CDL Practice Tests

Air Brake Practice Test 2

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Question #1 of 30

Air Brake Test Question Image

When testing the low-pressure warning signal, turn the electrical power on and step on and off the brake pedal to reduce air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than ____ psi in the air tank.


30.

45.

60.

90.

100.




 

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