Michigan CDL Practice Test: Double and Triples - Test 3 2021

From the 2021 MI CDL Handbook
Number of questions: 30
Passing score: 80%
Acceptable number of errors: 6

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 Michigan 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 Michigan DMV locations.

1. Usually, a fully charged air system has _______ psi.
A
All of the above
B
When the road is wet or slippery
C
At intersections or railroad crossings
D
On narrow or winding roads
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