2025 Massachusetts Cdl Air Brakes - Test 1
The following questions are from real Massachusetts CDL practice tests. After selecting the answer, you can see the explanation. After confirming, click "Next" to jump to the next question.
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1. If one air system in a dual air brake system is very low on pressure:
None of the brakes will work at all.
Either the front or rear brakes will not be operating fully.
There will be no noticeable affect.
Lights on the outside of the tractor will flash.
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Key Data
Number of Tests: 18
Number of Question: 25
Passing Score: 20
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