A dual air brake system has a primary and a secondary system. Before you drive, what is the least pressure, in psi, that each of them must reach?

Answer options

Why

Each of the two circuits in a dual air system must be charged to no less than 100 psi before the vehicle moves. If you start out with less, there may not be enough air for a quick, hard stop.

About this question

Topic: Air brakes   License: CDL

Part of these practice sets:

• Checking and Using Air Brakes

Where it applies: Asked in every state.

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This question is part of Checking and Using Air Brakes (15 questions). Take the full set and check your score.

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