MARYLAND CDL AIR BRAKES PRACTICE TEST
11.
Passive railroad crossings:
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usually have a person directing traffic.
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have at least one traffic control device.
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should never be crossed using a CMV.
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do not have traffic control devices.
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12.
The use of air brakes on a steep downgrade is only a supplement to:
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the use of the spring brakes.
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the braking effect of the engine.
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the use of the "controlled braking" method.
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the use of the parking brakes.
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13.
Air brakes are 3 different braking systems: service brake, parking brake, and _______ brake.
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emergency
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air storage brake
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S-cam
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foot
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14.
When backing, you should:
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only use mirror on the driver's side.
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back quickly.
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back and turn toward the right side whenever possible.
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use the mirrors on both sides.
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15.
To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
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