COMBINATION PRACTICE TEST - NV CDL
11.
When backing a trailer, if you turn the wheel left:
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the cab and the trailer will go left.
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the cab will go right and the trailer will go left.
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the cab and the trailer will go right.
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the cab will go left and the trailer will go right.
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12.
When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:
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the trailer supply valve will stay open.
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the trailer emergency brakes will come on.
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the engine will shut down.
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the tractor will lose all air pressure.
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13.
If you let air out of hot tires:
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as the tire cools, the air pressure will be too low.
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air pressure will increases, causing the tires to blow out.
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the tires will cool off much sooner.
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None of the above.
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14.
If you are feeling sleepy, you should:
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slow down and drive on the shoulder of the road.
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pull off the road and rest or take a nap.
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increase your speed to get to the destination quicker.
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None of the above.
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15.
The best way to test the trailer service brakes is to:
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pull forward quickly, then apply the trailer brakes with your hand control.
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accelerate to the maximum possible speed, then apply the trailer brakes fully.
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put the handbrake on when there are no vehicles around you.
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None of the above.
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16.
During a trip you need to inspect the cargo and its securing devices:
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every 3 hours or 150 miles.
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after every break you take.
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within the first 50 miles after beginning a trip.
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All of the above.
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17.
Which of the following is NOT part of checking the sliding fifth-wheel?
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Checking that all locking pins are present and locked in place
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Checking that the slide is not damaged or parts are missing
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Checking that it is properly greased
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Testing the tractor protection valve
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18.
Which of the following is not a reason for covering cargo?
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To protect people from spilled cargo
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To protect the cargo from weather
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To prevent other drivers from looking at the cargo
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All of the above.
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19.
An Anti-lock Braking System:
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increases a vehicle's stopping power.
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increases the distamce required to stop on slippery surfaces.
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lets you brake faster.
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keeps your wheels from locking when you brake hard.
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20.
When inspecting the coupling, check that the safety latch is:
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in the "lock" position.
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pushing against the kingpin.
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in position over the locking lever.
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None of the above.
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