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CDL General Knowledge 1

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  • You must park on a side of a level, straight, four-lane divided highway. Where should you place the reflective triangles?
    One 10ft of front, one 100ft to rear, one 200ft to rear
    One 10ft of rear, one 100ft to rear, one 200ft to rear
    One 10ft of rear, one 100ft to rear, one 100ft to front
  • TRUE or FALSE? (re: downshifting) When you downshift for a hill, you should do so after you start down the hill.
    TRUE
    FALSE
  • A key principle to remember about loading cargo is to keep the load:
    To the front.
    To the rear.
    Balanced in the cargo area.
  • Which of these statements about certain types of cargo is true?
    Oversize loads can be hauled without special permit
    Unstable loads require extra caution on curves
    When liquids are hauled, the tank should always be full
  • You should stop driving:
    After 5 hours.
    After 9 hours.
    Whenever you become sleepy.
  • The purpose of the retarders is to:
    Apply extra braking power to the non-drive axels.
    Help prevent skids.
    Help slow the vehicle while driving and reduce brake wear.
  • You are checking your wheels and rims for a pre-trip inspection. Which of these statements is true?
    A vehicle can be safely driven with one missing lug nut
    Rust around wheel nuts may mean that they are loose
    Mismatched lock rings can be used on the same vehicle.
  • How far should a driver look ahead of the vehicle while driving?
    12-15 seconds.
    18-21 seconds.
    5-8 seconds.
  • TRUE or FALSE? A half-hour break for coffee will do more to keep you alert than a half-hour nap.
    TRUE
    FALSE
  • You are driving a heavy vehicle. You must exit a highway using an off-ramp that curves downhill. You should:
    Slow down to a safe speed before the curve.
    Wait until you are in the curve before downshifting.
    Slow down to a safe speed before the curve.
  • You are driving on a straight, level highway at 50mph. There are no vehicles in front of you. Suddenly a tire blew out of your vehicle, what should you do first?
    Begin emergency braking
    Stay off the brake until the vehicle has slowed down
    Begin light braking
  • How do you correct a drive-wheel acceleration skid?
    Apply more power to the wheels.
    Downshift.
    Stop accelerating.
  • Which of these is NOT a good rule to follow when caring for injured persons at an accident scene?
    If a qualified person is helping them, stay out of the way
    Move severely injured person if there is a danger
    Keep injured persons cool.
  • If you need to leave the road in a traffic emergency, you should:
    Avoid shoulder because most will not support a large vehicle
    Avoid breaking until your speed has dropped to about 20 mph
    Try to get all wheels off the pavement
  • You should avoid driving through deep puddles or flowing water. But if you must, which of these steps can help to keep your brakes working?
    Turning on your brake heater.
    Gently putting on the brakes while driving through the water
    Applying hard pressure on both the brake pedal & accelerator
  • Controlled braking:
    Is used to keep a vehicle in a straight line while braking.
    Can be used when you are turning sharply.
    Involves locking the wheels for a short period of time.
  • Which of these is a good thing to remember when crossing or entering traffic with a heavy vehicle?
    Heavy vehicles need larger gaps in traffic than cars.
    You can count on other drivers to move out of your way
    Pull the vehicle partway across the road and block one lane
  • You are driving a heavy vehicle with a manual transmission. You have to stop the vehicle on the shoulder while driving on an uphill grade. Which of these is a good rule to follow when putting it back in motion up the grade?
    Use the parking brake to hold the vehicle til clutch engages
    Let the vehicle roll backwards before you engage the clutch
    Keep the clutch slipping while slowly accelerating.
  • TRUE or FALSE? When driving at night, you should adjust your speed to keep your stopping distance within your sight distance.
    TRUE
    FALSE
  • If you are being tailgated, you should:
    Signal the tailgater when it is safe to pass you.
    Increase your following distance.
    Flash your brake lights.
  • As the blood alcohol concentration (BAC) goes up, what happens?
    The drinker more clearly sees how alcohol is affecting them
    The effects of alcohol decrease.
    Judgment and self-control are affected.
  • If a straight vehicle (not a trailer or articulation) goes into front-wheel skid, it will:
    Go straight ahead even if the steering wheel is turned
    Slide sideways and spin out
    Go straight ahead but will turn if you turn the whe
  • You are checking tires for a pre-trip inspection. Which of these statements is true?
    2/32-inch tread depth is safe for front tires
    Radial and bias-ply tires can be used together
    Tires of mismatched sizes should not be used together
  • Your vehicle has hydraulic brakes. While traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?
    The parking brake will not work either
    Shifting into neutral will help to slow the vehicle.
    Pumping the brake pedal may bring the pressure up
  • Which of these is a good thing to remember about using mirrors?
    There are blind spots that your mirror cannot show.
    You should look at a mirror for several seconds at a time.
    Convex mirrors make things look larger and closer
  • Hydroplaning:
    Cannot occur when driving through a puddle.
    Only occurs when there is a lot of water.
    Is more likely if tire pressure is low.
  • You are driving a vehicle at 55 mph on dry pavement. About how much total stopping distance will you need to bring it to a stop?
    Half the length of the football field.
    The length of a football field.
    Twice the length of the football field.
  • Which of these statements about cold weather driving is true?
    An engine cannot overheat when the weather is very cold.
    Windshield washer antifreeze should be used.
    Exhaust system leaks are less dangerous in cold weather.
  • Which of these is a good thing to do when steering to avoid a crash?
    Don’t turn any more than needed to clear what is in your way
    Apply the brakes while turning.
    Steer with one hand so that you can turn the wheel quicly
  • According to the driver’s manual, why should you limit the use of your horn?
    You should always keep firm grip on the steering wheel
    The horn is not a good way to let others know you are there.
    It can startle other drivers.
  • You are driving a truck with a manual transmission. What gear will you probably have to use to take a long, steep downhill grade?
    A lower gear than you would use to climb the hill
    The same gear as you would use to climb the hill
    A higher gear than you would use to climb the hill
  • Which of these statements about drugs is true?
    Amphetamines can be used to help the driver stay alert.
    Use of drugs can lead to an accident and/or arrest.
    A driver can use any prescription drug while driving.
  • For your safety, when setting out reflective triangles you should:
    Turn on your flashers.
    Keep them out of sight while you walk to where you set them
    Hold the triangles between yourself and oncoming traffic.
  • You do not have a hazardous materials endorsement on your commercials driver’s license. You are asked to deliver hazardous materials in a placarded vehicle. You should:
    Haul the load, but file a report with the DOT after the trip
    Haul the load to the nearest place for a Hazmat driver
    Refuse to haul the load.