Exam Practice Questions And Correct

Petroleum Technician Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a petroleum storage tank interstitial

monitor?

• To measure product temperature
• To detect leaks between tank walls
• To prevent tank overfilling
• To test tank pressure

Rationale: Interstitial monitoring identifies leaks within double-wall tank

spaces to prevent releases.

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• Which standard governs installation of flammable and combustible

liquid storage systems?

A. OSHA 1910.120

B. API 510

C. NFPA 30

D. UL 2085

Rationale: NFPA 30 regulates safe storage and handling of flammable and

combustible liquids.

• What is the primary hazard of petroleum vapors in confined spaces?
• Frostbite
• Explosion risk
• Noise exposure
• UV radiation

Rationale: Petroleum vapors are flammable and can easily ignite in

confined areas.

• Which device shuts down fuel flow during a dispensing emergency?
• Turbine pump
• Leak detector
• Emergency shear valve 2 / 4

• Stage II vapor recovery system

Rationale: Shear valves close automatically if dispensers are impacted.

• What is the required accuracy of automatic tank gauging (ATG) systems?
• ±0.5 in
• ±1.0 in
• ±0.1 gal

D. ±5%

Rationale: ATG systems must detect small volume changes accurately,

typically ±0.1 gallon.

• Which type of piping is most commonly used for underground fuel

systems?

• Copper
• Aluminum
• Flexible double-wall piping
• Cast iron

Rationale: Flexible double-wall piping provides leak protection and

corrosion resistance.

• What is the primary function of a Stage I vapor recovery system? 3 / 4

• Prevent water intrusion
• Capture vapors during tank filling
• Monitor tank levels
• Prevent piping corrosion

Rationale: Stage I vapor recovery captures vapors displaced during tanker

deliveries.

• A sudden spike in line pressure typically indicates what issue?
• Water contamination
• Low product level
• Blockage or closed valve
• Faulty vent alarm

Rationale: Pressure spikes occur when flow is restricted or blocked.

• What is the safe method to test a spill bucket integrity?
• Add fuel
• Add soap solution
• Use compressed air
• Perform hydrostatic or vacuum testing

Rationale: Regulations require hydrostatic or vacuum testing for certified

spill bucket inspection.

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