Steamfitter Quality Control Procedures 3

Question 1

What is the purpose of a traveler or work package in piping fabrication QC?

Accepted Answer

To document each step of fabrication with sign-offs

Answer

A traveler documents each fabrication step—fit-up, welding, NDE, PWHT, testing—with dated signatures to maintain quality traceability.

Question 2

During post-weld heat treatment (PWHT), the thermocouple reading drops below the minimum soak temperature for 5 minutes. What must occur?

Accepted Answer

Restart the soak cycle from the beginning

Answer

If the temperature falls below the specified minimum soak temperature, the soak time must restart from zero to ensure proper stress relief.

Question 3

Which piping code governs quality control requirements for power plant steam piping?

Accepted Answer

ASME B31.1

Answer

ASME B31.1, Power Piping, covers quality requirements for steam and power plant piping systems.

Question 4

A welder's qualification test coupon fails bend testing. What is the immediate consequence?

Accepted Answer

All production welds made by that welder since the last successful test are subject to review

Answer

A failed qualification test calls into question the welder's recent production welds, which must be reviewed and potentially re-examined.

Question 5

What is the acceptable porosity limit for a single circular pore in a groove weld under ASME B31.1?

Accepted Answer

Not to exceed 3/32 inch diameter

Answer

ASME B31.1 limits individual circular porosity to 3/32 inch maximum diameter for groove welds.

(Steamfitter) Steamfitter Pipefitter Exam Practice Test