G2 Gas Technician Module 19 Revised
Exam Questions and answers with
100% Complete Solutions | verified
&updated 2024
Once a fan motor has been cleaned what are the next two steps? -
✔✔Check electrical wire for tighteness and clean the blower components
How is temperature rise determined? - ✔✔Placing thermometer in the return
and supply plenums while the furnace is running
What tool should be used to clean the outside of the heat exchanger? -
✔✔Soft Brush
How many heat exchangers do Natural Draft Furnace have? - ✔✔One
How is Delta Temperature measured? and what should it match? - ✔✔Supply Air
minus Return Air, It must not be less or more than Manufacturers Rating Plate
,In a high efficiency furnace, which heat exchanger does the Supply air pass
through first? - ✔✔The Secondary
What proves that your Induce blower is functional? - ✔✔The pressure switch
How is Hot Surface Igniter diagnosed? - ✔✔Connect leads to both wires, check
for voltage and Resistance
How is a belt motor in a furnace maintained? - ✔✔Must be Oiled and Alignment
Where is the Automatic Damper located? - ✔✔Down stream of the draft hood
What purpose does a Automatic damper serve? How does it work? - ✔✔Reduce
heat loss up the chimney and it opens when burners fire and closes during the
off cycle
, What is Static Pressure in a furnace?, how is it measured?, and what standard
must it meet? - ✔✔The pressure in the furnace at 90 degrees. It's measured
with a manometer It must meet Manufacturers Rating plate standard
What are the possible causes of abnormal Static Pressure results? - ✔✔Dirty
Air Filters andBlocked AC Evaporator Coil
A Tee is required to be installed off the PVC 636 pipe, what is the component that
should be attached? - ✔✔A Neutralizer with a hose leading to the drain trap
In the event no sewer drain is present how is condensation water mitigated? -
✔✔A Condensation Pump
Where must a furnace air filter be located and which direction? - ✔✔Arrow
must face the negative pressure side of the Fan
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