AIR BRAKES CDL PRACTICE TEST - MASSACHUSETTS
6.
If an aggressive driver is involved in an accident down the road, you should:
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stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
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confront the aggressive driver.
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make eye contact with the driver.
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try to get their vehicle to the side of the road.
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7.
The __________ keeps air from going out if the air compressor develops a leak.
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tractor protection valve
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one-way check valve
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air compressor drive belt
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emergency relay valve
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8.
The use of brakes on a steep downgrade is:
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dangerous, and should be avoided at all costs.
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much more effective than the engine braking effect.
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the main braking factor.
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a supplement to the braking effect of the engine.
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9.
If you must drive slowly, how should you alert following drivers?
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Flash your brake lights
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Use your emergency flashers if it is legal
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Help them out by signaling when it is safe to pass
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Turn on your taillights
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10.
Which of the following is not a way to know when to change gears?
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Use engine speed (rpm)
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Use road speed (mph)
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Watch your tachometer
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Check that the pressure gauge shows normal oil pressure
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