AIR BRAKES CDL PRACTICE TEST - MINNESOTA
11.
Typically an air system is fully-charged at:
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75 psi
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125 psi
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25 psi
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250 psi
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12.
Rough acceleration:
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is necessary to warm up the engine.
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is recommended during long trips.
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can cause mechanical damage.
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improves gas mileage.
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13.
If air doesn't flow all the way to the back:
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a rollover is more likely.
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your lower fifth wheel may fall off.
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the trailer will tend to swing around.
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your brakes will not work properly.
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14.
The safety relief valve is located:
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on each end of the vehicle's axles.
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in the first tank the air compressor pumps air to.
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in the front brake.
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on the dashboard.
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15.
If your vehicle is equipped with a front brake limiting valve, to ensure normal stopping power make sure the control is:
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in the "normal" position.
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in the "slippery" position.
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in the "off" position.
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in the "neutral" position.
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