Tank Construction Contractor Exam Prep | 100 Practice Q&A

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51 Tank Construction Contractor
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Plus Rationales 2026 Q&A | Instant D
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1. What is the primary purpose of a tank foundation?
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A. To speed up installation
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B. To improve tank aesthetics
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C. To reduce evaporation losses
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D. To provide structural support and load distribution
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Rationale: A proper foundation distributes loads evenly and prevents settleme
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nt or tank failure.
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2. Which type of tank is commonly used for petroleum storage?
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A. Glass-lined tanks v


B. Welded steel tanks v v


C. Plastic tanks v


D. Fiber-reinforced tanks v


Rationale: Welded steel tanks are industry-standard for large-
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capacity petroleum storage.
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3. Which code governs welded steel tanks for oil storage?
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A. ASME B31.1 v


B. API 650 v


C. NFPA 70 v


D. AWWA C651 v

,Rationale: API 650 covers welded steel tanks for petroleum and chemical stora
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ge.

4. What does API 653 regulate?
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A. Tank fabrication
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B. Tank inspection and repair
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C. Tank painting
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D. Tank insulation
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Rationale: API 653 focuses on maintaining and repairing existing tanks.
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5. A hydrostatic test on a tank measures:
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A. Corrosion resistance v


B. Structural integrity under water loadv v v v


C. Internal coating quality
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D. Roof seal condition
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Rationale: Hydrostatic testing evaluates tank strength by filling it with water.
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6. Which welding method is most commonly used in tank construction?
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A. Soldering
B. Shielded metal arc welding (SMAW)
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C. Brazing
D. TIG aluminum welding
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Rationale: SMAW is widely used for structural steel welding including tank se
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ams.

7. Which document is required before storing hazardous materials in a t
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ank?

A. Tank color chart
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B. OSHA respirator schedule
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C. Material Safety Data Sheet (MSDS/SDS)
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D. Company training log v v


Rationale: SDS sheets provide hazards, handling, and storage requirements.
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, 8. What is the main function of an external floating roof?
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A. Increase water pressure v v


B. Act as a weather shield
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C. Minimize evaporation losses v v


D. Provide insulation v


Rationale: Floating roofs reduce vapor emissions by resting directly on the liq
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uid surface.
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9. Which component prevents tank over-pressurization?
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A. Roof legs v


B. Anchors
C. Pressure-relief valve v


D. Skirt support
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Rationale: Pressure-relief valves safely release excess pressure.
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10. What is the typical material for potable water storage tanks?
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A. Copper
B. Lead-lined steel v


C. AWWA-approved steel or concrete v v v


D. PVC sheetingv


Rationale: Potable water tanks follow AWWA standards and safe materials.
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11. Cathodic protection on tanks prevents: v v v v




A. Cracking
B. Weld misalignment
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C. Corrosion
D. Roof collapse
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Rationale: CP uses electrical currents to stop corrosion of steel.
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12. The term "shell course" refers to:
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A. The floor plate
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B. The roof assembly
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