AIR BRAKES CDL PRACTICE TEST - MARYLAND
16.
If you get stuck on railroad tracks, you should:
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get out of the vehicle and away from the tracks.
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have a helper push your vehicle.
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stay in the vehicle and call for help.
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check the engine compartment quickly.
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17.
Air tank drains:
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are used to remove water and oil from the air tanks.
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protect the tanks and the rest of the system from too much pressure.
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should not be used in wet weather.
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are used to move air to the brakes.
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18.
What should you do to test your vehicle's low air pressure warning signal?
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Pump the brakes until the air pressure drops below 80 psi.
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With the engine running, put the vehicle in a forward gear and attempt to drive forward.
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Release the parking brake valve and the tractor protection valve and reduce the air pressure by stepping on and off the brake pedal.
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With the key in the "on" or "battery charge" position, rapidly apply and release the foot brake.
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19.
Tar in the road pavement rising to the road surface in very hot weather:
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might get in your engine.
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is very sticky and will slow down your vehicle.
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causes the road to become very slippery.
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does not affect the road surface or driving conditions.
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20.
If your truck catches fire, the first thing you should do is to:
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get off the vehicle, open the hood and start shooting foam to keep the engine cool.
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pull into a service station and call for help.
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get the vehicle off the road and park near other vehicles.
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pull off the road and park in an open area.
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