COMBINATION PRACTICE TEST - MD CDL
11.
Which of the following is NOT part of the procedure to stop a trailer skid?
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Not using the hand brake
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Releasing the brakes
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Recognizing the skid
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Using the trailer hand brake to get traction back
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12.
When your vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called:
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skidding.
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off-tracking.
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path-breaking.
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front-rear tracking.
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13.
Which of the following will NOT help you prevent rollover?
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Driving slowly around turns.
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Using the controlled braking method.
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Keeping the cargo as close to the ground as possible.
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All of the above.
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14.
If during vehicle inspection a tire is too hot to touch, you should:
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let air out.
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immediately decrease air pressure.
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remain stopped until the tire cools off.
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make sure there is enough engine oil on the tires.
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15.
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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the service line valve close.
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air escaping from the open valve.
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a thumping sound.
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16.
To avoid rollovers, you should drive slowly:
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off ramps.
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around corners.
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on ramps.
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All of the above.
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17.
When backing a trailer on a curved path you should back towards:
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neither side (back up straight).
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the driver's side.
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the passenger's side.
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either side.
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18.
Emergency brakes are:
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required on all vehicles.
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not required on buses.
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not required on doubles.
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not required on commercial vehicles with air brakes.
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19.
Tests have shown that trucks with a high center of gravity are more likely to tip over, therefore you should:
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put the lightest parts of the cargo under the heaviest parts.
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distribute the cargo as low as possible.
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distribute the cargo so the majority of the weight is on the steering axle.
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All of the above.
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20.
Off-tracking is:
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when the tires lose their contact with the road and have little or no traction.
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when a vehicle makes a turn and the rear wheels of the trailer end up driving in a different path than the tractor and the front wheels of the trailer.
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when a vehicle towing a trailer skids, and the trailer pushes the towing vehicle from behind until it spins the vehicle around.
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None of the above.
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