MT CDL AIR BRAKES PRACTICE TEST
6.
When going down a steep downgrade, you should:
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use escape ramps whenever possible.
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use the parking brake.
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avoid braking and rely on engine braking.
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use a low gear, and a proper braking technique.
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7.
Air brakes are 3 different braking systems: service brake, parking brake, and _______ brake.
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air storage brake
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S-cam
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foot
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emergency
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8.
The trailer hand valve should:
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never be used to test the trailer brakes.
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never be used for parking.
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be used in driving.
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All of the above.
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9.
The s-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the s-cam because:
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"S" stands for "Shoes".
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it is a safe-driving brake.
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it is shaped like the letter "S".
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it applies a "Shock" to the brakes.
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10.
You are going down a steep grade. Once the vehicle is in the proper low gear, you should brake just hard enough to feel a slowdown, and then release the brakes when your speed has been reduced to ____ below your safe speed.
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10 mph
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20 mph
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15 mph
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5 mph
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