HVAC EXCELLENCE ELECTRICITY
COMPREHENSIVE EXAM STUDY GUIDE
WITH COMPLETE SOLUTIONS
●● Impedance is:
Answer: Opposition to alternating current flow.
●● Like charges;
Answer: repel each other.
●● Any material that will readily release electrons is called;
Answer: A conductor
●● The symbol for current is;
Answer: I
●● Which of the following materials would be best suited for use as a
semi-conductor?
Answer: silicon
●● The safety ground conductor is usually color coded;
Answer: green or bare.
,●● An electron has;
Answer: a negative charge.
●● Resistance is:
Answer: Opposition to current flow.
●● How many watts of power are used by a heater operating at 240 volts
and drawing 5 amps?
Answer: 1200 watts
●● Which of the following meters must use its internal power to check a
load or circuit?
Answer: Ohmmeter
●● In electrical wiring, a black colored wire in an alternating current
circuit usually indicates;
Answer: the hot conductor.
●● Fuses are sized by:
Answer: Volts & Amps
, ●● What would be the result, if a 24 volt, 20-ohm low voltage conta ctor
coil were wired in series with a 24 volt, 200-ohm control relay coil?
Answer: Only the control relay would operate.
●● Three defrost heaters, each 15 ohms are wired in parallel to a 120
volt power supply. How many watts of power will be used?
Answer: 2880 Watts
●● Which of the following is generally considered to be within the
maximum allowable (plus or minus) supply voltage variation?
Answer: 5%
●● Capacitors are rated in
Answer: Microfarads & Volts.
●● When testing a capacitor with an analog or digital ohmmeter, the
meter should;
Answer: measure low resistance then return to high reading.
●● What is the term used to describe the output side of a transformer?
Answer: Secondary side.
●● One horsepower is equal to __________ watts.
COMPREHENSIVE EXAM STUDY GUIDE
WITH COMPLETE SOLUTIONS
●● Impedance is:
Answer: Opposition to alternating current flow.
●● Like charges;
Answer: repel each other.
●● Any material that will readily release electrons is called;
Answer: A conductor
●● The symbol for current is;
Answer: I
●● Which of the following materials would be best suited for use as a
semi-conductor?
Answer: silicon
●● The safety ground conductor is usually color coded;
Answer: green or bare.
,●● An electron has;
Answer: a negative charge.
●● Resistance is:
Answer: Opposition to current flow.
●● How many watts of power are used by a heater operating at 240 volts
and drawing 5 amps?
Answer: 1200 watts
●● Which of the following meters must use its internal power to check a
load or circuit?
Answer: Ohmmeter
●● In electrical wiring, a black colored wire in an alternating current
circuit usually indicates;
Answer: the hot conductor.
●● Fuses are sized by:
Answer: Volts & Amps
, ●● What would be the result, if a 24 volt, 20-ohm low voltage conta ctor
coil were wired in series with a 24 volt, 200-ohm control relay coil?
Answer: Only the control relay would operate.
●● Three defrost heaters, each 15 ohms are wired in parallel to a 120
volt power supply. How many watts of power will be used?
Answer: 2880 Watts
●● Which of the following is generally considered to be within the
maximum allowable (plus or minus) supply voltage variation?
Answer: 5%
●● Capacitors are rated in
Answer: Microfarads & Volts.
●● When testing a capacitor with an analog or digital ohmmeter, the
meter should;
Answer: measure low resistance then return to high reading.
●● What is the term used to describe the output side of a transformer?
Answer: Secondary side.
●● One horsepower is equal to __________ watts.
