TX CDL COMBINATION TEST - PRACTICE TEST
11.
Air brakes:
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should be used only when driving on wet roads.
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are prohibited on larger vehicles.
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can improve fuel efficiency.
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are an effective way to stop large and heavy vehicles.
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12.
The proper following distance for a 60-foot vehicle traveling at 50 mph is:
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7 seconds
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4 seconds
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6 seconds
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8 seconds
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13.
When parking, you should choose a spot:
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that allows you do a walk around inspection.
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that requires backing up.
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that allows you to pull forward when you leave.
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All of the above.
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14.
If you must make an emergency stop, you should:
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apply the brakes as hard as you can to lock them.
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brake in a way that will keep your vehicle in a straight line.
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use the hand brake before the brake pedal.
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None of the above.
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15.
During a walk around inspection of a combination vehicle, drivers should check that:
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the locking jaws are around the shank.
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all locking pins are present and locked in place.
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the glide plate is securely mounted to the trailer frame.
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All of the above.
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16.
Who is responsible for inspecting the cargo?
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The driver
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The motor carrier
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The shipper
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The person who loaded and secured the cargo
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17.
A bridge formula permits less maximum axle weight for axles that:
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are further apart than normal
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are closer together
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have a high center of gravity
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have poor weight balance
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18.
To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
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3 seconds; 50 feet
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1 second; 5 feet
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2 seconds; 10 feet
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1 second; 10 feet
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19.
If you get stuck on railroad tracks, you should:
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stay in the vehicle and call for help.
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have a helper push your vehicle.
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get out of the vehicle and away from the tracks.
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check the engine compartment quickly.
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20.
If the spring brakes do not release when you push the trailer air supply control, you should:
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pump the brakes.
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check the electrical cables.
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check the air line connections.
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rev or
lug the engine.
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