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CDL General Knowledge 5

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  • Medicine used to treat the common cold:
    May be used while driving if you use half a regular dose
    Often makes you sleepy and should not be used while driving.
    Should only be used when driving at daytime.
  • The tread depth on front steering wheel tires should be:
    More than 6/32 inch
    Not less than 4/32 inch
    Not less than 2/32 inch
  • Which of these is true about driving in a tunnel?
    Headlights are required by law.
    There may be strong winds when exiting.
    Emergency flashers are required by law.
  • You should wear a seat belt in a moving vehicle:
    All the time.
    Only when you are driving.
    Only when you are on a highway.
  • Which of these statements about cargo loading is true?
    A state law dictates legal weight limit.
    The legal maximum weight allowed by the state is always safe
  • How much space in front of you is needed while driving on a highway?
    1 second for each 10 feet of vehicle length.
    1 second for each 20 feet of vehicle length.
    1 second for each 30 feet of vehicle length.
  • Which of these rigs has a higher chance to off-track while making a turn?
    Tractor with two 27-feet trailers.
    53-feet straight truck.
    Tractor with a 45-feet trailer.
  • Brake drums (or discs) must not have cracks longer than ____ the width of the friction area.
    1/10
    1/3
    1/2
  • What should you do if a car coming toward you at nights keeps its high beams on?
    Slow down and look straight ahead in your lane.
    Look to the right lane or edge markings of the road.
    Flash your high beams quickly at the other driver.
  • The engine brake effect is greater when the engine is ____ governed RPM and the transmission is on a ____ gear.
    Near, lower
    Above, lower
    Below, higher
  • You should use your horn when:
    If it helps to avoid a crash.
    A car is in your way.
    You want to change a lane.
  • You are driving in an area with few streetlights, if you cannot see well with your headlights, which of the actions may help:
    Turn interior lights on and adjust your instrument lights
    Use high beams when legal and keep your interior lights off
    Find another route that's better lit even if it's out of way
  • What three distances build up the total stopping distance of your truck or bus?
    Perception distance, reaction distance, and braking distance
    Respond distance, observation distance, and braking distance
    Attention distance, reaction distance, and slowing distance.
  • What is true about bad weather and driving conditions?
    When the temperature drops bridges freeze before the road
    Road is more slippery when rain continues than when it begin
    Conditions are more dangerous when temp is above freezing
  • To determine blood alcohol concentration level for a person, it is necessary to know:
    Their weight.
    How often they drink alcohol.
    Their age.
  • If you must cross into the oncoming lane to make a turn, you should:
    Complete your turn without stopping.
    Watch for oncoming traffic.
    Back to allow the oncoming traffic to pass.
  • When you are passing a vehicle, pedestrian, or bicycle you should assume that:
    They may be moving to your traffic lane.
    They see your vehicle.
    They know you are to pass.
  • Which of these actions are NOT recommended for a left turn?
    Start at the inside lane and swing right as you turn.
    Use a right-hand turn lane if there are two turning lanes.
    Start your turn at the center of the intersection.
  • Your vehicle will be put out of service if _____ or more leaves in any leaf spring are missing.
    1/3
    1/4
    1/2
  • When merging:
    Check mirrors to make sure the rear of your vehicle is clear
    Use your mirrors to ensure gap in traffic is large enough
    Assume other drivers will allow you to merge.
  • Most serious skids result from:
    Turning too sharply.
    An uneven load.
    Driving too fast for conditions.
  • The primary cause of fatal crashes is:
    Driving too fast
    Driving at night
    Driving while eating
  • Which of these statements about pre-trip inspection is true?
    When parking on street, walk so you face away from traffic
    Leave key in the ignition so you do not lose it
    If you need to tilt a cab, secure loose things
  • Can state inspectors inspect your truck or bus?
    No.
    Yes, but cannot put you out of service.
    Yes, and they can put you out of service.
  • Which of these is the proper signal to change lane?
    Signal before the change and move over quickly.
    Signal early and change lane slowly and smoothly.
    Signal after you begin change and cross over slowly.
  • You are driving a 40-foot vehicle at 55 mph. the road is dry and visibility is good. What is the least amount of space that you need to have in front of your vehicle?
    6 seconds
    5 seconds
    4 seconds
  • A car suddenly cuts in front of you, creating a hazard. Which of these actions should you NOT take?
    Signal and change lanes to avoid hazard.
    Slow down to prevent a crash.
    Honk your horn and stay close behind the car.
  • Which of these statements about the hazard vehicle fire is true?
    Carrying a fully charged fire extinguisher may prevent fire
    Under inflated tires cannot cause a vehicle fire.
    Poor cargo ventilation may cause cargo to catch on fire.
  • You are driving a heavy vehicle. You must exit a highway using an off-ramp that curves downhill. You should:
    Slow down to 15 mph below the posted speed limit.
    Slow down to a safe speed before the turn.
    Slow to the posted speed limit for the off-ramp.
  • A hazard:
    Does not need to be seen.
    Cannot turn into an emergency.
    Is any road condition or road user that is possible danger
  • Which of these should you NOT do in an emergency situation?
    Brake in a way that keeps your vehicle in stright line
    Avoid using the brakes until your speed is down to 20mph
    It is not important how you brake in an emergency.
  • Implied consent means:
    You're giving consent to inspect your vehicle for alcohol
    You're giving consent to be tested for alcohol in your blood
    It is understood that you may drink alcohol now and then.
  • Which of these is not required knowledge for drivers seeking a hazardous material endorsement?
    Which products can be loaded together.
    When to use the placards.
    Basic chemistry.
  • What should be true about other drivers:
    Mail or delivery trucks are professionals &don't pose hazard
    Short term/daily rental truck drivers aren't use to truck
    Drivers who use turn signals should always be trusted
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