CDL General Knowledge MCQ (A, B, C)
1–20
- What does CDL stand for?
A. Car Driving License
B. Commercial Driver’s License
C. Central Driving Law
Answer: B - What is the purpose of a pre-trip inspection?
A. Wash the truck
B. Check vehicle safety
C. Save fuel
Answer: B - Before changing lanes, you should:
A. Honk only
B. Speed up
C. Check mirrors and blind spots
Answer: C - CDL legal BAC limit is:
A. 0.08%
B. 0.04%
C. 0.10%
Answer: B - A red traffic light means:
A. Slow down
B. Speed up
C. Stop
Answer: C - Hydroplaning happens when:
A. Brakes fail
B. Tires lose road contact on water
C. Engine stops
Answer: B
- If brakes fail, you should:
A. Panic
B. Downshift gears
C. Accelerate
Answer: B - Safest way to make a turn:
A. Brake during turn
B. Speed through
C. Slow down before turn
Answer: C - Tailgating means:
A. Following too closely
B. Driving slowly
C. Parking badly
Answer: A - At railroad crossings you should:
A. Race across
B. Stop on tracks
C. Slow, look, and listen
Answer: C - Mirrors are used to:
A. Decorate vehicle
B. Watch surrounding traffic
C. Measure speed
Answer: B - Speeding is dangerous because it:
A. Saves fuel
B. Reduces reaction time
C. Improves braking
Answer: B - Yellow traffic light means:
A. Stop if safe
B. Go faster
C. Ignore it
Answer: A - After starting engine, first check:
A. Music system
B. Tires
C. Gauges and warning lights
Answer: C - Defensive driving means:
A. Aggressive driving
B. Careful safe driving
C. Racing
Answer: B - Most skids are caused by:
A. Slow driving
B. Fast driving
C. Good weather
Answer: B - During heavy fog you should:
A. Use high beams
B. Speed up
C. Use low beams and slow down
Answer: C - Air brakes are mainly used on:
A. Motorcycles
B. Large commercial vehicles
C. Bicycles
Answer: B - If a tire blows out:
A. Slam brakes
B. Hold steering firmly
C. Jump out
Answer: B - Cargo should be secured to:
A. Reduce weight
B. Prevent shifting
C. Increase speed
Answer: B
21–40
- Hand valve is used for:
A. Steering
B. Testing trailer brakes
C. Fuel control
Answer: B - ABS stands for:
A. Automatic Brake System
B. Anti-lock Braking System
C. Air Brake Safety
Answer: B - Before backing a truck:
A. Honk loudly
B. Speed up
C. Check area behind vehicle
Answer: C - Black ice is:
A. Thick snow
B. Invisible road ice
C. Mud
Answer: B - Turn signals are used to:
A. Warn other drivers
B. Wash windows
C. Start engine
Answer: A - Stopping distance means:
A. Parking space
B. Distance needed to stop
C. Tire length
Answer: B - If sleepy while driving:
A. Drink soda only
B. Continue driving
C. Stop and rest
Answer: C - Distracted driving increases:
A. Fuel mileage
B. Accident risk
C. Tire life
Answer: B - Flashing red light means:
A. Yield
B. Slow down
C. Complete stop
Answer: C - Engine braking uses:
A. Lower gears
B. Horn
C. Mirrors
Answer: A - Blind spots are dangerous because:
A. Vehicles cannot be seen
B. Roads are narrow
C. Lights are bright
Answer: A - Reflective triangles are used to:
A. Decorate truck
B. Warn other drivers
C. Measure distance
Answer: B - Headlights should be used:
A. Only daytime
B. Only parking
C. At night or low visibility
Answer: C - Before going downhill you should:
A. Shift lower gear
B. Turn engine off
C. Accelerate
Answer: A - Seatbelts help to:
A. Improve radio signal
B. Protect driver
C. Increase speed
Answer: B - Jackknifing happens when:
A. Trailer swings sharply
B. Engine fails
C. Tire explodes
Answer: A - Under the hood check:
A. Oil and coolant
B. Seat covers
C. Mirrors
Answer: A - Stop sign means:
A. Slow down only
B. Complete stop
C. Turn left
Answer: B - In high winds you should:
A. Drive faster
B. Reduce speed
C. Ignore wind
Answer: B - Hazard lights are used to:
A. Play music
B. Warn traffic of danger
C. Open doors
Answer: B
CDL General Knowledge MCQ (41–60)
- The Smith System is a:
A. Driving safety system
B. Fuel system
C. Brake system
Answer: A - If brakes get wet, you should:
A. Drive fast
B. Test brakes gently
C. Turn engine off
Answer: B - Overloading a truck is dangerous because it:
A. Improves control
B. Helps braking
C. Affects braking and control
Answer: C - In heavy traffic you should:
A. Follow closely
B. Increase following distance
C. Speed up
Answer: B - Green traffic light means:
A. Stop
B. Go if safe
C. Reverse
Answer: B - A rollover accident means:
A. Vehicle tips over
B. Flat tire
C. Brake failure
Answer: A - Emergency exits on buses are used for:
A. Storage
B. Quick evacuation
C. Fuel filling
Answer: B - After an accident you should:
A. Leave immediately
B. Secure the scene and report it
C. Hide the vehicle
Answer: B - Mirrors should be adjusted to:
A. Reduce blind spots
B. Improve speed
C. Save fuel
Answer: A - Sharp turns are dangerous because they may cause:
A. Better handling
B. Rollover
C. Faster driving
Answer: B - The clutch is used for:
A. Changing gears
B. Steering
C. Cooling engine
Answer: A - Before entering traffic you should:
A. Close eyes
B. Signal and check traffic
C. Honk continuously
Answer: B - Mud flaps help to:
A. Reduce road spray
B. Increase speed
C. Cool brakes
Answer: A - Road rage means:
A. Careful driving
B. Aggressive driving
C. Slow driving
Answer: B - On slippery roads you should:
A. Speed up
B. Make sudden turns
C. Slow down carefully
Answer: C - Yield sign means:
A. Stop completely
B. Speed up
C. Give right of way
Answer: C - Tire pressure is important for:
A. Safety and fuel efficiency
B. Music quality
C. Engine color
Answer: A - If an animal appears on the road you should:
A. Accelerate
B. Slow down carefully
C. Close eyes
Answer: B - The horn is used to:
A. Decorate vehicle
B. Warn others
C. Open doors
Answer: B - Before parking you should:
A. Turn radio on
B. Set parking brakes
C. Increase speed
Answer: B
CDL General Knowledge MCQ (61–80)
- A blind intersection is:
A. An intersection with poor visibility
B. A railroad crossing
C. A parking area
Answer: A - If steering feels loose you should:
A. Drive faster
B. Stop and inspect vehicle
C. Ignore it
Answer: B - Logbooks are used to:
A. Record driving hours
B. Wash trucks
C. Measure fuel
Answer: A - Safe following distance in good conditions is:
A. 1 second per 10 feet of vehicle
B. 1 foot only
C. No distance needed
Answer: A - During a tire fire you should:
A. Keep driving
B. Stop safely and use extinguisher
C. Add fuel
Answer: B - Hazard perception means:
A. Ability to identify dangers early
B. Fixing engines
C. Parking quickly
Answer: A - Cargo weight should be balanced for:
A. Better control
B. Faster speed
C. Louder engine
Answer: A - Flashing yellow light means:
A. Stop completely
B. Slow down and proceed carefully
C. Reverse vehicle
Answer: B - Before opening vehicle doors you should:
A. Check for traffic
B. Honk horn
C. Turn engine off
Answer: A - Windshield wipers help to:
A. Improve visibility
B. Increase speed
C. Cool engine
Answer: A - Fatigue is dangerous because it causes:
A. Faster reaction
B. Slower reaction time
C. Better control
Answer: B - If vehicle pulls to one side you should:
A. Ignore it
B. Inspect tires or brakes
C. Accelerate
Answer: B - A safe escape route is:
A. A path to avoid collisions
B. A parking space
C. A fuel station
Answer: A - Coolant is used to:
A. Prevent overheating
B. Clean mirrors
C. Inflate tires
Answer: A - Before crossing an intersection you should:
A. Close eyes
B. Look both ways
C. Speed up
Answer: B - Brake fade is caused by:
A. Excessive heat
B. Cold weather
C. Low fuel
Answer: A - Emergency flashers are used to:
A. Warn traffic of hazards
B. Decorate truck
C. Open doors
Answer: A - If visibility becomes poor you should:
A. Speed up
B. Slow down and increase distance
C. Turn radio louder
Answer: B - Speed limits are designed to:
A. Promote safe driving
B. Waste fuel
C. Slow traffic only
Answer: A - Underinflated tires can cause:
A. Better fuel economy
B. Tire overheating and blowouts
C. Faster braking
Answer: B
CDL General Knowledge MCQ (81–100)
- Before moving a parked vehicle you should:
A. Check surroundings and mirrors
B. Honk continuously
C. Speed away
Answer: A - Axle weight limits help to:
A. Protect roads and ensure safety
B. Increase music volume
C. Improve paint color
Answer: A - If you miss an exit you should:
A. Back up on highway
B. Continue to next exit safely
C. Make sudden U-turn
Answer: B - A no-zone is:
A. Truck blind spot area
B. Fuel station
C. Parking area
Answer: A - Sudden braking may cause:
A. Better handling
B. Skids
C. Tire cooling
Answer: B - When approaching work zones you should:
A. Speed up
B. Slow down and stay alert
C. Ignore signs
Answer: B - Fire extinguishers are used to:
A. Put out small fires
B. Wash engine
C. Inflate tires
Answer: A - Safest way to handle curves is:
A. Brake hard during turn
B. Slow before entering
C. Accelerate sharply
Answer: B - If headlights fail you should:
A. Continue driving fast
B. Pull over safely
C. Close eyes
Answer: B - Reflectors on trucks help to:
A. Increase visibility
B. Reduce fuel use
C. Improve steering
Answer: A - Before mountain driving you should:
A. Check brakes and gears
B. Remove mirrors
C. Turn engine off
Answer: A - Excessive downhill speed may cause:
A. Better control
B. Loss of brake control
C. Lower fuel use
Answer: B - If another driver is aggressive you should:
A. Stay calm and avoid confrontation
B. Race them
C. Block the road
Answer: A - Lane markings are used to:
A. Guide traffic safely
B. Decorate roads
C. Measure speed
Answer: A - When emergency vehicles approach you should:
A. Speed up
B. Pull over and stop
C. Ignore them
Answer: B - Safety inspections help to:
A. Prevent mechanical failures
B. Increase speed
C. Reduce mirrors
Answer: A - Before transporting cargo you should:
A. Inspect and secure load
B. Drive immediately
C. Ignore cargo
Answer: A - Overloaded trailers can cause:
A. Reduced braking ability
B. Better steering
C. Faster stopping
Answer: A - In rainy weather you should:
A. Reduce speed and increase distance
B. Speed up
C. Brake suddenly
Answer: A - Most important rule for CDL drivers is:
A. Drive safely and responsibly
B. Drive fast
C. Ignore traffic rules
Answer: A