AIR BRAKES CDL PRACTICE TEST - RHODE ISLAND
16.
To apply the parking brakes:
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push the parking brake control knob in.
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place the parking brake control knob in Neutral.
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pull the parking brake control knob out.
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17.
Why must air tanks be drained?
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The alcohol evaporator might stop working.
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The water can freeze in cold weather and cause brake failure.
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There might not be enough antifreeze in the system.
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18.
Air brakes are 3 different braking systems: service brake, parking brake, and _______ brake.
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S-cam
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emergency
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foot
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19.
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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3; 4
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5; 6
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3; 2
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20.
If air pressure does not build up fast enough:
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you should turn the electrical power on and step on and off the brake pedal.
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the pressure may drop too low during driving.
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you should put the parking brake on and gently pull against it in a low gear.
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