CDL AIR BRAKES PRACTICE TEST - ARKANSAS
6.
In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
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12
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60
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20
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45
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7.
Air tank drains:
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should not be used in wet weather.
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protect the tanks and the rest of the system from too much pressure.
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are used to remove water and oil from the air tanks.
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are used to move air to the brakes.
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8.
With a dual air brake system:
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each system shares the same lines and hoses.
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one system is the main braking system while the other is a back-up system.
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each system has its own air tanks, hoses and lines.
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each system shares air tanks.
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9.
You should always try to back toward the driver's side because:
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backing toward the left side is more dangerous.
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you can watch the rear of your vehicle out the side window.
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you can more easily correct any steering errors.
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None of the above.
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10.
Emergency brakes are:
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not required on doubles.
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not required on commercial vehicles with air brakes.
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not required on buses.
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required on all vehicles.
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