Texas Combination Vehicles Practice Test

This is our Texas 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

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Congratulations! You have completed the Combination Vehicles CDL Practice Quiz. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%% Pass your Combination Vehicles Knowledge Exam the first time! Click here to get the Complete CDL Cheat Sheet Study Package for all 50 states!

Your answers are highlighted below.

Question 1

Why should you check the fifth wheel?

A	All of these are correct.
B	To make sure it is properly greased.
C	To see if the jaws are open.
D	To make sure there is no damage or parts missing.

Question 2

If you turn suddenly while pulling doubles, the ______ is twice as likely to ______ as the ______.

A	rear trailer, rollover, tractor
B	front trailer, rollover, tractor
C	rear trailer, jackknife, front trailer
D	rear trailer, rollover, front trailer

Question 3

To help prevent rollovers you should always ______ and ______.

A	keep the cargo as close to the ground as possible, brake smoothly as you drive around turns
B	keep cargo as close to the trailer's axles as possible, drive slowly around turns
C	keep cargo as close to the trailer's axles as possible, brake smoothly as you drive around turns
D	keep the cargo as close to the ground as possible, drive slowly around turns

Question 4

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, rear, last, open
B	open, front, first, closed
C	closed, front, first, open
D	open, rear, last, closed

Question 5

You should never use the trailer hand valve when you are ______.

A	Neither of these are correct.
B	Both of these are correct.
C	driving
D	parking

Question 6

The pin that locks the trailer to the tractor on the fifth wheel is called the ______.

A	coupling pin
B	locking pin
C	dolly pin
D	kingpin

Question 7

More than ______ percent of truck driver deaths in crashes are the result of ______.

A	twenty-five, rearward amplification
B	fifty, jackknifing
C	seventy-five, rollovers
D	fifty, rollovers

Question 8

Before starting a 90 degree turn to the right, you should swing wide to the left. True or False?

A	False.
B	True.

Question 9

Compared to single commercial vehicles, combination vehicles are ______ and ______ and require ______.

A	longer, heavier, a class M CDL
B	longer, heavier, more driving skill
C	shorter, lighter, the same amount of driving skills
D	shorter, lighter, a class A CDL

Question 10

After coupling, there should be ______ space between the upper and lower fifth wheel.

A	no
B	more than 1/4 inch of
C	exactly 1/4 inch of
D	less than 1/4 inch of

Question 11

When you inspect the coupling, there should be no slack in the air lines. True or False?

A	False.
B	True.

Question 12

During a trailer ______, the ______ of a ______ lock up.

A	skid, axles, trailer
B	jackknife, wheels, trailer
C	jackknife, brakes, trailer
D	rollover, wheels, trailer

Question 13

______ causes the crack-the-whip effect.

A	Jackknifing
B	Double clutching
C	Skidding
D	Rearward amplification

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	True.
B	False.

Question 15

Why should you use chocks when parking a trailer without spring brakes?

A	Because eventually the air will leak out of the trailer shut-off valve and there will be no brakes.
B	All of these are correct.
C	Because eventually the air will leak out of the trailer air tank and there will be no brakes.
D	Because eventually the air will leak out of the trailer service line and there will be no brakes.

Question 16

When a tractor trailer goes around a corner, the rear wheels follow a different path than the front wheels. This is known as:

A	Both of these are correct.
B	Neither of these are correct.
C	Cheating.
D	Offtracking.

Question 17

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 18

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 19

To drive, you must raise the landing gear only until it just lifts off the ground. True or False?

A	False.
B	True.

Question 20

Which type of trailers can get stuck on raised railroad crossings?

A	Car carriers.
B	Lowboy trailers.
C	All of these are correct.
D	Moving vans.

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

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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

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

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Congratulations! You have completed the Combination Vehicles CDL Practice Test. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%% Pass your Combination Vehicles Knowledge Exam the first time! Click here to get the Complete CDL Cheat Sheet Study Package for all 50 states!

Your answers are highlighted below.

Question 1

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 2

When a tractor trailer goes around a corner, the rear wheels follow a different path than the front wheels. This is known as:

A	Neither of these are correct.
B	Offtracking.
C	Cheating.
D	Both of these are correct.

Question 3

Why should you use chocks when parking a trailer without spring brakes?

A	Because eventually the air will leak out of the trailer shut-off valve and there will be no brakes.
B	Because eventually the air will leak out of the trailer air tank and there will be no brakes.
C	All of these are correct.
D	Because eventually the air will leak out of the trailer service line and there will be no brakes.

Question 4

______ causes the crack-the-whip effect.

A	Double clutching
B	Skidding
C	Jackknifing
D	Rearward amplification

Question 5

During a trailer ______, the ______ of a ______ lock up.

A	skid, axles, trailer
B	jackknife, brakes, trailer
C	jackknife, wheels, trailer
D	rollover, wheels, trailer

Question 6

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 7

After coupling, there should be ______ space between the upper and lower fifth wheel.

A	less than 1/4 inch of
B	more than 1/4 inch of
C	exactly 1/4 inch of
D	no

Question 8

Which type of trailers can get stuck on raised railroad crossings?

A	Car carriers.
B	Lowboy trailers.
C	All of these are correct.
D	Moving vans.

Question 9

The pin that locks the trailer to the tractor on the fifth wheel is called the ______.

A	kingpin
B	locking pin
C	dolly pin
D	coupling pin

Question 10

If you turn suddenly while pulling doubles, the ______ is twice as likely to ______ as the ______.

A	rear trailer, jackknife, front trailer
B	rear trailer, rollover, front trailer
C	front trailer, rollover, tractor
D	rear trailer, rollover, tractor

Question 11

You should never use the trailer hand valve when you are ______.

A	parking
B	Both of these are correct.
C	driving
D	Neither of these are correct.

Question 12

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 13

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	closed, front, first, open
D	open, front, first, closed

Question 14

To drive, you must raise the landing gear only until it just lifts off the ground. True or False?

A	True.
B	False.

Question 15

You are less likely to cause the trailer to ______ if you use the ______.

A	skid, foot brake
B	roll over, trailer valve
C	jackknife, trolley valve
D	jackknife, foot brake

Question 16

Compared to single commercial vehicles, combination vehicles are ______ and ______ and require ______.

A	shorter, lighter, the same amount of driving skills
B	shorter, lighter, a class A CDL
C	longer, heavier, a class M CDL
D	longer, heavier, more driving skill

Question 17

Before starting a 90 degree turn to the right, you should swing wide to the left. True or False?

A	False.
B	True.

Question 18

When you inspect the coupling, there should be no slack in the air lines. True or False?

A	False.
B	True.

Question 19

Why should you check the fifth wheel?

A	To make sure it is properly greased.
B	To make sure there is no damage or parts missing.
C	To see if the jaws are open.
D	All of these are correct.

Question 20

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

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

Back to Texas CDL Practice Test

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