AIR BRAKES PRACTICE TEST - OHIO
11.
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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it is shaped like the letter "S".
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"S" stands for "Shoes".
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12.
Empty trucks:
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require greater stopping distances.
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are higher than loaded trucks.
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All of the above.
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13.
To check the slack adjusters:
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Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
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check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
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park downhill and see if the vehicle rolls.
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14.
When driving on slippery roads, you should NOT:
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use the engine brake.
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go slowly.
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try to anticipate stops early.
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15.
If your vehicle has dual parking control valves, you can use pressure from a separate tank to:
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balance the service brakes while you are parked.
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park better.
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release the spring brakes so you can move the vehicle in an emergency.
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