AIR BRAKES CDL PRACTICE TEST - OKLAHOMA
16.
ABS helps you:
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avoid wheel lock up and maintain control of your vehicle when you brake.
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increase your normal braking capability.
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steer gently and smoothly while you are braking.
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17.
The safety valve is usually set to open at:
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125 psi
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200 psi
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150 psi
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18.
If your vehicle has an alcohol evaporator, every day during cold weather, you should:
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fill it up with oil to prevent the pipes from freezing.
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check the alcohol container and fill up as necessary.
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fill it up with oil to prevent alcohol from freezing.
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19.
When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
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left; right
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left; left
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right; left
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20.
When is it safe to leave your vehicle unattended without applying the parking brakes or chocking the wheels?
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Never.
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When you are conducting your pre-trip inspection.
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Only while you are taking a rest break.
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