PA CDL AIR BRAKES PRACTICE TEST
21.
The use of brakes on a steep downgrade is:
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a supplement to the braking effect of the engine.
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much more effective than the engine braking effect.
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the main braking factor.
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dangerous, and should be avoided at all costs.
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22.
Which of the following is not a braking system on a truck?
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Parking brake
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Steering brake
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Emergency brake
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Service brake
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23.
A tank endorsement is:
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not required when transporting hazardous materials.
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only required when transporting liquids.
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only required when transporting gases.
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required for both liquids and gases.
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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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supply the tires with air.
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supply the trailer with air.
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keeps air in the tractor or truck brake system.
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25.
If a load is placed on one side of the trailer:
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a rollover is more likely.
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making turns may be easier.
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the steering axle weight will be too light to steer safely.
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your brakes won't work.
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