CDL COMBINATION PRACTICE TEST (NJ)
11.
You have two tie-downs on a 15 foot load. How many more tie-downs do you need to secure cargo and keep it from shifting or falling?
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One
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Three
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None
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Two
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12.
Which of the following is NOT true? ABS (antilock braking system):
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is required on all truck tractors with air brakes built on or after March 1, 1997.
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increases your normal braking capability.
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is an addition to your normal brakes.
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only activates when the wheels are about to lock up.
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13.
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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a mechanical vibration.
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a thumping sound.
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air escaping from the open valve.
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the service line valve close.
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14.
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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15.
A vehicle inspection should be done in the same order each time:
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because the report must be written in that order.
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because it's much quicker.
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because it is required by law.
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so you are less likely to forget something.
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16.
After starting the engine, the ABS light stays on. This means:
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the ABS oil level is not adequate.
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the ABS is working properly.
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the ABS is in Neutral.
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the ABS is not working properly.
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17.
To stop a trailer skid, you should:
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use the brakes to slow down.
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use the trailer hand brake to straighten out the rig.
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countersteer to get traction back.
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release the brakes to get traction back.
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18.
When you park trailers without spring brakes, you should use wheel chocks:
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to prevent air from escaping.
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to prevent overheating.
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to prevent the transmission from shifting up.
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to keep the trailer from moving.
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19.
On front tires, tread should be at least:
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1/16 inch
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2/32 inch
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4/16 inch
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4/32 inch
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20.
Never
drive with landing gear only part way up. Why?
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It makes it harder to brake.
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It may catch on railroad tracks.
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It must be exactly 5 feet off the ground.
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It may be harder to use.
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