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Question:

When will the spring brakes used on the chambers in a straight truck bring you to a stop?

A When air pressure drops below 20 psi.

explanation

Tractor and straight truck spring brakes will come fully on when air pressure drops to a range of 20 to 45 psi (typically 20 to 30 psi). [California Commercial Driver Handbook]

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4 years ago

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4 years ago

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4 years ago

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