CDL GENERAL KNOWLEDGE TEST (LA) - PRACTICE TEST
11.
When you push the brake pedal down, air brakes work:
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only when ABS is working.
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after a short delay.
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after about 15 seconds.
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immediately.
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12.
When driving in fog, drivers should:
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use low beams.
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use windshield washer antifreeze.
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use the windshield wipers.
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use high beams.
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13.
Which of the following is true about lanes changes?
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When changing lanes you should check your mirros as usual.
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You should not check yourmirrors before you change lanes.
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Lane changes require more than regular mirror checks.
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Lane changes should always be avoided.
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14.
The wheels of a large combination vehicle are more likely to lock up when:
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the trailer has new tires.
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the vehicle is lightly loaded.
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the vehicle is heavily loaded.
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you are traveling in very hot weather.
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15.
The tire load for each tire is stated:
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on the vehicle's operator manual.
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on the tread of the tire.
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on the side of the tire.
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on the inside of the tire.
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16.
A low air pressure warning signal:
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is required on all vehicles without air brakes.
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is required on vehicles with air brakes.
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is optional on vehicles with air brakes.
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None of the above.
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17.
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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18.
When you have to back, you should always try to back toward the driver's side because:
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backing toward the left side is more dangerous.
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it feels more natural.
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you can see better and watch the rear of your vehicle out the side window.
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None of the above.
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19.
You must use ________ as the principal way of controlling your speed on downgrades.
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the brake pedal
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"Maximum Safe Speed"
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controlled braking
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the braking effect of the engine
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20.
When backing, it is important to use a helper whenever possible. Why?
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Because you cannot see everything behind your vehicle.
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Because it's required by law.
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To make sure you don't damage your truck.
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All the above.
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