WEST VIRGINIA CDL COMBINATION PRACTICE TEST
11.
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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2/32
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4/32
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3/32
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1/32
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12.
Anti-lock brakes:
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help you stop faster.
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reduce the perception distance.
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increase your stopping distance.
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keep your brakes from locking up when you brake hard.
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13.
Passive railroad crossings:
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should never be crossed using a CMV.
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have at least one traffic control device.
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do not have traffic control devices.
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usually have a person directing traffic.
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14.
Which of the following is NOT a good rule for using turn signals?
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Cancel your signal after you have turned.
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Signal well before you turn.
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Put your turn signal on after the turn.
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Signal continuously until you have completed the turn.
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15.
When you have to back, you should always try to back toward the driver's side. Why?
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Backing toward the left side is more dangerous.
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You can see better and watch the rear of your vehicle by looking out the side window.
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You can watch the front of your vehicle by looking out the side window.
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All of the above.
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16.
If you unlock the pintle hook with the dolly still under the rear trailer:
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your vehicle might roll away.
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steam and boiling water can spray under pressure.
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the dolly tow bar may fly up.
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the brakes could be damaged by the combined forces of the springs and the air pressure.
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17.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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Wheel speed sensor wires are coming from the back of the brakes.
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It has yellow ABS malfunction lamps.
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It was built after March 1, 1998.
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The letters "ABS" are printed on the side of the steering wheel.
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18.
The emergency air line does NOT:
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control the emergency brakes on combination vehicles.
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supply air to the trailer air tanks.
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cause the tractor protection valve to close when the emergency line loses pressure.
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pump air into the relay valves, allowing the trailer brakes to be applied more quickly.
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19.
Blocking and bracing are:
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coupling devices used to connect the service air lines from the truck or tractor to the trailer.
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used to keep cargo from sliding and to prevent movement of cargo.
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driving techniques used to regain control when your drive wheels start to skid.
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None of the above.
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20.
After a tire has been changed, you should:
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decrease tire pressure.
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deflate the tire to 15 psi.
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stop a short while later and check that the nuts are tight.
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wait at least 30 minutes before driving.
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