ME CDL AIR BRAKES PRACTICE TEST
6.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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100 to 120 psi
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20 to 45 psi
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10 to 20 psi
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7.
If you are being tailgated, you should:
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increase your following distance.
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move to the left lane.
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speed up.
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8.
With a dual air brake system:
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each system has its own air tanks, hoses and lines.
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each system shares air tanks.
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each system shares the same lines and hoses.
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9.
In a vehicle with a dual air brake system:
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one system supplies air to the trailer.
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both systems typically operate the regular brakes on the rear axle.
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each system has its own air tanks.
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10.
In newer vehicles with air brakes, you put on the parking brake:
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placing the transmission in Park.
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using a P-shaped, yellow control knob.
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using a diamond-shaped, yellow, push-pull control knob.
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