CFESA Gas Equipment and Safety

Question 1

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

Accepted Answer

3.5 inches W.C.

Answer

2 inches W.C.

Answer

7 inches W.C.

Answer

11 inches W.C.

Question 2

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

Accepted Answer

11 inches W.C.

Answer

3.5 inches W.C.

Answer

7 inches W.C.

Answer

14 inches W.C.

Question 3

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

Accepted Answer

Insufficient primary air or gas pressure too high

Answer

Excess primary air

Answer

Too much secondary air

Answer

Clogged pilot orifice

Question 4

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

Accepted Answer

Thermocouple or thermopile safety system

Answer

Gas pressure regulator

Answer

Manual reset valve

Answer

Gas solenoid valve

Question 5

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

Accepted Answer

Electronic combustible gas detector or listed leak detection solution

Answer

An open flame

Answer

Compressed air

Answer

Nitrogen pressure test only

Question 6

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

Accepted Answer

Adjust the ratio of air mixed with gas before combustion

Answer

Control gas flow to the burner

Answer

Regulate pilot flame size

Answer

Control secondary air above the burner