Answer :
Final answer:
In a duel air braking system, the governor, which controls the air pressure, typically cuts OUT when the pressure in the tanks reaches around 130 psi.
Explanation:
In a duel air braking system, the air pressure is regulated by a device known as a governor. The governor plays a pivotal role in ensuring the safe and proper operation of the braking system. Its main function is to automatically cut in and cut out the air compressor at preset pressures. For safety and effectiveness, the governor must cut OUT when the air pressure in the tanks reaches the correct level. Typically, this is around 120-135 psi. Therefore, the closest answer to your question would be D. 130 psi.
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