HVACR STUDY GUIDE 2026
COMPREHENSIVE QUESTION SET WITH
ANSWERS
◉ 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 best be suited for use as a
semi-conductor.
Answer: silicone
,◉ the safety ground conductor is usually color coded.
Answer: black (or bare or green & yellow stripe)
◉ 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 460
volts and drawing 5 amps?.
Answer: 2300 watts
◉ What type of meter uses its own battery?.
Answer: ohmmeter
◉ in electrical wiring a black colored wire usually indicates.
Answer: the hot conductor
◉ Fuses are sized by.
Answer: Volts & Amps
, ◉ 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;.
Answer: Both bulbs light
◉ 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
◉ What is generally considered to be 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 ohmmeter, the needle on
the meter should;.
Answer: deflect towards zero then return to infinite reading.
◉ What is the term used to describe the output side of a
transformer?.
Answer: Secondary side
COMPREHENSIVE QUESTION SET WITH
ANSWERS
◉ 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 best be suited for use as a
semi-conductor.
Answer: silicone
,◉ the safety ground conductor is usually color coded.
Answer: black (or bare or green & yellow stripe)
◉ 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 460
volts and drawing 5 amps?.
Answer: 2300 watts
◉ What type of meter uses its own battery?.
Answer: ohmmeter
◉ in electrical wiring a black colored wire usually indicates.
Answer: the hot conductor
◉ Fuses are sized by.
Answer: Volts & Amps
, ◉ 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;.
Answer: Both bulbs light
◉ 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
◉ What is generally considered to be 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 ohmmeter, the needle on
the meter should;.
Answer: deflect towards zero then return to infinite reading.
◉ What is the term used to describe the output side of a
transformer?.
Answer: Secondary side
