AIR BRAKES PRACTICE TEST - NEW HAMPSHIRE
11.
Emergency brakes are:
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required on all vehicles.
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not required on doubles.
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not required on buses.
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not required on commercial vehicles with air brakes.
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12.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To know whether you can make a quick lane change in an emergency.
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To move out of their way if they want to get past.
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To better assess your own speed.
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To flash the brake lights if you are being tailgated.
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13.
The use of brakes on a steep downgrade is:
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much more effective than the engine braking effect.
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the main braking factor.
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dangerous, and should be avoided at all costs.
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a supplement to the braking effect of the engine.
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14.
To check the slack adjusters on S-cam brakes, you should:
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park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
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park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
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release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
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All of the above.
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15.
Service brakes should:
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be checked before each trip.
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only be checked by a mechanic.
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always be checked before applying the brakes.
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All of the above.
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