HVAC Electrical Test Questions with Detailed Verified Answers

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HVAC Electrical Test Questions with
Detailed Verified Answers

Question:Current flow is


Ans: the flow of electrons in the circuit


Question: impedance is


Ans: opposition to alternating current flow


Question: like charges


Ans: repel each other


Question: Any material that will readily release electrons is called


Ans: a conductor


Question: the symbol for current is


Ans: I


Question: Which of the following materials would best be suited for use as a
semi-conductor

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Ans: silicone


Question: the safety ground conductor is usually color coded


Ans: black (or bare or green & yellow stripe)


Question: An electron has


Ans: a negative charge


Question: resistance is


Ans: opposition to current flow


Question: How many watts of power are used by a heater operating at 460
volts and drawing 5 amps?


Ans: 2300 watts


Question: What type of meter uses its own battery?


Ans: ohmmeter


Question: in electrical wiring a black colored wire usually indicates


Ans: the hot conductor


Question: Fuses are sized by

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Ans: Volts & Amps


Question: Two 120 volt incandescent light bulbs are wired in series, one is a 60
watt bulb, the other is a 4 watt bulb. The result would be;


Ans: Both bulbs light


Question: Three defrost heaters; each 15 ohms are wired in parallel to a 120
volt power supply. How many watts of power will be used?


Ans: 2880 watts


Question: What is generally considered to be the maximum allowable (plus or
minus) supply voltage variation?


Ans: 5%


Question: Capacitors are rated in:


Ans: Microfarads & Volts


Question: When testing a capacitor with an analog ohmmeter, the needle on
the meter should;


Ans: deflect towards zero then return to infinite reading.


Question: What is the term used to describe the output side of a transformer?