CDL AIR BRAKES PRACTICE TEST - OHIO
6.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
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5; 6
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3; 2
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3; 4
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7.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than ___ the width of the friction area.
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1/4
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1/2
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3/5
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8.
Stepping on and off the brake pedal several times:
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reduces the air pressure in the tanks.
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may cause air leaks.
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may result in dangerously thin linings.
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9.
The wig wag is:
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a low air pressure warning system.
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a noise reduction mechanism.
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a type of rollover.
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10.
Supply pressure gauges tell you:
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how much air pressure you are applying to the brakes.
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when the air pressure in the tanks falls below 60 psi.
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how much pressure is in the air tanks.
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