DELAWARE DOUBLES TRIPLES PRACTICE CDL TEST
11.
You are driving a double. Before entering traffic, you should:
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always come to a complete stop.
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make sure you have a large enough gap before entering or crossing traffic.
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turn on your headlights.
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assume there is enough room to merge into traffic.
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12.
Engine oil pressure should come up to normal within _________ after the engine is started.
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two minutes
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five minutes
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ten minutes
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seconds
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13.
When you turn suddenly, which trailer is most likely to turn over?
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The rear trailer of doubles
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The front trailer
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The last trailer of triples
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None of the above.
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14.
You should test the coupling by:
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disconnect the safety chains.
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pulling against the pin of the second semitrailer.
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applying the parking brakes so the rig will not move.
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locking the pintle hook.
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15.
After starting the engine, the ABS light stays on. This means:
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the ABS is not working properly.
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the ABS is working properly.
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the ABS oil level is not adequate.
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the ABS is in Neutral.
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16.
To prevent getting sleepy while driving, you should:
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close the vent.
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drive alone whenever possible.
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keep cool by opening the window.
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keep the cab warm.
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17.
If you are carrying a heavy load that is slowing you down, you should:
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drive on the shoulder.
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drive in the right lane.
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keep the vehicle in third gear.
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drive in the left lane.
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18.
You should be especially alert for drunk drivers:
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in the morning.
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late at night.
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around shopping areas.
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in the early evening.
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19.
Doubles and triples are:
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less likely to turn over than other combination vehicles.
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more likely to turn over than other combination vehicles because of the "crack-the-whip" effect.
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easier to drive than other combination vehicles.
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more stable than straight trucks.
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20.
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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the service line valve close.
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a thumping sound.
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air escaping from the open valve.
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