GPT Tools & Equipment Operation 3

Question 1

Which instrument is used to verify that a gas valve is fully closed before disconnecting a gas appliance?

Accepted Answer

Combustible gas detector

Answer

A combustible gas detector (sniffer) confirms no gas is present downstream of a closed valve before the technician disconnects the appliance.

Question 2

A diaphragm-type gas pressure gauge reads in inches of water column (in. WC). What is 1 psi approximately equal to?

Accepted Answer

27.7 in. WC

Answer

1 psi equals approximately 27.7 inches of water column, a conversion gas technicians use when working with low-pressure regulators and appliance manifolds.

Question 3

What is the correct way to store oxygen and acetylene cylinders when not in use?

Accepted Answer

Separated by at least 20 feet or a 5-foot non-combustible barrier

Answer

OSHA and CGA require oxygen and fuel-gas cylinders to be stored at least 20 feet apart or separated by a non-combustible, 5-foot-high barrier to prevent fire risk.

Question 4

When a gas technician uses a rotary pipe threader (power drive), what lubricant must be continuously applied?

Accepted Answer

Cutting oil (thread-cutting fluid)

Answer

Thread-cutting oil (cutting fluid) cools the die, lubricates chip removal, and produces well-formed threads without galling on steel pipe.

Question 5

Which hand tool is specifically designed to tighten or remove compression-style gas fittings without damaging the fitting body?

Accepted Answer

Smooth-jaw flare-nut (line) wrench

Answer

A flare-nut wrench encircles the fitting hex on five sides, distributing torque evenly and preventing the rounding-off that pipe wrenches or pliers would cause.

(GPT) Gas Pipe Technician Certification Practice Test

(GPT) Gas Pipe Technician Certification Practice Test

GPT Tools & Equipment Operation 3