money money money
tis the season for heating
die hard is not a xmas movie
sometimes its just a filter
5 more weeks for some of you
100
how much combustion air is required to burn and properly vent 1 cubic foot of natural gas?
15 cubic foot
100
the typical manifold pressure for liquified petroleum (LP) gas appliance should be
10-11 inch w.c.
100
what reading should a good thermocoupler produce on a DC meter?
30 millivolts
100
a technician starts a standing pilot furnace and notices when the blower is energized the flames "roll out". the technician correctly suspects
a cracked heat exchanger
100
when venting a category I furance, it is sometimes necessary to increase the vent pipe size. the proper location to adapt to the larger vent is
3 feet above the furnace connection
200
what is this component called
transformer
200
the efficiency rating of a gas burning appliance is determined using the
afue or annual fuel utilization efficeincy
200
liquified petroleum (LP) gases are
propane and butane
200
the proper metjhod for testing flame rectification is
placing the meter in series with the flame sensor to test the DC microamps
200
you are installing 1/2 inch and 3/4 inch black iron pipe to a natural gas furnace. when threading, what is the approximate number of threads to cut?
7-10 threads
300
the purpose of a flue baffle is to
increase heat exchange
300
which conditions would cause the temperature limit safety switch to shut of the burners
fan motor failure
300
when the burners of a furnace are ignited, the blower motor operation is delayed to
allow the heat exchanger to warm up first
300
to react to a change in temperature, the fan/limit switch in a standing pilot furnace uses a helical shaft made of
bi-metal
300
the proper name for the tool used to cut the threads of steel pipe is a
die
400
the ignition temperature of natural gas is
900-10000 degrees
400
the cut off plate is a component of the
blower housing
400
which of the following test instruments ca be used to check the gas pressure of a furnace?
manometer
400
type b vent pipe constructed with an inner pipe and an outer pipe. the inner pipe is made of
aluminum
400
what would likely be the result of an oversized furnace?
the furnace would operate at a low temperature split
500
air that is mixed with natural ga in the burner is called
primary air
500
a "spud" or burner orifice
controls manifold pressure
500
the igniter in a hot surface ignition furnace does not energize after the inducer draft motor is energized. the proper action for the technician would be to?
check for voltage through the pressure switch
500
what type of draft is used to move flue gas through the heat exchanger and into the venting system in a modern gas-fired furnace
mechanical
500
the normal voltage for a hot surface igniter is
120 volts