Author Question: Which part of an analog flue gas instrument may alter readings because of voltage and current ... (Read 47 times)

yoroshambo · **on:** Jul 26, 2018

Which part of an analog flue gas instrument may alter readings because of voltage and current issues?

A) The selector switch B) The batteries
C) The circuit board D) The pump

Question 2

On a commercial refrigeration system with electric defrost, what does the evaporator fan do during the defrost cycle?

A) It runs backwards to reverse the airflow.
B) It cycles like it normally would.
C) It operates to circulate warm air over the evaporator coils.
D) It shuts off.