HI CDL PRACTICE TEST - GENERAL KNOWLEDGE

31. You must have at least ________ tread depth in every major groove on front tires.
1/16 inch
4/32 inch
1/2 inch
32. Which of the following is NOT a common cause of vehicle fires?
Flammable cargo
Headlights out of adjustment
Broken fuel pipe
33. Reaction distance is the distance you will continue to travel, in ideal conditions:
from the time your eyes see a hazard until your brain recognizes it.
before the vehicle comes to a complete stop.
before you physically hit the brakes.
34. Which of the following is not a braking system on a truck?
Steering brake
Service brake
Parking brake
35. The air compressor is connected to:
the radiator.
the transmission.
the engine.
36. You need to pay special attention to the space below your vehicle:
on dirt roads.
in school zones.
on multi-lane roads.
37. What are the two basic reasons for covering cargo?
To protect people from spilled cargo and the cargo from pilferage.
To protect people from spilled cargo and the cargo from weather.
To protect the cargo from weather and to avoid littering.
38. Before entering a curve, drivers should:
downshift to the right gear.
speed up.
drive on the shoulder.
39. When the temperature drops, which of the following surfaces will become icy first?
Curves
Off-ramps
Bridges
40. Texting while operating a commercial motor vehicle is:
acceptable if you are contacting your supervisor.
acceptable if you are contacting your dispacther.
illegal.
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