Author Question: How is a smoke candle used when troubleshooting an open display case? A) It helps technicians ... (Read 143 times)

burchfield96 · **on:** Jul 24, 2018

How is a smoke candle used when troubleshooting an open display case?

A) It helps technicians trace the flow of refrigerant through the case.
B) Smoke candles are used to calibrate the case modulation damper.
C) It shows the air curtain pattern.
D) It helps locate refrigerant leaks.

Question 2

What is the purpose of the gas burner venturi?

A) The venturi ensures that only gas enters inside the burner while air is directed into the combustion area.
B) The venturi ensures that the proper amount of gas flows into the burner.
C) The venturi mixes the gas and primary air by making them swirl as they pass through.
D) The venturi makes the flames swirl inside the combustion chamber to increase contact with the heat exchanger and boost efficiency.