CDL Tanker Endorsement Exam Questions & Answers 2026 (1–10)

Q1A driver notices the truck feels like it is being pushed forward when slowing down. What is the most likely cause of this sensation?

• AThe brakes are applying uneven pressure across the axles
• BThe cargo has settled toward the rear during transit
• CThe tank is overfilled and liquid is spilling through the vent
• DFront-to-back liquid surge is shifting weight toward the front of the vehicle

Q2Which tank design uses internal metal walls that completely divide the tank into separate sealed compartments, preventing all liquid movement between sections?

• AUnbaffled tank
• BBaffled tank
• CSmooth-bore tank
• DBulkheaded tank

Q3A smooth-bore tank is MOST commonly used to transport which type of cargo?

• ADry bulk cement
• BFood-grade liquids such as milk or juice
• CGasoline and diesel fuel
• DLiquefied petroleum gas

Q4You are driving a baffled liquid tank that is half full. Compared to a smooth-bore tank at the same fill level, how do the baffles affect surge on curves?

• ABaffles eliminate all side-to-side surge on curves
• BBaffles increase side-to-side surge because they trap liquid against the tank walls
• CBaffles reduce front-to-back surge but do little to control side-to-side surge on curves
• DBaffles only affect surge when the tank is more than three-quarters full

Q5A tank truck is 80% full of a low-viscosity liquid. The driver begins a gradual braking maneuver on a level road. Which outcome best describes what happens to vehicle handling?

• AThe moving liquid creates a forward surge force that supplements braking
• BThe moving liquid creates a forward surge force that adds to stopping distance
• CThe high fill level prevents the liquid from moving, eliminating surge
• DThe vehicle will be unaffected because the tank is nearly full

Q6Which of the following fill levels typically produces the WORST liquid surge in an unbaffled tank?

• A10% full
• BAround 50% full
• C100% full
• D90% full

Q7A driver is turning left at an intersection with a partially loaded smooth-bore tanker. What unique hazard does a smooth-bore tank create compared to a baffled tank in this situation?

• AThe tank is lighter, so the steering is harder to control
• BThe absence of baffles lowers the center of gravity, making turns more stable
• CLiquid shifts fully to one side without restriction, creating severe side-to-side surge and increasing rollover risk
• DSmooth-bore tanks develop higher internal pressure during turns

Q8A tanker driver accelerates quickly from a stop with a tank that is one-third full of liquid. What handling problem is MOST likely to occur?

• AThe brakes automatically engage to compensate for the weight shift
• BThe engine overheats because surge restricts exhaust flow
• CRearward surge shifts weight to the back, reducing front-axle traction and steering control
• DThe rear axle lifts off the road because of forward surge

Q9What is the primary purpose of outage (ullage) space inside a liquid cargo tank?

• ATo provide room for cleaning equipment during washouts
• BTo improve fuel efficiency by keeping the tank lighter
• CTo give the driver a visual reference for measuring fill level
• DTo allow liquid to expand as temperature increases without overpressurizing or overflowing the tank

Q10A driver is hauling a bulkheaded tank with four equal compartments, each filled to 90% capacity with different liquid products. How does the bulkhead design change the surge dynamic compared to a single-chamber tank of the same total volume at the same average fill level?

• ASurge is eliminated entirely because bulkheads block all liquid movement
• BBulkheads convert front-to-back surge into side-to-side surge, worsening cornering stability
• CSurge within each compartment is independent and smaller in magnitude, but multiple compartments can still produce additive handling forces
• DSurge is identical to a single-chamber tank because total liquid mass is the same