WV CDL DOUBLES TRIPLES TEST - PRACTICE TEST
11.
Alcohol:
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impairs depth perception.
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improves muscle coordination.
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improves reaction time.
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does not affect judgement.
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12.
When preparing to make a right turn, you should NOT turn wide to the left as you start the turn. Why?
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A following driver may try to pass you on the left.
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Turning wide to the left can cause your vehicle to tilt.
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It makes the turn harder.
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A following driver may try to pass you on the right.
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13.
You must have at least 4/32 inch tread depth in every major groove on front tires and at least ___ inch on other tires.
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4/32
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2/32
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3/32
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1/32
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14.
The center of gravity of a trailer should be:
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at the front of the trailer.
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as high as possible.
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at the rear of the trailer.
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as low as possible.
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15.
Having ABS on only the trailer:
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still gives you more control over your vehicle during braking.
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makes the trailer more likely to swing out.
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makes the trailer more likely to roll over.
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is very dangerous.
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16.
On front tires, tread should be at least:
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1/16 inch
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4/16 inch
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2/32 inch
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4/32 inch
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17.
Which of the following is not a type of retarder?
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Hydraulic
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Pressure
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Electric
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Exhaust
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18.
You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:
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maintain your current speed, and apply the brakes when you reach 50 mph to gradually reduce your speed to 40 mph.
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apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
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apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.
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increase your speed to approximately 45 mph, and then apply release the brakes.
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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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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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The air could leak out of the trailer air tank, releasing its emergency brakes.
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None of the above.
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20.
To use the controlled braking method in an emergency, you should:
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apply the brakes when the wheels lock up.
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pump the brake pedal 3 times.
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apply the brakes as hard as you can without locking the wheels.
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apply your brakes all the way, and release the brakes when the wheels lock up.
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