CA CDL Doubles Triples Practice Test
11.
The earliest way to recognize that your trailer has started to skid is:
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by checking your mirrors.
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by releasing the brakes.
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by checking the jackknife sensor.
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12.
When should you turn the retarder off?
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when the road is slippery.
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when your vehicle has a high center of gravity.
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when the cargo is heavy.
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13.
If your brakes fail on a steep mountain downgrade, you should:
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stay on the road and keep looking for the next available escape ramp.
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slow down until your vehicle comes to a complete stop.
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decide what to do as soon as you know your brakes do not work.
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14.
ABS helps you:
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brake harder.
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drive faster.
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None of the above.
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15.
When driving on slippery roads, you should NOT:
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go slowly.
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try to anticipate stops early.
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use the engine brake.
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16.
When you push in the red trailer air supply knob, this will:
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open the emergency line shut-off valve at the rear of the last trailer.
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disconnect the air lines from the trailer.
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supply air to the emergency supply lines.
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17.
Your mirrors should be adjusted so that:
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a part of the vehicle is visible in the mirror.
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no part of the vehicle is visible in the mirror.
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the rear of the vehicle is visible in the mirror.
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18.
With an engine fire, you should NOT:
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open the hood.
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shoot foam from the vehicle’s underside.
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turn the engine off as soon as possible.
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19.
Warnings on low bridges or underpasses:
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must be posted.
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are always posted.
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are often posted, but sometimes they are not.
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20.
Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:
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anti-lock brakes.
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hydraulic brakes.
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a rear backup camera.
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