AIR BRAKES CDL PRACTICE TEST - MISSISSIPPI
21.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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greater; more
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greater; less
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less; less
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less; more
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22.
How many reflective triangles/emergency reflectors should you carry?
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3
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1
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4
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2
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23.
Brake lag is:
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the amount of air pressure required to stop the vehicle.
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the time required for the air brakes to work after the brake pedal is pushed.
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the distance your vehicle will travel, in ideal conditions, while you are braking.
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the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
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24.
What should you do to test your vehicle's low air pressure warning signal?
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Pump the brakes until the air pressure drops below 80 psi.
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With the engine running, put the vehicle in a forward gear and attempt to drive forward.
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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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With the key in the "on" or "battery charge" position, rapidly apply and release the foot brake.
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25.
Stepping on and off the brake pedal several times:
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may result in dangerously thin linings.
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may cause air leaks.
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reduces the air pressure in the tanks.
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All of the above.
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