DE CDL DOUBLES TRIPLES PRACTICE TEST
11.
You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
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looking for wheel speed sensor wires coming from the rear of your brakes.
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checking for a yellow ABS malfunction lamp on the instrument panel.
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checking if your vehicle was manufactured after March 1, 1998.
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All of the above.
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12.
ABS:
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may cause your wheels to lock when you break hard.
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helps you stop faster.
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improves your visibility at night.
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helps you avoid skids caused by over braking.
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13.
When driving on slippery roads, you should NOT:
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try to anticipate stops early.
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watch far enough ahead to keep a steady speed.
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use the engine brake.
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go slowly.
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14.
To know if your vehicle is equipped with ABS, look for:
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a yellow ABS malfunction lamps on the instrument panel.
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the ABS logo on the steering wheel.
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the ABS shipping paper.
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an ABS placard.
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15.
What factors can cause brakes to fade?
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Slippery surfaces and shaded areas.
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Dirt roads and in unpaved yards.
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Excessive heat and brakes out of adjustment.
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Gravel and tar.
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16.
Brake lag is:
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the distance your vehicle will travel, in ideal conditions, while you are braking.
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the time required for the air brakes to work after the brake pedal is pushed.
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the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
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the amount of air pressure required to stop the vehicle.
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17.
What can cause poor traction?
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Overloading the truck.
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Too little weight on the driving axles.
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Too much weight on the steering axle.
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All of the above.
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18.
When the temperature drops:
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bridges will freeze before the road will.
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bridges will not freeze.
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bridges usually freeze after other parts of the roadway.
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None of the above.
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19.
Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
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white.
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blue.
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red.
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yellow.
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20.
If coolant has to be added to a system without a recovery tank, you should:
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keep the engine running while adding coolant.
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never use thick cloth to touch the radiator cap.
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turn the radiator cap quickly to the first stop.
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wait until the engine has cooled before adding coolant.
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