NEW MEXICO CDL AIR BRAKES PRACTICE TEST
16.
If your vehicle has dual parking control valves, you can use pressure from a separate tank to:
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park better.
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balance the service brakes while you are parked.
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release the spring brakes so you can move the vehicle in an emergency.
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17.
Before starting down a hill, you should slow down and shift down:
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to a speed that you can control without using the brakes hard.
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to a gear that will cause your engine to exceed its redline.
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so you can coast downhill.
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18.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should not be removed.
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should be drained completely.
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should be added regularly.
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19.
If air pressure does not build up fast enough:
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the pressure may drop too low during driving.
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you should turn the electrical power on and step on and off the brake pedal.
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you should put the parking brake on and gently pull against it in a low gear.
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20.
In air-operated disc brakes, the pressure of the ______ on the ______ turns a "power screw".
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slack adjuster; tie rod
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brake chamber; slack adjuster
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brake camshaft; tie rod
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