CDL AIR BRAKES PRACTICE TEST - WASHINGTON
11.
A broken exhaust system:
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can let poisonous carbon monoxide to leak into the cab.
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poses no threat to the driver.
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can improve fuel efficiency.
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12.
To avoid becoming a distracted driver you should:
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not turn off all communication devices.
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adjust all vehicle controls and mirrors while driving.
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not engage in complex conversations with others.
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13.
Most heavy vehicles require ________ change gears.
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double clutching
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double shifting
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single clutching
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14.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
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You have to apply your brakes harder and harder to get the same stopping power.
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The brake pedal feels spongy or goes to the floor.
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You hear a loud "bang".
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15.
If your vehicle is hydroplaning, you should:
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use the brakes to slow down.
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accelerate to get through the water as quickly as possible.
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release the accelerator and push in the clutch.
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