AIR BRAKES CDL PRACTICE TEST - OHIO
16.
Which of the following is not a braking system on a truck?
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Service brake
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Parking brake
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Steering brake
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17.
Why must air tanks be drained?
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The water can freeze in cold weather and cause brake failure.
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The alcohol evaporator might stop working.
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There might not be enough antifreeze in the system.
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18.
Some air brake systems have an alcohol evaporator. Checking the alcohol container and filling it up as necessary:
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helps you avoid wheel lock up.
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reduces the risk of ice in air brake valves during cold weather.
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helps keep the engine cool, as well as lubricating it.
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19.
To check that spring brakes come on automatically, the first thing to do is to:
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release the parking brake, move the vehicle forward slowly, and apply the brakes firmly.
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continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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turn off the engine, release the parking brake and time the air pressure drop.
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20.
If a load is placed on one side of the trailer:
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making turns may be easier.
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the steering axle weight will be too light to steer safely.
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a rollover is more likely.
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