DMV Class B License: General
Knowledge Test 2024/25
CDL medical certificates must be renewed every:
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a) Year
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b) Two Years
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c) Four years - b) Two Years
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II What should you do when you are driving at night?
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a) Make sure you are driving slow enough so you can stop within the range of your
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headlights in an emergency
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b) Roll down your windows so that the fresh air will help keep you awake
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c) If you are sleepy, drink coffee or other caffeine products - a) Make sure you are driving
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slow enough so you can stop within the range of your headlights in an emergency
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II What are three things that add up to the total stopping distance for your truck or bus?
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a) Attention distance, Reaction distance, slowing distance
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b) Observation distance, response distance, braking distance
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c) Perception distance, reaction distance, braking distance - c) Perception distance,
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reaction distance, breaking distance
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You are checking your steering and exhaust systems in a pre-trip inspection. Which of
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these problems, if found, should be fixed before the vehicle is driven?
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a) Oil on the rod
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b) Black smoke from the exhaust pipe
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c) Steering wheel play of more than 10 percent (2'' on a 20'' steering wheel) - c) Steering
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wheel play of more than 10 percent (2'' on a 20'' steering wheel)
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II The purpose of retarders is to:
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a) Apply extra braking power to the non-drive vehicles
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b) Help prevent skids
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, c) Help slow the vehicle while driving and reduce brake wear - c) Help slow the vehicle
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while driving and reduce brake wear
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II Which of these is especially true about your tires in hot weather?
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a) You should check tire mounting and air pressure before driving
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b) If the tire is too hot to touch, you should hose it down with water
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c) A small amount of air should be let out so air pressure remains steady - a) You should
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check tire mounting and air pressure before driving
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II Which of these is usually true about driving in tunnels?
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a) Headlights are required by law
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b) There may be strong winds when exiting
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c) Speeds are limited to 30 MPH or less - b) There may be strong winds when exiting
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II When driving through work zones, you should:
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a) Reduce speed only if workers are close to the roadway
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b) Turn on your parking lights
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c) Watch for sharp pavement drop-off - c) Watch for sharp pavement drop-off
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II A pre-trip inspection should be completed:
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a) At least once a week
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b) If any problems occurred the last time the vehicle was operated
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c) Before operating the vehicle - c) Before operating the vehicle
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II Water can be safely used on which of these fires?
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a) Electrical
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b) Gasoline
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c) Neither of the above - c) Neither of the above
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II What should you do when your vehicle hydroplanes?
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