IL CDL COMBINATION PRACTICE TEST
11.
What factors can cause brakes to fail or fade?
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Excessive use of the service brakes
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Not relying on the engine braking effect
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Brakes out of adjustment
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All of the above.
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12.
When you are uncoupling a loaded trailer, lower the landing gear until:
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makes contact with the ground, and leave the trailer off the fifth wheel.
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it makes firm contact with the ground.
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the pressure in the system is above 55 psi.
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the tractor frame is under the trailer.
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13.
The crack-the-whip effect:
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can turn the trailer over.
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can cause problems for drivers coming toward you.
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the ends of some vehicles to drag.
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can cause a vehicle to tilt.
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14.
What is a pull up when referring to truck driving?
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A specific maneuver used to decelerate smoothly in the exit lane.
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When a driver stops and pulls forward to get a better position.
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A driving maneuver used to pull your vehicle over to the side of the road and stop.
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Using the speedometer to know when to shift up.
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15.
What is the proper following distance for a 40 foot truck traveling at 35 mph?
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4 seconds
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12 seconds
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10 seconds
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5 seconds
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16.
Which of the following is most likely to roll over?
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The rear trailer of a double
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The rear trailer of a triple
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The middle trailer of a triple
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The front trailer of a double
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17.
When more cargo is piled up in a truck, the truck becomes easier to turn over. Fully loaded rigs are _________ to roll over in a crash than empty rigs.
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five times more likely
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less likely
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ten times more likely
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three times more likely
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18.
The trailer hand valve should:
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be used in driving.
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never be used for parking.
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never be used to test the trailer brakes.
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All of the above.
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19.
If the ABS is not working:
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you still have normal brake functions.
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the vehicle will have weak brakes.
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the vehicle will have no brakes.
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None of the above.
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20.
What should you do if your vehicle gets stuck on the railroad tracks?
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Turn on the emergency flashers and call 911.
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Call 911, then get out of the vehicle and away from the tracks.
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Stay inside the vehicle and call 911.
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Get out of the vehicle and away from the tracks as quickly as possible, then call 911.
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