CFESA Gas Equipment and Safety 2

Question 1

A commercial convection oven's gas valve fails to open when the thermostat calls for heat. After confirming 24V at the valve, the technician should:

Accepted Answer

Replace the gas valve

Answer

Replace the thermostat

Answer

Check the ignition module output

Answer

Inspect the burner orifice

Question 2

What safety certification is required on commercial gas equipment sold in the United States?

Accepted Answer

CSA or ANSI Z83 certification

Answer

UL Listed

Answer

NSF Certified

Answer

AGA Design Certified

Question 3

What does a 100% lockout on a commercial gas burner control system mean?

Accepted Answer

The ignition system has failed to prove flame and shut off gas completely

Answer

The burner is operating at full capacity

Answer

The burner is locked at 100% input

Answer

Gas pressure has exceeded safe levels

Question 4

On a commercial steamer using direct steam injection, which safety device prevents excessive steam pressure buildup?

Accepted Answer

Pressure relief valve

Answer

Pressure regulator

Answer

Steam solenoid valve

Answer

Water level probe

Question 5

What type of gas orifice material is typically used in commercial cooking equipment burners?

Accepted Answer

Brass or stainless steel

Answer

Aluminum

Answer

Copper

Answer

Plastic

Question 6

A commercial fryer's high-limit thermostat has tripped and the unit will not heat. After resetting it, what should the technician verify?

Accepted Answer

Verify oil level, thermostat calibration, and root cause of overheating before returning to service

Answer

Replace the high-limit thermostat immediately

Answer

Clean the burner tubes and return to service

Answer

Replace the gas valve