Gas Equipment and Safety Flashcards

What is the minimum required gas pressure for most commercial natural gas cooking equipment at the manifold?

Answer: 3.5 inches W.C.

Most commercial natural gas equipment requires a manifold pressure of 3.5 inches W.C. (water column) for proper burner operation.

What is the correct manifold pressure for commercial LP (propane) gas equipment?

Answer: 11 inches W.C.

LP gas commercial equipment typically operates at 11 inches W.C. manifold pressure, which is higher than natural gas due to propane's different combustion properties.

A commercial range burner produces a yellow, lazy flame. The most likely cause is:

Answer: Insufficient primary air or gas pressure too high

A yellow, lazy flame indicates incomplete combustion caused by insufficient primary air or an excessively rich air-gas mixture.

What device automatically shuts off the gas supply if the pilot flame is extinguished on commercial gas equipment?

Answer: Thermocouple or thermopile safety system

A thermocouple or thermopile generates a small electrical current when heated by the pilot flame, which holds open the safety gas valve.

When checking for gas leaks on commercial equipment, technicians should use:

Answer: Electronic combustible gas detector or listed leak detection solution

An electronic combustible gas detector or listed leak detection solution (never an open flame) is safe and effective for locating gas leaks.

What is the purpose of an atmospheric burner's primary air shutter on commercial gas cooking equipment?

Answer: Adjust the ratio of air mixed with gas before combustion

The primary air shutter adjusts the amount of air mixed with gas at the venturi before the burner, controlling the air-gas mixture for proper combustion.