WA CDL AIR BRAKES PRACTICE TEST
16.
The air storage tanks:
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are used to hold compressed air.
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stop the compressor from pumping air.
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are connected to the engine through gears or a v-belt.
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17.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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shifting into neutral may help slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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the parking brake should never used to slow the vehicle.
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18.
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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Pump the brakes until the air pressure drops below 80 psi.
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19.
Pressing and releasing the brake pedal unnecessarily can:
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causes friction, which slows the vehicle.
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apply more air pressure.
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let air out faster than the compressor can replace it.
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20.
Which of the following is NOT a reason for hydraulic brake failure?
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Brake fade on long hills
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Loss of hydraulic pressure
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Stab braking
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