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Tanker Practice Question 25

NTanker · Question 25

The most common cause of tanker rollovers is:

• ATire failure
• BExcessive speed in curves and ramps
• CBrake failure
• DEngine failure

Correct answer: B. Excessive speed in curves and ramps

Why: FMCSA crash data: speed in curves and ramps is the leading cause of tanker rollovers. The high CoG amplifies any miscalculation.

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

• Q40. A tank with a recent product change should:
• Q53. The most dangerous moment in a tanker rollover sequence is when:
• Q3. A 'baffle' inside a tank is:
• Q16. Liquid surge can:
• Q30. The first rule when starting a downhill grade with liquid is:

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.