DOUBLES TRIPLES TEST IL - CDL PRACTICE TEST
11.
Which of the following may have reduced the clearances since the heights were posted at bridges and overpasses?
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Traffic
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Repaving of the road
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The weight of a cargo
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Rain
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12.
If your brakes fail on a steep mountain downgrade, you should:
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stay on the road and keep looking for the next available escape ramp.
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decide what to do as soon as you know your brakes do not work.
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slow down until your vehicle comes to a complete stop.
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set the parking brake and park in an open area.
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13.
Emergency brakes are:
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required on all vehicles.
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not required on doubles.
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not required on buses.
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not required on commercial vehicles with air brakes.
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14.
You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
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activate your hazard lights and drive to the nearest place where you can stop.
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pull off the road and stop immediately.
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apply the brakes as hard as you can.
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slow down and test your brakes.
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15.
An item that is 15 feet long placed on a flatbed trailer should have at least:
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3 tie-downs.
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2 tie-downs.
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15 tie-downs.
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1 tie-down.
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16.
When should you downshift automatic transmissions?
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When you start to get drowsy.
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When you want to go faster.
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When going down steep grades.
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17.
Which of the following is a reason to cover 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 contain a spill
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All of the above.
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18.
If your vehicle thumps or vibrates heavily, it may be a sign that:
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you need to shift up.
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one of the tires has gone flat.
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the engine belt is loose.
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the brakes have failed.
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19.
When driving a double or triple, you should:
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decrease your following distance.
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increase your following distance.
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drive in the left lane whenever possible.
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drive with emergency flashers on.
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20.
When you double your speed, the braking distance is:
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the same.
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4 times longer.
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2 times longer.
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3 times longer.
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