NM CDL AIR BRAKES PRACTICE TEST
16.
The safety relief valve is usually set to open at ____ psi.
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75
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150
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50
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17.
To operate a vehicle equipped with air brakes, you must pass the air brakes knowledge test. Why?
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All trucks have air brakes.
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If you don't pass the air brakes test, you can't get a CDL.
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If you don't pass the air brakes test, you will be restricted to driving vehicles without air brakes.
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18.
The braking power of the spring brakes:
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is not affected by the condition of the service brakes.
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depends on the brakes being in adjustment.
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is not affected by the air pressure level.
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19.
To brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary, you can use:
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the "controlled braking" method.
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the "stab braking" method.
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the "controlled braking" method or the "stab braking" method.
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20.
If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:
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cracked.
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loose.
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tight.
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