LOUISIANA DOUBLES TRIPLES PRACTICE CDL TEST
11.
As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
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a mechanical vibration.
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a thumping sound.
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air escaping from the open valve.
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the service line valve close.
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12.
In vehicles with air brakes, the air compressor governor:
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controls how much air the air compressor will pump into the air storage tanks.
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controls when the air compressor will pump air into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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None of the above.
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13.
When driving a truck with more than 1 trailer, drivers should:
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be especially careful in adverse conditions.
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look far ahead so they can slow down or change lanes when necessary.
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allow more following distance.
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All of the above.
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14.
If you go twice as fast, your stopping distance will increase by:
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eight times.
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two times.
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four times.
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ten times.
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15.
If a vehicle is equipped with ABS, when you start the engine:
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the spring brakes will come on.
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the ABS indicator light on the dash should come on and then turn off.
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the wheels will lock up.
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the trailer emergency brakes will come on.
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16.
On any upgrade, gravity:
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slows you down.
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speed you up.
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doesn't affect your speed.
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doubles your speed.
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17.
If there is a fire in your vehicle, do NOT:
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notify emergency services.
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park in an open area.
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park away from buildings and other vehicles.
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pull into a service station.
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18.
Which of the following statements about backing heavy vehicles is true?
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Back to the right side so that you can see better.
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You should avoid backing whenever you can.
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The helper should stand where you cannot see the helper.
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Always back as quickly as possible.
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19.
Who is responsible for inspecting the cargo?
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The shipper
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The person who loaded and secured the cargo
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The driver
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The motor carrier
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20.
To know how much space you should keep in front of you:
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estimate how many seconds it would take you to reach the vehicle ahead.
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estimate how many vehicle lengths there are between you and the vehicle ahead.
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wait until the vehicle ahead of you passes a clear landmark, then count off the seconds until you reach the same spot.
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None of the above.
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