Colorado CDL Practice Test: Double and Triples - Test 2 2021

Based on 2021 CO CDL Handbook
Number of questions: 30
Passing score: 80%
Acceptable number of errors: 6

Instruction: 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 Colorado 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 Colorado DMV locations.

1. The tractor protection valve ______.
A
either 1 or 2
B
white
C
neither 1 nor 2
D
yellow
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