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Tanker Practice Question 52

NTanker · Question 52

When discharging at a customer site, the proper grounding/bonding sequence is:

• AConnect product hose first
• BConnect bonding/grounding before opening any valve, disconnect last
• CSkip if rainy
• DUse rubber gloves only

Correct answer: B. Connect bonding/grounding before opening any valve, disconnect last

Why: Bond/ground first; open valves second; close valves first; disconnect bond last. This sequence eliminates static buildup as the cause of ignition.

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:
• Q47. A vapor barrier on a tanker keeps:
• 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.