IDAHO CDL DOUBLES TRIPLES PRACTICE TEST
11.
When stopping you should push the brake pedal down:
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repeatedly.
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quickly.
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gradually.
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12.
When the wheels of a trailer lock up:
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the trailer will tend to swing around.
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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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13.
Emergency equipment is:
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required.
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only required when transporting hazardous materials.
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optional.
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14.
You should NOT use the parking brakes if:
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the brakes are cold.
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the brakes are very hot.
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the brakes are too dry.
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15.
When driving double and triple trailers, drivers should:
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allow more following distance.
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steer gently and go slowly around corners.
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All of the above.
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16.
If a tire fails while you are driving, you should:
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stay off the brake
until your vehicle has slowed down.
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stop on the roadway if possible.
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call your supervisor for instructions.
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17.
The tractor protection valve:
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keeps air in the brake system should the trailer develop a bad leak.
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keeps your wheels from locking up when you brake hard.
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prevents the trailer from being accidentally released.
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18.
Rough acceleration can cause:
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tire damage.
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mechanical damage.
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damage electrical and brake lines.
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19.
Emergency brakes are:
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not required on buses.
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not required on doubles.
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required on all vehicles.
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20.
Retarders:
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help slow a vehicle and reduce brake wear.
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apply their
braking power whenever
you push on the accelerator.
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help prevent accidents by applying extra braking power to the non-drive wheels.
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