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HVAC Excellence - ELECTRICITY Exam Practice Questions and Answers

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HVAC Excellence - ELECTRICITY Exam Practice Questions and Answers Current flow is: - ANSWER-The flow of electrons in the circuit. Impedance is: - ANSWER-Opposition to alternating current flow. Like charges; - ANSWER-repel each other. Any material that will readily release electrons is called; ...

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  • November 4, 2024
  • 10
  • 2024/2025
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KaylinHoffman
Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




HVAC Excellence - ELECTRICITY Exam

Practice Questions and Answers


Current flow is: - ANSWER✔✔-The flow of electrons in the circuit.


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




Copyright ©Stuvia International BV 2010-2024 Page 1/10

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024


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. - ANSWER✔✔-746


How much resistance must be placed in a 120 volt circuit in order to limit the current to 2 amps? -

ANSWER✔✔-60 Ohms


A parallel circuit contains a 18 ohm and a 9 ohm resistor. The total resistance equals; - ANSWER✔✔-6

ohms.


In a series circuit, the voltage drop across each resistance (load) will. - ANSWER✔✔-add up to equal the

source voltage.

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