This is our Louisiana Combination Vehicles Practice Quiz and Practice Test compiled of 20 questions each. Each question is worth five points for a total of 100 possible points. A passing score is 80%.
The Combination Vehicles Practice Quiz reveals the correct answer during each question to help you study for the actual Combination Vehicles exam. The Combination Vehicles Practice Test doesn’t reveal the correct answers until the test is over.
The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window. It’s that easy.
Press the start button to begin your free Combination Vehicles Practice Quiz. Good luck!
Combination Vehicles CDL Practice Quiz
Start
Congratulations! You have completed the Combination Vehicles CDL Practice Quiz. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
If you turn suddenly while pulling doubles, the ______ is twice as likely to ______ as the ______.
A
rear trailer, rollover, front trailer
B
rear trailer, jackknife, front trailer
C
front trailer, rollover, tractor
D
rear trailer, rollover, tractor
Question 2
______ causes the crack-the-whip effect.
A
Skidding
B
Rearward amplification
C
Jackknifing
D
Double clutching
Question 3
After coupling, there should be ______ space between the upper and lower fifth wheel.
A
no
B
less than 1/4 inch of
C
exactly 1/4 inch of
D
more than 1/4 inch of
Question 4
Compared to single commercial vehicles, combination vehicles are ______ and ______ and require ______.
A
shorter, lighter, the same amount of driving skills
B
longer, heavier, a class M CDL
C
shorter, lighter, a class A CDL
D
longer, heavier, more driving skill
Question 5
Why should you use chocks when parking a trailer without spring brakes?
A
Because eventually the air will leak out of the trailer air tank and there will be no brakes.
B
Because eventually the air will leak out of the trailer service line and there will be no brakes.
C
All of these are correct.
D
Because eventually the air will leak out of the trailer shut-off valve and there will be no brakes.
Question 6
To drive, you must raise the landing gear only until it just lifts off the ground. True or False?
A
False.
B
True.
Question 7
During a trailer ______, the ______ of a ______ lock up.
A
skid, axles, trailer
B
rollover, wheels, trailer
C
jackknife, brakes, trailer
D
jackknife, wheels, trailer
Question 8
When a tractor trailer goes around a corner, the rear wheels follow a different path than the front wheels. This is known as:
A
Cheating.
B
Neither of these are correct.
C
Offtracking.
D
Both of these are correct.
Question 9
You should never use the trailer hand valve when you are ______.
A
driving
B
Both of these are correct.
C
Neither of these are correct.
D
parking
Question 10
You should look into the rear of the fifth wheel to see if it is locked onto the kingpin. True or False?
A
False.
B
True.
Question 11
When you inspect the coupling, there should be no slack in the air lines. True or False?
A
True.
B
False.
Question 12
Before starting a 90 degree turn to the right, you should swing wide to the left. True or False?
A
True.
B
False.
Question 13
You are less likely to cause the trailer to ______ if you use the ______.
A
skid, foot brake
B
jackknife, trolley valve
C
roll over, trailer valve
D
jackknife, foot brake
Question 14
When you back a trailer, you should position your vehicle so you can back in a curved path to the driver’s side. True or False?
A
False.
B
True.
Question 15
The pin that locks the trailer to the tractor on the fifth wheel is called the ______.
A
coupling pin
B
kingpin
C
locking pin
D
dolly pin
Question 16
Which type of trailers can get stuck on raised railroad crossings?
A
Lowboy trailers.
B
All of these are correct.
C
Car carriers.
D
Moving vans.
Question 17
Why should you check the fifth wheel?
A
To make sure there is no damage or parts missing.
B
To see if the jaws are open.
C
All of these are correct.
D
To make sure it is properly greased.
Question 18
More than ______ percent of truck driver deaths in crashes are the result of ______.
A
twenty-five, rearward amplification
B
seventy-five, rollovers
C
fifty, rollovers
D
fifty, jackknifing
Question 19
You must make sure that all shut-off valves are in the ______ position except the ones at the ______ of the ______ trailer, which must be ______.
A
closed, front, first, open
B
open, rear, last, closed
C
closed, rear, last, open
D
open, front, first, closed
Question 20
To help prevent rollovers you should always ______ and ______.
A
keep cargo as close to the trailer's axles as possible, drive slowly around turns
B
keep the cargo as close to the ground as possible, drive slowly around turns
C
keep the cargo as close to the ground as possible, brake smoothly as you drive around turns
D
keep cargo as close to the trailer's axles as possible, brake smoothly as you drive around turns
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 20 questions to complete.
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Question Details
Results
Date
Score
Hint
Time allowed
minutes
seconds
Time used
Answer Choice(s) Selected
Question Text
All done
"Dude, Go Back to Truck Driving School" because you FAILED!
"A Bad Truck Driver" because you FAILED!
"An Amateur Truck Driver" because you FAILED!
"A Good Truck Driver" because you PASSED!
"A Truck Driving Pro" because you PASSED!
Remember, the Combination Vehicles Practice Test doesn’t reveal the correct answers until the test is over. The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window.
Press the start button to begin your free Combination Vehicles Practice Test. Good luck!
Combination Vehicles CDL Practice Test
Start
Congratulations! You have completed the Combination Vehicles CDL Practice Test. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
You should never use the trailer hand valve when you are ______.
A
driving
B
Neither of these are correct.
C
parking
D
Both of these are correct.
Question 2
Which type of trailers can get stuck on raised railroad crossings?
A
Lowboy trailers.
B
Car carriers.
C
Moving vans.
D
All of these are correct.
Question 3
When you inspect the coupling, there should be no slack in the air lines. True or False?
A
True.
B
False.
Question 4
Why should you use chocks when parking a trailer without spring brakes?
A
Because eventually the air will leak out of the trailer service line and there will be no brakes.
B
Because eventually the air will leak out of the trailer shut-off valve and there will be no brakes.
C
Because eventually the air will leak out of the trailer air tank and there will be no brakes.
D
All of these are correct.
Question 5
To drive, you must raise the landing gear only until it just lifts off the ground. True or False?
A
True.
B
False.
Question 6
Compared to single commercial vehicles, combination vehicles are ______ and ______ and require ______.
A
shorter, lighter, the same amount of driving skills
B
longer, heavier, a class M CDL
C
longer, heavier, more driving skill
D
shorter, lighter, a class A CDL
Question 7
When a tractor trailer goes around a corner, the rear wheels follow a different path than the front wheels. This is known as:
A
Offtracking.
B
Cheating.
C
Neither of these are correct.
D
Both of these are correct.
Question 8
Why should you check the fifth wheel?
A
To see if the jaws are open.
B
All of these are correct.
C
To make sure there is no damage or parts missing.
D
To make sure it is properly greased.
Question 9
The pin that locks the trailer to the tractor on the fifth wheel is called the ______.
A
locking pin
B
dolly pin
C
coupling pin
D
kingpin
Question 10
During a trailer ______, the ______ of a ______ lock up.
A
jackknife, wheels, trailer
B
jackknife, brakes, trailer
C
skid, axles, trailer
D
rollover, wheels, trailer
Question 11
After coupling, there should be ______ space between the upper and lower fifth wheel.
A
exactly 1/4 inch of
B
more than 1/4 inch of
C
no
D
less than 1/4 inch of
Question 12
You should look into the rear of the fifth wheel to see if it is locked onto the kingpin. True or False?
A
False.
B
True.
Question 13
If you turn suddenly while pulling doubles, the ______ is twice as likely to ______ as the ______.
A
rear trailer, rollover, tractor
B
rear trailer, jackknife, front trailer
C
front trailer, rollover, tractor
D
rear trailer, rollover, front trailer
Question 14
To help prevent rollovers you should always ______ and ______.
A
keep cargo as close to the trailer's axles as possible, brake smoothly as you drive around turns
B
keep the cargo as close to the ground as possible, drive slowly around turns
C
keep the cargo as close to the ground as possible, brake smoothly as you drive around turns
D
keep cargo as close to the trailer's axles as possible, drive slowly around turns
Question 15
When you back a trailer, you should position your vehicle so you can back in a curved path to the driver’s side. True or False?
A
True.
B
False.
Question 16
You are less likely to cause the trailer to ______ if you use the ______.
A
roll over, trailer valve
B
skid, foot brake
C
jackknife, trolley valve
D
jackknife, foot brake
Question 17
Before starting a 90 degree turn to the right, you should swing wide to the left. True or False?
A
True.
B
False.
Question 18
More than ______ percent of truck driver deaths in crashes are the result of ______.
A
twenty-five, rearward amplification
B
fifty, jackknifing
C
fifty, rollovers
D
seventy-five, rollovers
Question 19
______ causes the crack-the-whip effect.
A
Jackknifing
B
Rearward amplification
C
Double clutching
D
Skidding
Question 20
You must make sure that all shut-off valves are in the ______ position except the ones at the ______ of the ______ trailer, which must be ______.
A
open, rear, last, closed
B
closed, rear, last, open
C
open, front, first, closed
D
closed, front, first, open
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 20 questions to complete.
←
List
→
Return
Shaded items are complete.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
End
Return
You have completed
questions
question
Your score is
Correct
Wrong
Partial-Credit
You have not finished your quiz. If you leave this page, your progress will be lost.
Correct Answer
You Selected
Not Attempted
Final Score on Quiz
Attempted Questions Correct
Attempted Questions Wrong
Questions Not Attempted
Total Questions on Quiz
Question Details
Results
Date
Score
Hint
Time allowed
minutes
seconds
Time used
Answer Choice(s) Selected
Question Text
All done
"Dude, Go Back to Truck Driving School" because you FAILED!
