Air Brakes Practice Test - Mississippi
21.
When the spring brakes are on, you should never:
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push the brake pedal down.
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change lanes.
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upshift.
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decrease your speed.
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22.
When the air pressure is built up to governor cutoff, the air leakage rate for combination vehicles with the engine off and the foot brake fully applied should be less than_____ in one minute.
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3 psi
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2 psi
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4 psi
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5 psi
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23.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
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hydraulic brake system
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S-cam
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air compressor belt
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pressure gauge
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24.
Typically an air system is fully-charged at:
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125 psi
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25 psi
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250 psi
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75 psi
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25.
Controlled braking:
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involves locking the wheels and then releasing the brakes.
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involves pumping the brakes while keeping steering wheel movements very small.
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must be used when you need to turn sharply while braking.
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can be used to keep your vehicle in a straight line and allow you to turn if necessary.
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