Florida CDL Combination Vehicles Exam
Questions And Answers
To back a trailer, what should you do? -
correct answer ✅Do all of the above
Which of the following is most likely to roll over? -
correct answer ✅The rear trailer of a triple
To straighten out a jackknifing trailer, should you apply the trailer
hand brake? -
correct answer ✅No, because the brakes on the trailer wheels
caused the skid to begin with
What does the trailer air supply control do? -
correct answer ✅By pushing it in, you supply the trailer with air.
Which of the following types of vehicles are more likely to get stuck
at a raised railroad crossing? -
correct answer ✅All of the above
When you check the lower fifth wheel during the coupling process,
you do NOT need to make sure -
correct answer ✅that the shut of valves are completely closed.
,Florida CDL Combination Vehicles Exam
Questions And Answers
During a walk-around inspection of a combination vehicle, you
should check to make sure that -
correct answer ✅all of the above are true.
What is the first step in coupling a tractor semi-trailer? -
correct answer ✅Inspect the fifth wheel.
Which of the following is NOT part of checking that air is flowing to
all trailers? -
correct answer ✅Pressing the pedal several times to lower the air
pressure
While uncoupling, what should you do AFTER you unlock the fifth
wheel? -
correct answer ✅Pull the tractor forward so that if is partially clear
of the trailer
What is the definition of "off-tracking?" -
correct answer ✅How the rear wheels follow a different path from
the front wheels in a turn
, Florida CDL Combination Vehicles Exam
Questions And Answers
Which of the following control the air service line? -
correct answer ✅Both the trailer and the foot brake
What is the best way to test the trailer service brakes? -
correct answer ✅Pull forward very slowly, then apply the trailer
brakes with your hand control
Where would you find the shut-off valves? -
correct answer ✅In the rear of the trailer
If you try to couple when the trailer is too high, -
correct answer ✅It may not couple properly
To drive, how high do you need to raise the landing gear? -
correct answer ✅All the way up
If you use the trailer hand valve while driving, -
correct answer ✅The trailer might skid
Which of the following is NOT part of inspecting the coupling? -
correct answer ✅Driving a few feet to test the coupling
Questions And Answers
To back a trailer, what should you do? -
correct answer ✅Do all of the above
Which of the following is most likely to roll over? -
correct answer ✅The rear trailer of a triple
To straighten out a jackknifing trailer, should you apply the trailer
hand brake? -
correct answer ✅No, because the brakes on the trailer wheels
caused the skid to begin with
What does the trailer air supply control do? -
correct answer ✅By pushing it in, you supply the trailer with air.
Which of the following types of vehicles are more likely to get stuck
at a raised railroad crossing? -
correct answer ✅All of the above
When you check the lower fifth wheel during the coupling process,
you do NOT need to make sure -
correct answer ✅that the shut of valves are completely closed.
,Florida CDL Combination Vehicles Exam
Questions And Answers
During a walk-around inspection of a combination vehicle, you
should check to make sure that -
correct answer ✅all of the above are true.
What is the first step in coupling a tractor semi-trailer? -
correct answer ✅Inspect the fifth wheel.
Which of the following is NOT part of checking that air is flowing to
all trailers? -
correct answer ✅Pressing the pedal several times to lower the air
pressure
While uncoupling, what should you do AFTER you unlock the fifth
wheel? -
correct answer ✅Pull the tractor forward so that if is partially clear
of the trailer
What is the definition of "off-tracking?" -
correct answer ✅How the rear wheels follow a different path from
the front wheels in a turn
, Florida CDL Combination Vehicles Exam
Questions And Answers
Which of the following control the air service line? -
correct answer ✅Both the trailer and the foot brake
What is the best way to test the trailer service brakes? -
correct answer ✅Pull forward very slowly, then apply the trailer
brakes with your hand control
Where would you find the shut-off valves? -
correct answer ✅In the rear of the trailer
If you try to couple when the trailer is too high, -
correct answer ✅It may not couple properly
To drive, how high do you need to raise the landing gear? -
correct answer ✅All the way up
If you use the trailer hand valve while driving, -
correct answer ✅The trailer might skid
Which of the following is NOT part of inspecting the coupling? -
correct answer ✅Driving a few feet to test the coupling
