AIR BRAKES CDL PRACTICE TEST - SOUTH DAKOTA
11.
Front wheel braking is good:
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Never.
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only in wet conditions.
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under all conditions.
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only in good weather.
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12.
The __________ keeps air from going out if the air compressor develops a leak.
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emergency relay valve
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air compressor drive belt
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one-way check valve
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tractor protection valve
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13.
When should you be particularly careful about high winds?
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When going downhill
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When driving in winter
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When driving at night
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When emerging from a tunnel
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14.
To check that spring brakes come on automatically, the first thing to do is to:
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continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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release the parking brake, move the vehicle forward slowly, and apply the brakes firmly.
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turn off the engine, release the parking brake and time the air pressure drop.
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All of the above.
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15.
ABS:
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helps you stop faster.
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may cause your wheels to lock when you break hard.
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improves your visibility at night.
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helps you avoid skids caused by over braking.
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