CDL AIR BRAKES PRACTICE TEST - GEORGIA
11.
When the wheels of a trailer lock up:
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ABS will increase stopping power.
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the vehicle will gradually come to a complete stop.
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the trailer will tend to swing around.
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All of the above.
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12.
If air pressure does not build up fast enough:
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you should turn the electrical power on and step on and off the brake pedal.
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you may be forced to turn off the engine and release the parking brake.
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you should put the parking brake on and gently pull against it in a low gear.
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the pressure may drop too low during driving.
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13.
Which of the following is TRUE about dual air brake systems?
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most heavy-duty vehicles use dual air brake systems.
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Each brake system has its own air tanks, hoses and lines.
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A dual air brake system has 2 separate air brake systems.
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All of the above.
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14.
When backing, you should:
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use the mirrors on both sides.
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back quickly.
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only use mirror on the driver's side.
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back and turn toward the right side whenever possible.
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15.
When going down grades, you should:
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rely solely on engine braking to reduce your speed.
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put the transmission in Neutral.
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shift up.
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downshift to a lower gear.
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