GPT Tools & Equipment Operation 4

Question 1

What is the purpose of a manometer during gas appliance commissioning?

Accepted Answer

Measuring gas supply and manifold pressures precisely

Answer

A manometer measures actual gas pressure in inches WC or psi so the technician can confirm the appliance receives the correct supply and manifold pressure.

Question 2

When a technician uses a flaring tool on copper tubing for a gas connection, what must be done BEFORE flaring?

Accepted Answer

Slide the fitting nut onto the tubing

Answer

The fitting nut cannot be installed after the flare is formed, so it must be slipped onto the tube before using the flaring tool.

Question 3

Which detection method is preferred for locating underground gas pipe before excavation?

Accepted Answer

Electronic line locator (pipe/cable locator)

Answer

An electronic pipe/cable locator uses electromagnetic signals to trace the path and depth of buried metallic gas lines before digging begins.

Question 4

A pressure test gauge shows an initial reading of 10 psig on a new gas piping system. After 15 minutes, the gauge reads 9.5 psig. What does this indicate?

Accepted Answer

A leak exists somewhere in the system

Answer

Any pressure drop during a timed pressure test (beyond minor, documented thermal effects) indicates a leak that must be located and repaired before the system is approved.

Question 5

What is the correct technique for applying PTFE (Teflon) tape to a male NPT gas pipe thread?

Accepted Answer

Wrap clockwise, leaving the first thread exposed

Answer

PTFE tape is wrapped in the direction threads engage (clockwise on male end), starting at the first thread back to prevent tape from entering the gas stream and covering the last few threads.

(GPT) Gas Pipe Technician Certification Practice Test

(GPT) Gas Pipe Technician Certification Practice Test

GPT Tools & Equipment Operation 4