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Tanker Practice Question 40

NTanker · Question 40

A tank with a recent product change should:

• ABe filled immediately
• BBe cleaned to prevent contamination of the new product
• CBe sold
• DBe parked

Correct answer: B. Be cleaned to prevent contamination of the new product

Why: Cross-contamination between products can damage cargo or create hazardous mixtures. Cleaning and inspection between loads is required by most carriers.

How this question fits the Tanker test

Liquid surge can push a vehicle through an intersection or roll it on a curve. The Tanker endorsement specifically addresses how unbaffled and partially full tanks behave differently from rigid loads.

Study technique for this topic

Know the difference between baffled, unbaffled, and compartmented tanks, the safe outage percentage for liquid expansion, and why front-to-back surge is more dangerous than side-to-side surge.

Related Tanker practice questions

• Q8. When loading flammable liquids, you must:
• Q21. The 'two-thirds rule' for loading flammable liquids is:
• Q34. Liquid level inside a tank can be:
• Q48. The 'volume expansion' of a typical liquid hydrocarbon per 10°F warmth is approximately:
• Q61. Carbon monoxide buildup in compartments is a concern when:

Continue your CDL preparation

The Tanker portion of the CDL knowledge exam covers more than this single question. Use this site's full Tanker bank to drill every topic, then test yourself with one of our state-specific practice sets to confirm you are ready for the actual DMV exam in your state. Always check your state's CDL handbook for any local addenda before the test day.

If you are still building your overall CDL foundation, start with the General Knowledge bank — every CDL applicant must pass it — and then work outward to the endorsements you plan to add.