GPT Inspection & Quality Control 2

Question 1

During a visual inspection of a newly installed gas pipe joint, a technician notices a slight discoloration around the fitting. What is the most appropriate first action?

Accepted Answer

Perform a leak test with an approved detection solution

Answer

Any discoloration around a fitting could indicate a leak or heat damage, so a leak test with an approved detection solution is the required first step.

Question 2

Which standard governs the minimum inspection requirements for gas piping installations in most US jurisdictions?

Accepted Answer

NFPA 54 (National Fuel Gas Code)

Answer

NFPA 54, the National Fuel Gas Code, sets minimum inspection and installation requirements for gas piping systems in the US.

Question 3

A pressure test for a medium-pressure gas system (0.5–2 psi) must hold for a minimum of how long to be considered acceptable under NFPA 54?

Accepted Answer

15 minutes

Answer

NFPA 54 requires a minimum 15-minute pressure test hold time to verify the integrity of medium-pressure gas piping.

Question 4

When inspecting a gas pipe for corrosion, which condition would require immediate replacement of the pipe section?

Accepted Answer

Wall thickness reduced below minimum specified by the manufacturer

Answer

When corrosion reduces wall thickness below the manufacturer's minimum specification, structural integrity is compromised and replacement is mandatory.

Question 5

What type of gauge is required when performing a pressure test on gas piping systems to ensure accurate readings?

Accepted Answer

A calibrated gauge with increments not exceeding 10% of the test pressure

Answer

A calibrated gauge with increments not exceeding 10% of the test pressure ensures accuracy and is required for valid pressure testing.

(GPT) Gas Pipe Technician Certification Practice Test

(GPT) Gas Pipe Technician Certification Practice Test

GPT Inspection & Quality Control 2