COMBINATION TEST FLORIDA - PRACTICE TEST
11.
Which of the following will NOT help you prevent rollover?
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Keeping the cargo as close to the ground as possible.
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Driving slowly around turns.
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Using the controlled braking method.
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All of the above.
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12.
If the spring brakes do not release when you push the trailer air supply control, you should:
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check the electrical cables.
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rev or
lug the engine.
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check the air line connections.
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pump the brakes.
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13.
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 thumping sound.
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the service line valve close.
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a mechanical vibration.
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air escaping from the open valve.
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14.
If there is a cargo fire in a van or box trailer, you should:
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keep the doors shut.
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enlist the help of bystanders.
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keep driving until you reach help.
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open the doors, especially if your cargo contains hazardous materials.
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15.
When you park trailers without spring brakes, you should use wheel chocks:
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to prevent the transmission from shifting up.
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to prevent air from escaping.
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to prevent overheating.
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to keep the trailer from moving.
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16.
To prevent rollover, you should:
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drive in the left lane.
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turn the engine off while turning.
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drive slowly around corners.
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drive on the shoulder of the road when possible.
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17.
Air brakes use ________ to make the brakes work.
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compressed gases
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compressed air
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compressed gas cylinders
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compressed oil
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18.
Combination vehicles usually require _________ single commercial vehicles.
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less driving skill than
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more driving skill than
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the same level of skill as
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None of the above.
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19.
Which of the following is NOT part of inspecting the coupling?
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Checking for enough clearance between the rear of the tractor frame and the landing gear.
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Making sure there is no space between the upper and the lower fifth-wheel
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Making sure the fifth-wheel jaws have closed around the shank of the kingpin.
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Checking that the locking lever is in the "lock" position
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20.
When going down grades, you should:
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rely solely on engine braking to reduce your speed.
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put the transmission in Neutral.
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downshift to a lower gear.
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shift up.
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