Electric Heat ESCO - HVAC Excellence Exam Questions & Answers Already Passed!!

Before working on an electric furnace the tech should - Answer-Review diagram, remove jewelry, and follow safety procedures. ALL OF THE ABOVE. A GFCI circuit breaker - Answer-detects current leaks to groound the conductor in an electric heat element is usually made of - Answer-Nichrome An example of resistive load is - Answer-crankcase heater an example of an inductive load is - Answer-motor an electric furnace is marked 208/230 single phase 60Hz A tech reads 200 vac at the power supply and determines - Answer-the voltage is too low voltage imbalance between any leg of 3 phase power supply may not exceed - Answer-2% the limit switch on an electric furnace is a - Answer-Automatic reset switch the sequencer timers on electric heater will usually energize the 1st heating element after a time delay of - Answer-1 to 30 sec the amount of btus produced by 1 watt of electricity is - Answer-3.413 btus a tech reads 60 amps with a clamp on amp meter on a forced air furnace. the supply voltage is 230 volts AC, approx how many watts is the furnace using - Answer-13,800 a furnace is using 15,500 watts approx Kw - Answer-15.5 Kwa sequencer timer use _____ to close the contact points to the heater element - Answer-heated snap-discs or bi-metal strips an electric furnace heating thermostat must - Answer-open on rise close on drop a standard thermostat heat anticipator is ____ and wired in ____ with the heating control - Answeradjustable/series some thermostat manufacturers require a jumper connection on the thermostat subbase of heating and cooling thermostat in order to - Answer-use a single transformer most electric heat elements use the following safties to prevent overheating - Answer-snap disc and fusible link a tech reads 70 amps to the single phase heater . the supply voltage is 230 volts Ac. Approx how many btus is the furnace producing - Answer-54,949