Exam
2026_2027
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Questions And Answers
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, Before working on an electric furnace the tech should Review diagram, remove jewelry, and follow safety procedures. ALL OF THE
ABOVE.
A GFCI circuit breaker detects current leaks to groound
the conductor in an electric heat element is usually made Nichrome
of
An example of resistive load is crankcase heater
an example of an inductive load is motor
an electric furnace is marked 208/230 single phase 60Hz A the voltage is too low
tech reads 200 vac at the power supply and determines
voltage imbalance between any leg of 3 phase power 2%
supply may not exceed
the limit switch on an electric furnace is a Automatic reset switch
the sequencer timers on electric heater will usually 1 to 30 sec
energize the 1st heating element after a time delay of
the amount of btus produced by 1 watt of electricity is 3.413 btus
a tech reads 60 amps with a clamp on amp meter on a 13,800
forced air furnace. the supply voltage is 230 volts AC,
approx how many watts is the furnace using
a furnace is using 15,500 watts approx Kw 15.5 Kw
a sequencer timer use _____ to close the contact points to heated snap-discs or bi-metal strips
the heater element
an electric furnace heating thermostat must open on rise close on drop
a standard thermostat heat anticipator is ____ and wired in adjustable/series
____ with the heating control