DOUBLES TRIPLES TEST KS - CDL PRACTICE TEST
11.
If you unlock the pintle hook with the dolly still under the rear trailer:
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the brakes could be damaged by the combined forces of the springs and the air pressure.
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your vehicle might roll away.
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steam and boiling water can spray under pressure.
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the dolly tow bar may fly up.
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12.
The best way to recognize that your trailer has started to skid is:
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by feeling the brakes come on.
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by recognizing tire failure.
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by seeing it in your mirrors.
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by opening the window and feeling the front of the mirror.
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13.
If driving a heavy vehicle, you should:
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try to pass other vehicles going uphill.
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avoid braking.
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stay in the right lane.
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stay in the left lane.
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14.
If the fifth-wheel locking lever is not locked after the jaws close around the kingpin:
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the parking brakes are on and the wheels are chocked.
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the coupling is not right and you should not drive until you get it fixed.
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the parking brakes are on and your vehicle is safe to drive.
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cargo is properly blocked.
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15.
Right after it starts to rain, the road is very slippery. Why?
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Because rain is very slippery.
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Because the water mixes with oil left on the road by vehicles.
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Because black ice may form on the road.
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None of the above.
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16.
When backing, it is best to:
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back toward the passenger's side when possible.
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use only the passenger's side mirror.
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try to back in the direction of the drift.
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use a helper whenever possible.
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17.
As you approach off ramps and on ramps, remember:
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to always brake and turn at the same time.
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that downgrades make it easier to reduce speed.
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to maintain your highway speed.
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that the posted speed limit may not be safe for larger vehicles.
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18.
Air pressure should build up in a single air system, within about:
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1 minute.
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15 minutes.
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3 minutes.
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10 minutes.
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19.
On front tires, tread should be at least:
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2/32 inch
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4/32 inch
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4/16 inch
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1/16 inch
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20.
When going down a steep downgrade, you should primarily brake using:
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the emergency brake.
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the parking brake.
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the service brakes.
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the braking effect of the engine.
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