Electric
heat exam questions with correct answers
/ / / / / /
What
/is /the /first /thing /a /technician /should /do /before /working /on /a /funace? /- /verified /answer(s)-
✔✔Make /sure /electric /power /at /the /furnace /is /turned /off
A /GFCI /detects /what? /- /verified /answer(s)-✔✔Current /leaks /to /ground
The /conductor /in /an /electric /heat /element /is /usually /made /of? /- /verified /answer(s)-
✔✔Nichrome
An /example /of /a /resistive /heater /is? /- /verified /answer(s)-✔✔A /crankcase /heater
An /example /of /a /inductive /load /is /a? /- /verified /answer(s)-✔✔Motor
An /electric /furnace /is /marked /208/230- /single /phase-60 /Hz. /200 /VAC /at /the /power /supply /and
/determines? /- /verified /answer(s)-✔✔The /voltage /is /within /allowable /limits
Voltage
/between
/any
/legs
/of /3- /phase /power /supply /may /not /exceed /what /percentage /of /voltage? /- /verified /answer(s)-
✔✔2%
The /limit /switch /on /an /electric /furnace /is /a? /- /verified /answer(s)-✔✔Automatic /reset /switch
,The
/sequencer
/timers
/on
/electric /heaters /will /usually /energize /the /1st /heating /element /after /a /time /delay /of? /- /verified
/answer(s)-✔✔1 /to /30 /seconds
The /amount /of /BTU's /produced /by /one /watt /of /electricity /is? /- /verified /answer(s)-
✔✔3.413 /BTU's
A /technician /reads /60 /amps /with /a /clamp-
on
/ammeter
/on /
a
/forced
/air
/furnace.
/The
/supply
/voltage
/is /230 /volts /AC. /Approximately /how /many /watts /is /the /furnace /using? /- /verified /answer(s)-
✔✔13,800
A
/furnace
/is /using /15,500 /watts /of /power. /What /is /the /approximate /kW /rating? /- /verified /answer(s)-
✔✔15.5kw
Sequence
/timers /use /what /to /close /contact /points /to /the /heater /element? /- /verified /answer(s)-
✔✔heated /snap-discs /or /heated /bi-metal /strips
, An
/electric
/furnace /heating /thermostat /must /must /open /and /close /on /the /rise /of? /- /verified /answer(s)-
✔✔Temperature
A
/standard
/thermostat /heat /anticipatory /is /wired /in /what /and /can /be /what? /- /verified /answer(s)-
✔✔Series /and /adjustable
Some /thermostat /manufacturers /require /a /"jumper" /connection /on /the /thermostat /sub-
base /of /heating /and /cooling /thermostats /in /order /to /use /a? /- /verified /answer(s)-
✔✔Single /transformer
Most
/electric
/heat /elements /use /what /kind /of /safeties /to /prevent /overheating? /- /verified /answer(s)-
✔✔Snap /disc /and /fusible /link
A /technician /reads /70 /amps /to /the /single-
phase
/heater.
/The
/supply
/voltage
/is
/230 /volts /AC. /Approximately /how /many /BTU's /is /the /furnace /producing? /- /verified /answer(s)-
✔✔54,949
The /control /that /prevents /duct /heaters /from /operating /unless /there /is /adequate /supply /air /is?
/- /verified /answer(s)-✔✔Fan /interlock
heat exam questions with correct answers
/ / / / / /
What
/is /the /first /thing /a /technician /should /do /before /working /on /a /funace? /- /verified /answer(s)-
✔✔Make /sure /electric /power /at /the /furnace /is /turned /off
A /GFCI /detects /what? /- /verified /answer(s)-✔✔Current /leaks /to /ground
The /conductor /in /an /electric /heat /element /is /usually /made /of? /- /verified /answer(s)-
✔✔Nichrome
An /example /of /a /resistive /heater /is? /- /verified /answer(s)-✔✔A /crankcase /heater
An /example /of /a /inductive /load /is /a? /- /verified /answer(s)-✔✔Motor
An /electric /furnace /is /marked /208/230- /single /phase-60 /Hz. /200 /VAC /at /the /power /supply /and
/determines? /- /verified /answer(s)-✔✔The /voltage /is /within /allowable /limits
Voltage
/between
/any
/legs
/of /3- /phase /power /supply /may /not /exceed /what /percentage /of /voltage? /- /verified /answer(s)-
✔✔2%
The /limit /switch /on /an /electric /furnace /is /a? /- /verified /answer(s)-✔✔Automatic /reset /switch
,The
/sequencer
/timers
/on
/electric /heaters /will /usually /energize /the /1st /heating /element /after /a /time /delay /of? /- /verified
/answer(s)-✔✔1 /to /30 /seconds
The /amount /of /BTU's /produced /by /one /watt /of /electricity /is? /- /verified /answer(s)-
✔✔3.413 /BTU's
A /technician /reads /60 /amps /with /a /clamp-
on
/ammeter
/on /
a
/forced
/air
/furnace.
/The
/supply
/voltage
/is /230 /volts /AC. /Approximately /how /many /watts /is /the /furnace /using? /- /verified /answer(s)-
✔✔13,800
A
/furnace
/is /using /15,500 /watts /of /power. /What /is /the /approximate /kW /rating? /- /verified /answer(s)-
✔✔15.5kw
Sequence
/timers /use /what /to /close /contact /points /to /the /heater /element? /- /verified /answer(s)-
✔✔heated /snap-discs /or /heated /bi-metal /strips
, An
/electric
/furnace /heating /thermostat /must /must /open /and /close /on /the /rise /of? /- /verified /answer(s)-
✔✔Temperature
A
/standard
/thermostat /heat /anticipatory /is /wired /in /what /and /can /be /what? /- /verified /answer(s)-
✔✔Series /and /adjustable
Some /thermostat /manufacturers /require /a /"jumper" /connection /on /the /thermostat /sub-
base /of /heating /and /cooling /thermostats /in /order /to /use /a? /- /verified /answer(s)-
✔✔Single /transformer
Most
/electric
/heat /elements /use /what /kind /of /safeties /to /prevent /overheating? /- /verified /answer(s)-
✔✔Snap /disc /and /fusible /link
A /technician /reads /70 /amps /to /the /single-
phase
/heater.
/The
/supply
/voltage
/is
/230 /volts /AC. /Approximately /how /many /BTU's /is /the /furnace /producing? /- /verified /answer(s)-
✔✔54,949
The /control /that /prevents /duct /heaters /from /operating /unless /there /is /adequate /supply /air /is?
/- /verified /answer(s)-✔✔Fan /interlock
