ESCO HVAC Electric Heating Certification Exam.pdf file:///C:/Users/HP/Desktop/New%20fl/ESCO%20HVAC%20Electr
ESCO HVAC Electric Heating Certification Exam
Questions & Answers
1. Before working on an electric furnace, the technician should?
Answer Removejewelry and watches
Review wiring diagram
Safety goggles or glasses all safety procedures
2. A GFCI circuit breaker
Answer detects current leaks to ground
3. The conductor in an electric heat element is usually made of;
Answer nichrome
4. An a example of a a resistive load is a
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,ESCO HVAC Electric Heating Certification Exam.pdf file:///C:/Users/HP/Desktop/New%20fl/ESCO%20HVAC%20Electr
Answer crankcase heater
5. An example of a inductive load is a
Answer motor
6. An electric furnace is marked 208/230- single phase 60 hz. a technican reads200 vac at
the power supply and determines.
Answer the voltage is too low
7. Voltage imbalance between any legs of a 3-phase power supply may notexceed
Answer 2%
8. The limit switch on an electric furnace should be
Answer automatic reset switch
9. The sequencer timers on electric heaters will usually energize the 1st heat-ing element
after a time delay of;
Answer 1-30 seconds
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,ESCO HVAC Electric Heating Certification Exam.pdf file:///C:/Users/HP/Desktop/New%20fl/ESCO%20HVAC%20Electr
10. The amount of BTUs produced by one watt of electricity is
Answer 3.413 BTUs
11. A technican 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 thefurnance using?
Answer 13,800
12. A furnace is using 15,500 watts of power.What is the approximate kWrating?
Answer 15.5 kw
13. Sequence timers use to cose the contact points to the heater
element.
Answer heated snap-discs or heated bi-metal strip
14. An electric furnace heating thermostat must;
Answer open on a rise/close on a drop
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