ID CDL COMBINATION PRACTICE TEST
11.
If your trailer starts to skid, you should:
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release the brakes to get traction back.
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keep the rear of your vehicle close to the curb.
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use the trailer hand brake (if you have one) to straighten out the rig.
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12.
Inspecting the fifth-wheel does NOT include:
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backing until the fifth-wheel just touches the trailer.
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checking that there are no cracks in the frame.
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checking for missing or damaged parts.
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13.
The tire load rating is stated:
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on the side of each tire.
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on each axle.
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inside the suspension system.
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14.
Most heavy vehicles require ________ change gears.
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double shifting
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single clutching
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double clutching
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15.
Emergency brakes are:
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not required on doubles.
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not required on buses.
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required on all vehicles.
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16.
How can you tell if a converter dollie has ABS?
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There is an ABS plaque on the right side of the dolly.
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There is a yellow lamp on the left side of the dolly.
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There is a red lamp on the left side of the dolly.
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17.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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The letters "ABS" are printed on the side of the steering wheel.
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It was built after March 1, 1998.
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It has yellow ABS malfunction lamps.
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18.
When you back under a trailer:
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back the tractor slowly.
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use lowest reverse gear.
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All of the above.
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19.
During a trip:
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you should watch gauges for signs of trouble.
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you should not watch gauges as they can be misleading.
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you should watch gauges to make sure that valve caps are not missing.
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20.
If you cannot make a right turn without entering another traffic lane, you should:
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swing wide to the left before starting the turn.
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turn wide as you complete the turn.
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turn wide before you start the turn.
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