AR CDL DOUBLES TRIPLES PRACTICE TEST
11.
Combination vehicles usually require _________ single commercial vehicles.
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the same level of skill as
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more driving skill than
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less driving skill than
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None of the above.
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12.
You should do an after-trip inspection:
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after each trip.
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after each stop.
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at least once a week.
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once a month.
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13.
Combination vehicles usually:
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require more driving skill than single CMVs.
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are easier to drive than single than single CMVs.
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are shorter than single than single CMVs.
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All of the above.
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14.
The tractor protection valve:
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supplies air to the trailer air tanks.
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keeps air in the tractor brake system should the trailer break away or develop a bad leak.
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works the trailer brakes.
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controls the emergency brakes on combination vehicles.
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15.
When coupling double trailers, if the second trailer does not have spring brakes, to set the trailer emergency brakes you should:
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1. Connect the emergency line 2. Drive the tractor close to the trailer 3. Disconnect the emergency line 4. Charge the trailer air tank.
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1. Connect the emergency line 2. Charge the trailer air tank. 3. Drive the tractor close to the trailer 4. Disconnect the emergency line.
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1. Drive the tractor close to the trailer 2. Connect the emergency line 3. Charge the trailer air tank 4. Disconnect the emergency line.
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1. Disconnect the emergency line 2. Drive the tractor close to the trailer 3. Charge the trailer air tank 4. Connect the emergency line.
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16.
If a load is placed on one side of the trailer:
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your brakes won't work.
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the steering axle weight will be too light to steer safely.
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a rollover is more likely.
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making turns may be easier.
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17.
Which of the following is not a type of retarder?
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Electric
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Exhaust
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Hydraulic
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Pressure
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18.
What is Gross Vehicle Weight?
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The total weight of a combination of vehicles excluding the load
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The total weight of a single vehicle, including its load
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The total weight of the cargo
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The total weight of a single vehicle, excluding its load
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19.
If you are feeling sleepy, you should:
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slow down and drive on the shoulder of the road.
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pull off the road and rest or take a nap.
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increase your speed to get to the destination quicker.
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None of the above.
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20.
Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:
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anti-lock brakes.
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a rear backup camera.
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GPS
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hydraulic brakes.
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