CDL COMBINATION PRACTICE TEST PENNSYLVANIA
11.
Containerized loads:
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are generally used for freight carried part way by rail or ship.
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should exceed gross weight and axle weight limits.
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must be inspected before and after the trip.
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All of the above.
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12.
To avoid rollovers, you should drive slowly:
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on ramps.
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off ramps.
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around corners.
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All of the above.
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13.
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 so the majority of the weight is on the steering axle.
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distribute the cargo as low as possible.
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All of the above.
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14.
You are driving a heavy vehicle with a manual transmission, and you have to stop on the shoulder while driving on an uphill grade. When putting your vehicle back in motion up the grade, you should:
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use the parking brake to hold the vehicle until the clutch engages.
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shift down to a speed that you can control without using the brakes.
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keep the clutch slipping while slowly accelerating.
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partly engage the clutch before you take your right foot off the brake.
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15.
After starting the engine, the ABS light stays on. This means:
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the ABS oil level is not adequate.
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the ABS is working properly.
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the ABS is in Neutral.
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the ABS is not working properly.
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16.
What is a tractor jackknife?
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When a drive-wheel skid lets the trailer push the towing vehicle sideways.
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When the rear wheels of a trailer lock up, and the tractor swings around.
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When the wheels of a trailer lock up, and the trailer swings around.
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None of the above.
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17.
The iron trailer supports are up, and the full weight of the trailer is resting on the tractor. Make sure:
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there is enough clearance between the upper and lower fifth wheel.
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you are in a low enough gear.
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the safety latch is not engaged.
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there is enough clearance between the rear of the tractor frame and the landing gear.
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18.
To unlock the fifth wheel, pull the release handle to the _______ position.
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closed
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neutral
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sixth
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open
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19.
An Anti-lock Braking System (ABS):
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increases your normal braking capability.
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keeps your wheels from locking up when you brake hard.
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always shortens your stopping distance.
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lets you drive faster.
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20.
Placards must be at least _____ inches square.
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9.84
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5
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21.2
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12.6
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