VA CDL DOUBLES TRIPLES PRACTICE TEST
11.
You are driving a double. Before entering traffic, you should:
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turn on your headlights.
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make sure you have a large enough gap before entering or crossing traffic.
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assume there is enough room to merge into traffic.
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12.
When should you downshift automatic transmissions?
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When going down steep grades.
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When you start to get drowsy.
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13.
Too much weight on the steering axle can cause:
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poor traction.
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better handling.
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hard steering and damage to the steering axle and tires.
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14.
If your brakes fail on a steep mountain downgrade, you should:
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use an escape ramp if it is available.
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go right if the shoulder is clear.
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leave the road immediately.
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15.
If you will be transporting hazardous materials that require placards, you must:
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transport the materials at night only.
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obtain a special transit permit.
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obtain a hazardous materials endorsement.
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16.
What is Gross Vehicle Weight?
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The total weight of the cargo
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The total weight of a single vehicle, including its load
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The total weight of a single vehicle, excluding its load
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17.
Watch out for black ice:
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any time the temperature is below freezing and the road looks wet.
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when the temperature is above freezing and the road is dry.
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when it is snowing.
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18.
On front tires, tread should be at least:
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4/32 inch
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4/16 inch
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2/32 inch
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19.
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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You may not notice a major leak in the service line until you try to put the brakes on.
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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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20.
The application pressure gauge:
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shows how much air pressure is being applied to the brakes.
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tells you how much pressure is in the air tanks.
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protects the tank and the rest of the system from too much pressure.
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