AIR BRAKES CDL PRACTICE TEST - PENNSYLVANIA
6.
The air storage tanks:
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are used to hold compressed air.
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are connected to the engine through gears or a v-belt.
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stop the compressor from pumping air.
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protects the tank and the rest of the system from too much pressure.
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7.
The trailer hand valve should:
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never be used for parking.
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never be used to test the trailer brakes.
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be used in driving.
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All of the above.
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8.
Which of the following statements is true?
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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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Under-inflated tires will NOT cause a vehicle fire.
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Poor cargo ventilation is a common cause of fire.
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There is no way that short circuits due to damaged insulation can cause a vehicle fire.
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9.
When going down grades, you should:
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downshift to a lower gear.
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put the transmission in Neutral.
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rely solely on engine braking to reduce your speed.
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shift up.
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10.
The braking power of the spring brakes:
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depends on the brakes being in adjustment.
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is not affected by the condition of the service brakes.
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is not affected by the air pressure level.
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All of the above.
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