Exam Questions And Correct Answers

Ohio CDL Tanker Endorsement Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• What does a tanker endorsement allow a driver to do?
• Drive a vehicle with passengers
• Drive a commercial vehicle that hauls liquid or gaseous materials

in tanks

• Drive a vehicle carrying explosives
• Drive only dry bulk cargo

A tanker endorsement is required for any commercial motor vehicle designed to transport liquid or gaseous materials in bulk containers.

• What is “liquid surge”?
• The shifting of solid cargo
• The movement of liquid back and forth inside the tank during

stops and starts

• The effect of tire pressure on the vehicle 1 / 3

• The expansion of liquid due to heat

Liquid surge occurs when liquid moves in response to acceleration or braking, affecting vehicle stability and control.

• When should you inspect your tanker vehicle?
• Only before starting your trip
• Only after each delivery
• Only at the end of the day
• Before, during, and after each trip

Continuous inspection helps identify leaks, loose fittings, or other safety hazards early.

4. Baffles in a tank are used to:

• Increase fuel efficiency
• Control the movement of liquid surge
• Reduce pressure in the tank
• Improve aerodynamics

Baffles slow the movement of liquid inside the tank to prevent surges during driving.

5. Unbaffled tanks are also called:

• Dry tanks
• Smooth bore tanks
• Vacuum tanks
• Segmented tanks 2 / 3

Smooth bore tanks have no internal baffles, allowing liquids to move freely and creating strong surges.

• Why are smooth bore tanks more dangerous to drive?
• They hold less liquid
• They have a higher center of gravity
• Liquid movement is not controlled, causing strong surges
• They are heavier

Without baffles, the liquid moves freely, which can push the vehicle forward or backward during stops and starts.

• When should you check for leaks in your tanker?
• Before loading, after loading, and before driving
• Only before loading
• Only after unloading
• Only at fuel stations

Checking for leaks ensures safety and compliance before transporting hazardous or non-hazardous liquids.

• What should you do if you discover a leak in a tanker?
• Continue to destination
• Do not drive the vehicle
• Patch it temporarily
• Report it after delivery

Driving a leaking tanker is illegal and unsafe. You must fix the leak before continuing.

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