CDL Doubles and Triples Test Question and Answers

CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Driver’s License Doubles and Triples Endorsements Knowledge Test. Try our free CDL Doubles and Triples Test Question and Answers Quiz online.

Take special care when pulling two and three trailers. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license.

CDL Doubles and Triples Test Question and Answers 2023 [PDF]

CDL Doubles and Triples Test Question and Answers

Test Name CDL Practice Test 2023
Language English
License Endorsements Permit
Total Questions 30 MCQs
Test For Commercial Driver License
Test Preparation Doubles and Triples Endorsements
Country USA
Explanation No
0%
0 votes, 0 avg
26

CDL Doubles/Triples Test

1 / 30

You are driving a tractor with multiple trailers. Which of the following statements about off tracking is true?

2 / 30

When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Which diagram shows the best way to turn?

3 / 30

You are driving with more than one trailer. Which trailer should come first behind the tractor?

4 / 30

Converter dollies often do not have

5 / 30

What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly?

6 / 30

While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel.

7 / 30

The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples

8 / 30

During a jackknife, it is best to

9 / 30

Which of the following is true about loading cargo into double or triple trailers?

10 / 30

Trucks with trailers have a dangerous “crack-the-whip” effect. Because of this, which of the following vehicle parts is most likely to tip over?

11 / 30

When coupling twin trailers, a converter dolly is

12 / 30

Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid?

13 / 30

When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position.

14 / 30

What is one function of the tractor protection valve?

15 / 30

While doing a walkaround inspection of a double or triple, the converter dolly air tank drain valve should be _______, and the pintle hook should be _______.

16 / 30

When you are pulling trailers, which of the following statements is true about steering?

17 / 30

When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer.

18 / 30

Which of the following must be connected when coupling tractor to trailer or trailer to trailer?

19 / 30

When checking the coupling system, make sure that the locking jaws are around the shank of the

20 / 30

If you are driving a 200-foot triple at 35 mph, what is the minimum amount of space (in seconds) that you should keep ahead of you?

21 / 30

It is important to check the height of the trailer before connecting a converter dolly to a trailer. The trailer is at the correct height when

22 / 30

Trucks that are empty or lightly loaded

23 / 30

You are driving a triple trailer and there is a loss of air pressure in the emergency line. Which of the following will occur?

24 / 30

When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer.

25 / 30

When driving a double or triple trailer, greater care must be given to

26 / 30

In order to supply air to the air tanks of a second trailer, you must ______ shut-off valves at the rear of the first trailer and ________ the shut-off valves at the rear of the second trailer.

27 / 30

_______ should be tested with the hand valve but controlled in normal operation with the foot pedal.

28 / 30

You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. This means

29 / 30

In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi.

30 / 30

The pintle hook plays a part in

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