GENERAL KNOWLEDGE CDL TEST NEBRASKA - PRACTICE TEST

21. When you discover a fire, if the trailer doors are hot you should not open them because:
with air many fires do less damage.
you should use the fire extinguisher on the door.
opening the doors lets air in and may make the fire flare up.
the temperature of the trailer should not be changed in any way.
22. If you have convex mirrors, be aware that:
in a convex mirror objects appears larger than they really are.
everything appears smaller in a convex mirror than it would if you were looking at it directly.
objects seem closer than they really are.
objects may appear to be faster than they really are.
23. If a load is 50 feet long, the minimum number of tie-downs required is:
5
4
3
10
24. Passive railroad crossings:
have at least one traffic control device.
do not have traffic control devices.
usually have a person directing traffic.
should never be crossed using a CMV.
25. Which of the following is NOT true about escape ramps?
Any driver who loses brakes going downhill should avoid using an escape ramp, if possible.
Escape ramps use a long bed of loose, soft material to slow runaway vehicles.
Escape ramps are made to stop runaway vehicles safely.
Escape ramps are found on many mountain downgrades.
26. Cargo tie-downs are used to:
prevent skidding.
keep cargo from shifting or falling.
prevent freezing.
prevent right-turn accidents.
27. Emergency brakes must be held on by:
hydraulic pressure.
air pressure.
dynamic pressure.
mechanical force.
28. It is important to shift gears correctly to keep:
the engine oil flowing.
the engine warm.
control of the vehicle.
the engine cool.
29. When you are driving in heavy traffic, the safest thing to do is to:
drive at the posted speed limit.
drive 10 mph below the speed limit.
drive 10 mph below the speed of other traffic.
drive at the speed of other traffic (without going at an illegal or unsafe speed).
30. Unless excepted, shipping papers must list:
a proper description of the truck.
the address of the driver.
the colors of the materials.
an emergency response telephone number.
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