CDL
General Knowledge
(Verified 100 MCQ)
Questions with Rationales
This Document Description:
This document contains a collection of 100
verified multiple-choices questions and
Correct answers with Rationales.
Ideal for exam preparation and concept
reinforcement.
,1. Safe drivers must maintain space around their vehicles for which of the
following reasons?
A. In case you must stop suddenly, cars are following too closely, and there is an
obstacle in the road
B. To allow for sudden lane changes without signaling
C. To create space for tailgating slower vehicles
D. To improve fuel economy only
Correct Answer: A
Rationale: Maintaining a safety cushion on all sides provides reaction time for sudden
stops, protects against rear-end collisions from tailgaters, and allows room to maneuver
around unexpected obstacles.
2. Hydroplaning can occur when you drive through water or slush. If you
experience hydroplaning, you should:
A. Brake firmly to slow down
B. Release the accelerator and push in the clutch
C. Steer sharply toward the shoulder
D. Accelerate to regain traction
Correct Answer: B
Rationale: Hydroplaning causes a loss of tire contact with the road. Releasing the
accelerator reduces speed gradually, and pushing in the clutch on a manual
transmission prevents sudden jolts that could worsen the skid.
3. When you are in a 60-foot vehicle, how much space should you maintain in
front of you at highway speeds?
A. Three seconds
B. Five seconds
C. Seven seconds
D. Ten seconds
Correct Answer: C
Rationale: At highway speeds, a 60-foot vehicle requires a minimum following distance
of seven seconds to ensure adequate stopping time. Heavier and longer vehicles need
more space than passenger cars to stop safely.
,4. What is the first thing to do if your vehicle catches fire while driving?
A. Open the hood and attempt to extinguish the fire immediately
B. Pull off the road and park in an open area
C. Call emergency services while continuing to drive
D. Accelerate to blow out the flames
Correct Answer: B
Rationale: The immediate priority is to remove the vehicle from traffic and stop in an
open area away from buildings, people, and other vehicles. This reduces the risk of the
fire spreading and minimizes hazards to others.
5. The best way to put out a fire is to:
A. Stand downwind and spray the top of the flames
B. Stand upwind and spray the base of the fire
C. Throw water on a grease or electrical fire
D. Open all windows to smother the fire
Correct Answer: B
Rationale: Standing upwind keeps you clear of smoke and heat, while aiming at the
base of the fire attacks the fuel source. Spraying the top of the flames is ineffective and
can spread the fire.
6. What are some common causes of vehicle fires?
A. Spilled fuel, short circuits, and driver smoking
B. Overinflated tires, spilled fuel, and wet brakes
C. Short circuits, driver smoking, and loud radio equipment
D. Spilled fuel, broken windshield, and driver smoking
Correct Answer: A
Rationale: The three leading causes of commercial vehicle fires are spilled fuel (contact
with hot engine parts), electrical short circuits, and smoking materials. These ignition
sources are preventable through proper maintenance and cab rules.
, 7. When making a right-hand turn, you should always:
A. Swing wide to the left before turning
B. Keep the rear of your vehicle close to the curb
C. Turn from the left lane to widen the arc
D. Honk your horn continuously through the turn
Correct Answer: B
Rationale: Keeping the rear of the vehicle close to the curb prevents the trailer from
cutting into adjacent lanes or striking curbs, pedestrians, or parked vehicles on the right
side.
8. A front-wheel skid is usually caused by:
A. Driving too fast for conditions, lack of tread on the front tires, and cargo improperly
loaded
B. Driving too slowly, overinflated tires, and light cargo
C. Wet roads exclusively
D. Excessive use of the parking brake
Correct Answer: A
Rationale: Front-wheel skids result from loss of traction due to excessive speed, worn
front tire tread, or improper cargo distribution that unweights the steering axle.
Correcting these factors restores steering control.
9. Driving at night is more dangerous because:
A. Most people are less alert due to fatigue, headlights cause glare, and there are more
drunk drivers
B. Speed limits are reduced
C. Roads are narrower at night
D. Traffic volume is always heavier
Correct Answer: A
Rationale: Night driving increases risk due to driver fatigue, glare from oncoming
headlights that reduces visibility, and a higher incidence of impaired drivers. Extra
caution and reduced speed are essential after dark.
General Knowledge
(Verified 100 MCQ)
Questions with Rationales
This Document Description:
This document contains a collection of 100
verified multiple-choices questions and
Correct answers with Rationales.
Ideal for exam preparation and concept
reinforcement.
,1. Safe drivers must maintain space around their vehicles for which of the
following reasons?
A. In case you must stop suddenly, cars are following too closely, and there is an
obstacle in the road
B. To allow for sudden lane changes without signaling
C. To create space for tailgating slower vehicles
D. To improve fuel economy only
Correct Answer: A
Rationale: Maintaining a safety cushion on all sides provides reaction time for sudden
stops, protects against rear-end collisions from tailgaters, and allows room to maneuver
around unexpected obstacles.
2. Hydroplaning can occur when you drive through water or slush. If you
experience hydroplaning, you should:
A. Brake firmly to slow down
B. Release the accelerator and push in the clutch
C. Steer sharply toward the shoulder
D. Accelerate to regain traction
Correct Answer: B
Rationale: Hydroplaning causes a loss of tire contact with the road. Releasing the
accelerator reduces speed gradually, and pushing in the clutch on a manual
transmission prevents sudden jolts that could worsen the skid.
3. When you are in a 60-foot vehicle, how much space should you maintain in
front of you at highway speeds?
A. Three seconds
B. Five seconds
C. Seven seconds
D. Ten seconds
Correct Answer: C
Rationale: At highway speeds, a 60-foot vehicle requires a minimum following distance
of seven seconds to ensure adequate stopping time. Heavier and longer vehicles need
more space than passenger cars to stop safely.
,4. What is the first thing to do if your vehicle catches fire while driving?
A. Open the hood and attempt to extinguish the fire immediately
B. Pull off the road and park in an open area
C. Call emergency services while continuing to drive
D. Accelerate to blow out the flames
Correct Answer: B
Rationale: The immediate priority is to remove the vehicle from traffic and stop in an
open area away from buildings, people, and other vehicles. This reduces the risk of the
fire spreading and minimizes hazards to others.
5. The best way to put out a fire is to:
A. Stand downwind and spray the top of the flames
B. Stand upwind and spray the base of the fire
C. Throw water on a grease or electrical fire
D. Open all windows to smother the fire
Correct Answer: B
Rationale: Standing upwind keeps you clear of smoke and heat, while aiming at the
base of the fire attacks the fuel source. Spraying the top of the flames is ineffective and
can spread the fire.
6. What are some common causes of vehicle fires?
A. Spilled fuel, short circuits, and driver smoking
B. Overinflated tires, spilled fuel, and wet brakes
C. Short circuits, driver smoking, and loud radio equipment
D. Spilled fuel, broken windshield, and driver smoking
Correct Answer: A
Rationale: The three leading causes of commercial vehicle fires are spilled fuel (contact
with hot engine parts), electrical short circuits, and smoking materials. These ignition
sources are preventable through proper maintenance and cab rules.
, 7. When making a right-hand turn, you should always:
A. Swing wide to the left before turning
B. Keep the rear of your vehicle close to the curb
C. Turn from the left lane to widen the arc
D. Honk your horn continuously through the turn
Correct Answer: B
Rationale: Keeping the rear of the vehicle close to the curb prevents the trailer from
cutting into adjacent lanes or striking curbs, pedestrians, or parked vehicles on the right
side.
8. A front-wheel skid is usually caused by:
A. Driving too fast for conditions, lack of tread on the front tires, and cargo improperly
loaded
B. Driving too slowly, overinflated tires, and light cargo
C. Wet roads exclusively
D. Excessive use of the parking brake
Correct Answer: A
Rationale: Front-wheel skids result from loss of traction due to excessive speed, worn
front tire tread, or improper cargo distribution that unweights the steering axle.
Correcting these factors restores steering control.
9. Driving at night is more dangerous because:
A. Most people are less alert due to fatigue, headlights cause glare, and there are more
drunk drivers
B. Speed limits are reduced
C. Roads are narrower at night
D. Traffic volume is always heavier
Correct Answer: A
Rationale: Night driving increases risk due to driver fatigue, glare from oncoming
headlights that reduces visibility, and a higher incidence of impaired drivers. Extra
caution and reduced speed are essential after dark.
