1. Usually, a fully charged air system has _______ psi.
A
When the road is wet or slippery
B
At intersections or railroad crossings
C
On narrow or winding roads
D
All of the above
Massachusetts CDL Practice Test: Double and Triples - Test 3 2021
Based on 2021 MA 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 Massachusetts 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 Massachusetts DMV locations.