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Question
Applying the brake pedal causes air pressure to activate an electric switch and:
Answers
A.  Turn off the brake lights.
B.  Turn on the low pressure warning light.
C.  Turn on the brake lights.
D.  Turn off the low pressure warning light.
Explanation
In a vehicle with air brakes, the brake lights are activated when the brake pedal is pushed and air pressure moves an electric switch. With the application of air pressure, the switch will then turn on the brake lights.

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