GPT System Inspection & Maintenance 2

Question 1

When inspecting a gas piping system for corrosion, which condition requires immediate remediation before the system is returned to service?

Accepted Answer

Pitting corrosion that has reduced wall thickness by more than 30%

Answer

Surface rust on an above-ground steel pipe

Answer

Minor discoloration on a coated pipe exterior

Answer

Light oxidation on a brass valve body

Question 2

A gas technician notices a pressure gauge reading that fluctuates erratically during a static pressure test. What is the most likely cause?

Accepted Answer

There is an active leak somewhere in the system

Answer

The regulator is functioning normally

Answer

The gauge is calibrated too high

Answer

Ambient temperature is affecting the reading

Question 3

Which document must a technician review before performing maintenance on a gas system in a commercial building?

Accepted Answer

The as-built piping drawings and any prior inspection reports

Answer

The building's fire alarm test records

Answer

The local fire department contact list

Answer

The tenant occupancy schedule

Question 4

How often must pressure relief valves on gas appliances be manually tested according to standard maintenance practices?

Accepted Answer

Annually

Answer

Every 5 years

Answer

Every 10 years

Answer

Only when a complaint is filed

Question 5

When using an electronic combustible gas detector during a leak survey, what action must be taken if the detector alarms?

Accepted Answer

Mark the location and immediately notify the gas utility or supervisor

Answer

Record the reading and continue the survey

Answer

Reset the detector and retest once

Answer

Ventilate the area and resume normal operations

Question 6

What is the purpose of painting or labeling exposed gas piping with a specific color or marker?

Accepted Answer

To identify the pipe as a gas line and prevent accidental damage

Answer

To indicate pipe material grade

Answer

To satisfy aesthetic building code requirements

Answer

To show the direction of gas flow

Question 7

During a routine inspection, a technician finds a gas valve that is partially open and supposed to be fully closed. What should be done first?

Accepted Answer

Close the valve and investigate why it was open

Answer

Leave it as found and note it in the report

Answer

Open it fully to equalize pressure

Answer

Replace the valve immediately