MT CDL AIR BRAKES PRACTICE TEST
11.
Before transporting sealed loads, you should check that:
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the load can be inspected.
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the seal numbers match the placard numbers.
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the load is properly secured.
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All of the above.
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12.
If are being followed closely, you should:
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increase your following distance.
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change lanes quickly.
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flash your brake lights.
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decrease your following distance.
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13.
What should you do to test your vehicle's low air pressure warning signal?
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With the engine running, put the vehicle in a forward gear and attempt to drive forward.
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With the key in the "on" or "battery charge" position, rapidly apply and release the foot brake.
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Release the parking brake valve and the tractor protection valve and reduce the air pressure by stepping on and off the brake pedal.
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Pump the brakes until the air pressure drops below 80 psi.
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14.
The Johnson bar is a valve that:
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keeps air from going out if the air compressor develops a leak.
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reduces the braking pressure to a safe level.
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is installed in the first tank the air compressor pumps air to.
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works the trailer brakes.
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15.
The air compressor governor controls:
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the air pressure applied to the brakes.
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when air tank pressure falls below the “cut-out” level.
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the speed of the air compressor.
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when the air compressor will pump air into the air storage tanks.
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