North Dakota Doubles Triples Practice CDL Test
11.
When you back under a trailer:
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back the tractor slowly.
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use lowest reverse gear.
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make sure the trailer brakes are locked.
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All of the above.
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12.
Before driving a vehicle with a dual brake brake system, the driver should:
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wait at least 5 minutes before driving.
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allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
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pump the brake pedal 10 times to build pressure.
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wait at least 10 minutes before driving.
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13.
If you go twice as fast, your stopping distance will increase by:
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eight times.
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ten times.
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four times.
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two times.
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14.
To prevent rollover, you should:
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turn the engine off while turning.
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drive slowly around corners.
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drive on the shoulder of the road when possible.
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drive in the left lane.
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15.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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You may not notice a major leak in the service line until you try to put the brakes on.
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None of the above.
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16.
Which of the following is a good way to avoid becoming an aggressive driver?
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Keep your following distance reasonable.
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Be realistic about your travel time.
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Avoid talking on your cell phone.
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All of the above.
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17.
Another name for front-end header boards is:
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containerized racks.
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headache racks.
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cargo stopper.
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head belt.
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18.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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shifting into neutral may help slow the vehicle.
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the parking brake should never used to slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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All of the above.
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19.
If you must stop on a one-way or divided highway, place your warning devices:
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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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20.
Which of these statements about brakes is true?
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To stop, the brake shoes and linings are pushed against the outside of the drum.
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The lighter the vehicle, the more heat the brakes absorb to stop it.
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Brake fade does not result from excessive heat.
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None of the above.
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