Home

  • ID Car Tests
  • ID Motorcycle Tests
  • ID CDL Tests
  • ID Driver Manuals

Idaho CDL Practice Test: Double and Triples - Test 5 2020

(From the 2020 Idaho CDL Handbook)
Number of tests: 28
Number of questions: 30
Passing score: 80

Directions: To obtain this endorsement for pulling two or three trailers, applicants must pass a 15-question test. And to pass the test, applicants must score at least 80%. Test questions are from the Idaho Commercial Driver Handbook. The Double/Triple trailers endorsement can be used with the Class A CDL. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Idaho DMV locations.

You have made error(s) so far.
Your Challenge Library: 0

1. Why should you keep the fifth wheel plate lubricated?

2. Automatic slack adjusters ________.

3. If you are pulling triple trailers where should you position the heaviest trailer?

4. When the emergency line loses pressure ______.

5. Which of the following is a necessary step to ensure that you have the best control of your double or triple on a curve?

6. The pressure in the service line indicates ______.

Your Progress

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

RATE THIS TEST


4.6 OUT OF 5.0
BASED ON 262 VOTES