CFESA Gas Equipment and Safety 4

Question 1

A commercial fryer is producing a lazy, yellow-orange flame. What is the most likely cause?

Accepted Answer

Insufficient air supply to the burner

Answer

A yellow or orange lazy flame indicates incomplete combustion due to insufficient primary air reaching the burner.

Question 2

When performing a gas leak test on a newly installed commercial range, which substance is approved for use on gas connections?

Accepted Answer

Listed leak detection solution or electronic detector

Answer

NFPA 54 and manufacturer guidelines permit the use of listed leak detection solution or an approved electronic detector to check connections.

Question 3

What is the function of a redundant safety valve (RSV) on a commercial gas appliance?

Accepted Answer

It provides two independent gas shutoff seats in series for added safety

Answer

A redundant safety valve contains two independent operator seats in series so that if one fails, the second prevents gas flow.

Question 4

A technician measures manifold pressure on a natural gas appliance and reads 4.5 inches W.C. The rated manifold pressure is 3.5 inches W.C. What should the technician do?

Accepted Answer

Adjust the supply regulator to lower pressure to 3.5 inches W.C.

Answer

Manifold pressure above the rated value must be corrected by adjusting the appliance or supply regulator to the manufacturer's specification.

Question 5

Which condition would cause a pilot flame to fail to heat the thermocouple sufficiently?

Accepted Answer

Pilot orifice is partially blocked reducing flame size

Answer

A blocked pilot orifice reduces the pilot flame so it does not fully engulf the thermocouple tip, resulting in insufficient millivolt output.

CFESA - Commercial Food Equipment Service Association Practice Test

CFESA - Commercial Food Equipment Service Association Practice Test

CFESA Gas Equipment and Safety 4