AIR BRAKES CDL PRACTICE TEST - NEW YORK
6.
Some vehicles have a separate air tank which can be used to:
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hold the vehicle or combination of vehicles stationary.
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turn on the 4-way emergency flashers.
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unload cargo or passengers.
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release the spring brakes.
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7.
The most common foundation brakes found on vehicles with air brakes are the:
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disc brakes.
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parking brakes.
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S-cam brakes.
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wedge brakes.
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8.
If you are being tailgated, you should:
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increase your following distance.
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avoid tricks like turning on your taillights or flashing your brake lights.
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avoid quick changes.
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All of the above.
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9.
When you apply the brakes, the brake shoes and linings are pushed against:
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the supply pressure gauge.
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the safety relief valve.
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the S-cam.
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None of the above.
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10.
The s-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the s-cam because:
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it applies a "Shock" to the brakes.
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"S" stands for "Shoes".
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it is shaped like the letter "S".
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it is a safe-driving brake.
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