Missouri Doubles and Triples Endorsement Practice Test
Missouri Doubles and Triples Endorsement Practice Test
This is our Missouri Doubles and Triples Endorsement 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 Doubles and Triples Endorsement Practice Quiz reveals the correct answer during each question to help you study for the actual Doubles and Triples Endorsement exam. The Doubles and Triples Endorsement 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 Doubles and Triples Endorsement Practice Quiz. Good luck!
Doubles and Triples CDL Practice Quiz
Start
Congratulations! You have completed the Doubles and Triples CDL Practice Quiz. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
When testing the tractor protection valve, ______ the air pressure to ______ psi and the valve should close automatically.
A
reduce, 60
B
increase, 100
C
increase, 20 to 45
D
reduce, 20 to 45
Question 2
You should always inspect a converter dolly as if it were:
A
a motor
B
an axle with a fifth wheel
C
hazardous material
D
a trailer
Question 3
On a triple trailer, there is no way to check if the entire brake system is charged. True or False?
A
True
B
False
Question 4
All converter dollies are equipped with spring brakes. True or False?
A
False
B
True
Question 5
You can prevent ______ by making sure your load is ______.
A
rollovers, over the drive wheels of the tractor
B
jackknifing, low and centered between the trailer sides
C
jackknifing, low and toward the left or drive side
D
rollovers, low and centered between the trailer sides
Question 6
Whenever possible, you should always ______ when parking a double triple trailer.
A
look for double/triple trailer parking spots
B
circle and scan the layout of the lot first
C
make sure that you are at least eight feet from the nearest tractor trailer on either side
D
park in a spot that allows you to pull through
Question 7
Regarding shutoff valves in double/triple trailers, the valves in the ______ of the ______ trailer should be ______.
A
rear, front, open
B
rear, front, closed
C
front, rear, closed
D
front, rear, open
Question 8
A converter dolly may have its own ______.
A
air tank
B
braking system
C
engine
D
hydraulic system
Question 9
On trailers used as doubles and triples, you'll find ______ in the ______.
A
shut off valves, emergency lines only
B
spring valves, service and emergency lines
C
shut off valves, service and emergency air lines
D
shut off valves, service air lines only
Question 10
Triple trailers have the most rearward amplification. True or False?
A
False
B
True
Question 11
When you turn a corner, it is normal for your trailer wheels to follow a different path than your tractor wheels. True or False?
A
True
B
False
Question 12
When driving a double/triple trailer, steering gently helps to prevent the ______ effect.
A
fishtail
B
cat tail
C
crack-the-whip
D
dog tail
Question 13
When pulling triple trailers, the ______ is the most likely to roll over.
A
first trailer
B
middle trailer
C
tractor
D
last trailer
Question 14
When inspecting the converter dolly, always make sure the ______ is ______.
A
glad hands, closed
B
glad hands, open
C
air tank drain valve, open
D
air tank drain valve, closed
Question 15
When driving a double/triple trailer, the ______ load should be placed in the ______.
A
heavier, first
B
Neither of these are correct.
C
Both of these are correct.
D
lighter, rear
Question 16
When coupling the rear trailer, the correct trailer height is ______ the ______.
A
the same as, fifth wheel
B
higher than, fifth wheel
C
lower than, fifth wheel
D
All of these are correct.
Question 17
When uncoupling double trailers you should:
A
chock the wheels first.
B
park on a slight downgrade.
C
park on a slight incline.
D
park on level ground.
Question 18
Converter dollies equipped with anti-lock brakes will have a ______ lamp on the ______ side of the dolly.
A
orange, left
B
yellow, left
C
orange, right
D
yellow, right
Question 19
When pulling triple trailers, you should always put the ______ trailer in the ______.
A
heaviest, rear
B
heaviest, middle
C
lightest, front
D
heaviest, front
Question 20
When coupling, the first step is to:
A
shift the transmission into reverse.
B
connect the air supply lines.
C
apply the trailer brakes.
D
raise the landing gear.
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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seconds
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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 Doubles and Triples Endorsement 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 Doubles and Triples Endorsement Practice Test. Good luck!
Doubles and Triples CDL Practice Test
Start
Congratulations! You have completed the Doubles and Triples CDL Practice Test. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
When inspecting the converter dolly, always make sure the ______ is ______.
A
air tank drain valve, open
B
air tank drain valve, closed
C
glad hands, open
D
glad hands, closed
Question 2
When you turn a corner, it is normal for your trailer wheels to follow a different path than your tractor wheels. True or False?
A
True
B
False
Question 3
When driving a double/triple trailer, steering gently helps to prevent the ______ effect.
A
dog tail
B
cat tail
C
crack-the-whip
D
fishtail
Question 4
You can prevent ______ by making sure your load is ______.
A
jackknifing, low and toward the left or drive side
B
rollovers, over the drive wheels of the tractor
C
jackknifing, low and centered between the trailer sides
D
rollovers, low and centered between the trailer sides
Question 5
Triple trailers have the most rearward amplification. True or False?
A
False
B
True
Question 6
When uncoupling double trailers you should:
A
park on a slight incline.
B
park on level ground.
C
park on a slight downgrade.
D
chock the wheels first.
Question 7
On a triple trailer, there is no way to check if the entire brake system is charged. True or False?
A
False
B
True
Question 8
When coupling the rear trailer, the correct trailer height is ______ the ______.
A
lower than, fifth wheel
B
higher than, fifth wheel
C
All of these are correct.
D
the same as, fifth wheel
Question 9
When pulling triple trailers, the ______ is the most likely to roll over.
A
first trailer
B
middle trailer
C
last trailer
D
tractor
Question 10
Converter dollies equipped with anti-lock brakes will have a ______ lamp on the ______ side of the dolly.
A
orange, left
B
orange, right
C
yellow, left
D
yellow, right
Question 11
A converter dolly may have its own ______.
A
air tank
B
hydraulic system
C
braking system
D
engine
Question 12
When coupling, the first step is to:
A
shift the transmission into reverse.
B
connect the air supply lines.
C
raise the landing gear.
D
apply the trailer brakes.
Question 13
When pulling triple trailers, you should always put the ______ trailer in the ______.
A
lightest, front
B
heaviest, rear
C
heaviest, front
D
heaviest, middle
Question 14
Whenever possible, you should always ______ when parking a double triple trailer.
A
make sure that you are at least eight feet from the nearest tractor trailer on either side
B
circle and scan the layout of the lot first
C
park in a spot that allows you to pull through
D
look for double/triple trailer parking spots
Question 15
On trailers used as doubles and triples, you'll find ______ in the ______.
A
shut off valves, service and emergency air lines
B
spring valves, service and emergency lines
C
shut off valves, emergency lines only
D
shut off valves, service air lines only
Question 16
Regarding shutoff valves in double/triple trailers, the valves in the ______ of the ______ trailer should be ______.
A
front, rear, open
B
front, rear, closed
C
rear, front, closed
D
rear, front, open
Question 17
When testing the tractor protection valve, ______ the air pressure to ______ psi and the valve should close automatically.
A
increase, 20 to 45
B
reduce, 20 to 45
C
reduce, 60
D
increase, 100
Question 18
When driving a double/triple trailer, the ______ load should be placed in the ______.
A
heavier, first
B
Neither of these are correct.
C
Both of these are correct.
D
lighter, rear
Question 19
You should always inspect a converter dolly as if it were:
A
a trailer
B
an axle with a fifth wheel
C
a motor
D
hazardous material
Question 20
All converter dollies are equipped with spring brakes. True or False?
A
True
B
Fasle
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!
