ILLINOIS CDL DOUBLES TRIPLES PRACTICE TEST
11.
On any upgrade, _________ – the more you will have to use lower gears to climb hills or mountains.
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the steeper the grade
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the heavier the load
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the longer the grade
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All of the above.
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12.
The trailer hand valve should:
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never be used for parking.
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be used in driving.
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never be used to test the trailer brakes.
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All of the above.
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13.
The application pressure gauge:
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protects the tank and the rest of the system from too much pressure.
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stops the compressor from pumping air.
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tells you how much pressure is in the air tanks.
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shows how much air pressure is being applied to the brakes.
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14.
When you see you will need to slow down, you can warn drivers behind you by:
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slamming on the brakes.
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turning on the right turn signal.
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making gestures.
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tapping the brakes a few times.
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15.
When more than one semitrailer is behind the tractor:
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the more heavily loaded trailer should be disconnected.
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the lighter trailer should be in the rear.
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the more heavily loaded semitrailer should be in the rear.
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The order doesn't matter.
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16.
When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
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every registered motor vehicle must have at least one mirror.
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there are blind spots that your mirrors cannot show you.
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you should check your after the start of any trip to make sure they are properly adjusted.
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convex mirrors make things look larger and closer than they really are.
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17.
Which of the following is NOT true?
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ABS won't compensate for poor brake maintenance.
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ABS will change the way you normally brake.
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ABS only comes into play when a wheel would have locked up because of over braking.
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ABS won't compensate for bad brakes.
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18.
Which of these statements about brakes is true?
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The lighter the vehicle, the more heat the brakes absorb to stop it.
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To stop, the brake shoes and linings are pushed against the outside of the drum.
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Brake fade does not result from excessive heat.
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None of the above.
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19.
When you discover a fire, if the trailer doors are hot you should not open them because:
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the temperature of the trailer should not be changed in any way.
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opening the doors lets air in and may make the fire flare up.
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with air many fires do less damage.
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you should use the fire extinguisher on the door.
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20.
When should you be particularly careful about high winds?
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When driving at night
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When emerging from a tunnel
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When driving in winter
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When going downhill
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