AIR BRAKES CDL PRACTICE TEST - CALIFORNIA
11.
In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
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45
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12
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20
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12.
By pushing the trailer air supply control knob in, you:
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shut the air off and put on the trailer emergency brakes.
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supply the tires with air.
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supply the trailer with air.
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13.
The air compressor governor controls:
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when the air compressor will pump air into the air storage tanks.
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when air tank pressure falls below the “cut-out” level.
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the air pressure applied to the brakes.
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14.
A dual air brake system:
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has two separate air brake systems, which use a single set of brake controls.
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has a single air brake system, which uses a single set of brake controls.
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has two separate air brake systems, which use two separate sets of brake controls.
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15.
In a vehicle with a dual air brake system:
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each system has its own air tanks.
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both systems typically operate the regular brakes on the rear axle.
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one system supplies air to the trailer.
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