CDL COMBINATION PRACTICE TEST (CA)
11.
Air brakes:
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are an effective way to stop large and heavy vehicles.
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should be used only when driving on wet roads.
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are prohibited on larger vehicles.
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12.
When you are driving on a slippery road, you should NOT:
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adjust turning and braking to road conditions.
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use the engine brake or speed retarder.
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keep a longer following distance.
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13.
Longer combination vehicles have the tendency to swing wide on turns. This is called:
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off-tracking.
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hydroplaning.
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jackknifing.
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14.
When parking, you should choose a spot:
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that requires backing up.
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that allows you to pull forward when you leave.
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that allows you do a walk around inspection.
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15.
As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
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the service line valve close.
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a mechanical vibration.
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air escaping from the open valve.
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16.
Loose cargo:
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could hurt or kill you during a quick stop.
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can be a danger to others and yourself.
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All of the above.
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17.
Rollovers happen when drivers:
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brake too hard.
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turn too slowly.
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turn too fast.
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18.
When driving trucks with trailers, drivers should:
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avoid making sudden movements with the steering wheel.
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make quick lane changes.
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push the brake pedal to the floor when braking.
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19.
If you feel drowsy while driving, what should you do?
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Get an energy drink.
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Pull off the road and get some sleep.
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Turn on the radio to keep you awake.
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20.
To stop a trailer skid, you should:
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release the brakes to get traction back.
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use the trailer hand brake to straighten out the rig.
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use the brakes to slow down.
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