CDL AIR BRAKES PRACTICE TEST - OKLAHOMA
11.
You should NOT use the parking brakes if:
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the brakes are too dry.
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the brakes are cold.
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the brakes are very hot.
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12.
If your vehicle is hydroplaning, you should:
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use the brakes to slow down.
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accelerate to get through the water as quickly as possible.
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release the accelerator and push in the clutch.
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13.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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100 psi
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150 psi
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50 psi
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14.
Air tanks must be drained completely to:
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remove all moisture and oil.
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remove all the air.
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pump water and compressor oil into the tanks.
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15.
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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the air pressure applied to the brakes.
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when air tank pressure falls below the “cut-out” level.
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