IA CDL COMBINATION TEST - PRACTICE TEST
11.
Do NOT use the parking brakes:
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when you leave your vehicle.
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if the brakes are very hot.
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when you park for less than two hours.
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12.
If you cannot make a right turn without entering another traffic lane, you should:
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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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swing wide to the left before starting the turn.
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13.
Dual tires:
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should come in contact with each other whenever possible.
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should always come in contact with each other.
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should not come in contact with each other.
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14.
When coupling a tractor to a semi-trailer, after checking if the fifth-wheel is in proper position for coupling you should:
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connect the electrical cord and check the air lines.
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make sure the area around the vehicle is clear and the trailer wheels are chocked.
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connect the air lines to the trailer.
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15.
Which of these statements is true?
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Large combination vehicles take longer to stop when they are fully loaded than when they are empty.
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Trailer skids are more likely to happen when the trailer is empty or lightly loaded.
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"Bobtail" tractors can take longer to stop than a combination vehicle loaded to maximum gross weight.
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16.
The trailer hand valve should be used only:
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when the trailer is fully loaded.
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in driving to prevent skids.
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to test the trailer brakes.
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17.
To prevent a rollover, the driver should:
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drive on the shoulder if possible.
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make quick lane changes if possible.
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drive slowly around corners, on ramps, and off ramps.
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18.
If a load is placed on one side of the trailer:
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a rollover is more likely.
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making turns may be easier.
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the steering axle weight will be too light to steer safely.
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19.
Which of the following is NOT a step in backing up with a trailer?
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Looking at your line of travel before you begin
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Checking the outside mirrors on both sides frequently
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Backing quickly when the path is straight
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20.
If your truck has automatic transmission, you should downshift:
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when going down grades.
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whenever road conditions allow.
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after entering a curve.
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