CDL TANKER ENDORSEMENT EXAM Verified
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already
Graded A+
1. A vehicle is considered a tanker when it:
A. Carries any hazardous material
B. Has a cargo tank with a capacity of 500 gallons or more
C. Is designed to transport liquid or gaseous cargo in bulk
D. Has multiple axles
Answer: C
Tank vehicles are defined by their design to carry bulk liquids or gases, not just
by volume alone.
2. Why are tank vehicles more difficult to control than other commercial
vehicles?
A. They are heavier
B. They are taller
C. Liquids can surge and shift weight
D. They have weaker brakes
Answer: C
Liquid movement inside the tank causes surge, affecting stability and braking.
3. Liquid surge is most noticeable when:
A. Driving uphill
B. Starting, stopping, or turning
C. Driving at constant speed
D. Driving downhill only
Answer: B
Surge occurs when speed or direction changes cause the liquid to move.
,4. Which tank is most likely to produce the greatest surge?
A. Completely full tank
B. Nearly empty tank
C. Partially full tank
D. Divided tank
Answer: C
A partially full tank allows the liquid more room to move.
5. What effect does liquid surge have during braking?
A. Improves braking
B. No effect
C. Increases stopping distance
D. Locks the wheels faster
Answer: C
Surging liquid pushes forward, adding force against braking.
6. When making a turn in a tanker, you should:
A. Accelerate through the turn
B. Brake hard mid-turn
C. Slow down before entering the turn
D. Turn faster than normal
Answer: C
Entering a turn too fast increases rollover risk.
7. What is “outward surge”?
A. Liquid moving forward
B. Liquid moving backward
C. Liquid pushing toward the outside of a turn
D. Liquid evaporating
Answer: C
Outward surge increases rollover potential in curves.
, 8. Compared to dry vans, tank vehicles have:
A. Lower center of gravity
B. Higher rollover risk
C. Shorter stopping distance
D. Better traction
Answer: B
Liquid movement and higher center of gravity increase rollover risk.
9. Smooth bore tanks differ from baffled tanks because they:
A. Prevent surge completely
B. Carry solids
C. Allow more liquid movement
D. Are illegal
Answer: C
Smooth bore tanks have no internal barriers to limit surge.
10. Baffles in a tank are used to:
A. Increase cargo weight
B. Improve fuel efficiency
C. Reduce liquid surge
D. Prevent leaks
Answer: C
Baffles slow the movement of liquid within the tank.
11. Bulkheads differ from baffles because bulkheads:
A. Are smaller
B. Divide the tank into separate compartments
C. Are removable
D. Carry gases only
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already
Graded A+
1. A vehicle is considered a tanker when it:
A. Carries any hazardous material
B. Has a cargo tank with a capacity of 500 gallons or more
C. Is designed to transport liquid or gaseous cargo in bulk
D. Has multiple axles
Answer: C
Tank vehicles are defined by their design to carry bulk liquids or gases, not just
by volume alone.
2. Why are tank vehicles more difficult to control than other commercial
vehicles?
A. They are heavier
B. They are taller
C. Liquids can surge and shift weight
D. They have weaker brakes
Answer: C
Liquid movement inside the tank causes surge, affecting stability and braking.
3. Liquid surge is most noticeable when:
A. Driving uphill
B. Starting, stopping, or turning
C. Driving at constant speed
D. Driving downhill only
Answer: B
Surge occurs when speed or direction changes cause the liquid to move.
,4. Which tank is most likely to produce the greatest surge?
A. Completely full tank
B. Nearly empty tank
C. Partially full tank
D. Divided tank
Answer: C
A partially full tank allows the liquid more room to move.
5. What effect does liquid surge have during braking?
A. Improves braking
B. No effect
C. Increases stopping distance
D. Locks the wheels faster
Answer: C
Surging liquid pushes forward, adding force against braking.
6. When making a turn in a tanker, you should:
A. Accelerate through the turn
B. Brake hard mid-turn
C. Slow down before entering the turn
D. Turn faster than normal
Answer: C
Entering a turn too fast increases rollover risk.
7. What is “outward surge”?
A. Liquid moving forward
B. Liquid moving backward
C. Liquid pushing toward the outside of a turn
D. Liquid evaporating
Answer: C
Outward surge increases rollover potential in curves.
, 8. Compared to dry vans, tank vehicles have:
A. Lower center of gravity
B. Higher rollover risk
C. Shorter stopping distance
D. Better traction
Answer: B
Liquid movement and higher center of gravity increase rollover risk.
9. Smooth bore tanks differ from baffled tanks because they:
A. Prevent surge completely
B. Carry solids
C. Allow more liquid movement
D. Are illegal
Answer: C
Smooth bore tanks have no internal barriers to limit surge.
10. Baffles in a tank are used to:
A. Increase cargo weight
B. Improve fuel efficiency
C. Reduce liquid surge
D. Prevent leaks
Answer: C
Baffles slow the movement of liquid within the tank.
11. Bulkheads differ from baffles because bulkheads:
A. Are smaller
B. Divide the tank into separate compartments
C. Are removable
D. Carry gases only
