G3 Tools and Testing Instruments 2

Question 1

What instrument measures gas pressure at an appliance gas valve?

Accepted Answer

Manometer or digital pressure gauge

Answer

A manometer measures gas pressure in inches of water column.

Question 2

What does a combustion analyzer measure?

Accepted Answer

Flue gas components including CO, CO2, O2, and temperature

Answer

It measures flue gas components to evaluate combustion efficiency and safety.

Question 3

What is a combustible gas detector used for?

Accepted Answer

Detecting the presence and location of gas leaks

Answer

It senses combustible gases in air to help locate leaks.

Question 4

When should a CO detector be used during service work?

Accepted Answer

Every time a gas appliance is serviced as standard practice

Answer

A personal CO detector should be used during every gas service call.

Question 5

What is a pipe wrench used for in gas installation?

Accepted Answer

Gripping and turning threaded pipe and fittings

Answer

Serrated jaws grip round pipe for tightening and loosening threaded connections.

G3 - Gas Technician Level 3 Certification Practice Test