Air Brakes Practice Test - Kansas
21.
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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22.
The tractor protection valve:
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will close if you apply the parking brakes.
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provides the air supply for the brake system.
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will close automatically if the air pressure drops to a certain level.
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All of the above.
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23.
When the low air pressure warning light and buzzer first come on, you should:
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downshift and slow down.
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speed up to restore pressure.
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immediately put alcohol into the air system.
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bring the vehicle to a safe stop right away.
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24.
By pushing the trailer air supply control knob in, you:
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shut the air off and put on the trailer emergency brakes.
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keeps air in the tractor or truck brake system.
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supply the tires with air.
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supply the trailer with air.
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25.
Which of the following is not a way to know when to change gears?
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Use road speed (mph)
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Watch your tachometer
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Use engine speed (rpm)
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Check that the pressure gauge shows normal oil pressure
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