "ABS" are on the left side of the steering wheel
d) It has yellow ABS malfunction lamps
c) The letters "ABS" are on the left side of the steering wheel
To drive, how high do you need to raise the landing gear?
a) Part of the way up
b) Exactly 6 feet off the ground
c) Only slightly off the ground so that it will be easier to use later
d) All the way up
d) All the way up
,Which of the following is NOT part of inspecting the coupling?
a) Checking that the locking lever is in the correct ("lock") position
b) Driving a few feet to test that it is connected correctly
c) Checking that there is no space between the upper and lower fifth
wheel
d) Checking that the fifth wheel jaws have closed on the correct part of
the kingpin
b) Driving a few feet to test that it is connected correctly
After coupling, how much space should there be between the lower
and upper fifth wheel?
a) 1 foot
b) 24-36 inches
c) None
d) 5 feet
c) None
,While uncoupling, what should you do AFTER you unlock the fifth
wheel?
a) Lower your landing gear
b) Disconnect your air lines
c) Position your rig
d) Pull the tractor forward so that it is partially clear of the trailer
d) Pull the tractor forward so that it is partially clear of the trailer
Which of the following types of vehicle gets stuck on railroad crossings
most often?
a) Single-axle tractors pulling a long trailer with its landing gear set for a
tandem-axle tractor
b) Car carriers
c) Moving vans
d) All of the above
d) All of the above
, Which of the following could happen if you try to couple when the
trailer is too high?
a) It might not couple correctly
b) You could damage the trailer nose
c) The tractor might strike and damage the trailer
d) The tractor could roll away
a) It might not couple correctly
Which of the following is NOT part of checking that air is flowing to all
trailers?
a) Going to the rear of the rig
b) Pressing the pedal several times to lower the air pressure
c) Pushing in the red "trailer air supply" knob
d) Opening the emergency line shut-off valve
b) Pressing the pedal several times to lower the air pressure
