HVAC Electrical Test Exam Questions with 100% Correct
Answers for 2025.
Current flow is - Correct answer the flow of electrons in the circuit
Impedance is - Correct answer opposition to alternating current flow
Like charges - Correct answer repel each other
Any material that will readily release electrons is called - Correct answer a
conductor
The symbol for current is - Correct answer I
Which of the following materials would best be suited for use as a semi-conductor -
Correct answer silicone
The safety ground conductor is usually color coded - Correct answer black (or bare
or green & yellow stripe)
An electron has - Correct answer a negative charge
Resistance is - Correct answer opposition to current flow
How many watts of power are used by a heater operating at 460 volts and drawing 5
amps? - Correct answer 2300 watts
What type of meter uses its own battery? - Correct answer ohmmeter
In electrical wiring a black colored wire usually indicates - Correct answer the hot
conductor
Fuses are sized by - Correct answer Volts & Amps
Two 120 volt incandescent light bulbs are wired in series, one is a 60 watt bulb, and
the other is a 4 watt bulb. The result would be; - Correct 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? - Correct answer 2880 watts
What is generally considered to be the maximum allowable (plus or minus) supply
voltage variation? - Correct answer 5%
Capacitors are rated in: - Correct answer Microfarads & Volts
When testing a capacitor with an analog ohmmeter, the needle on the meter should;
- Correct answer deflect towards zero then return to infinite reading.
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, What is the term used to describe the output side of a transformer? - Correct answer
Secondary side
One horsepower is equal to how many watts? - Correct answer 746 Watts
How much resistance must be placed in a 120 volt circuit in order to limit the current
to 2 amps? - Correct answer 60 ohms
A parallel circuit contains an 18 ohm and 9 ohm resistor. The total resistance equals;
- Correct answer 6 ohms
In a series circuit, the voltage drop across each resistance (load) will; - Correct
answer Add up to equal the source voltage
The total resistance of a parallel circuit will be; - Correct answer less than the
smallest resistance
Which of the following statements about current is true? - Correct answer Current
flow will increase when voltage increases.
When resistors are wired in parallel; - Correct answer the voltage drop across each
resistor will be the same as the applied source voltage.
Which of the following is equal to 2.1KW? - Correct answer 2,100 Watts
Which of the following is equal to 100 milliamps? - Correct answer 0.10 amperes
A capacitor analyzer is designed to read; - Correct answer the capacitance of a
capacitor
A 240 volt, 3 wire circuit can be split into two 120 volt circuits. - Correct answer
TRUE
The electric meter on a house measures the _______ passing through it. - Correct
answer wattage
A three phase load requires a minimum of; - Correct answer three supply lines
Which of the following is the correct formula for determining wattage in an electrical
circuit? - Correct answer W = E times I (or V x I)
A parallel circuit consists of three resistors
R1=30 ohms R2=15 ohms R3=10ohms
If the current through R2=4 amperes, what is the source voltage? - Correct answer
60 volts
The 300 ohm resistors are wired in parallel. The total resistance equals; - Correct
answer 100 ohms
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Answers for 2025.
Current flow is - Correct answer the flow of electrons in the circuit
Impedance is - Correct answer opposition to alternating current flow
Like charges - Correct answer repel each other
Any material that will readily release electrons is called - Correct answer a
conductor
The symbol for current is - Correct answer I
Which of the following materials would best be suited for use as a semi-conductor -
Correct answer silicone
The safety ground conductor is usually color coded - Correct answer black (or bare
or green & yellow stripe)
An electron has - Correct answer a negative charge
Resistance is - Correct answer opposition to current flow
How many watts of power are used by a heater operating at 460 volts and drawing 5
amps? - Correct answer 2300 watts
What type of meter uses its own battery? - Correct answer ohmmeter
In electrical wiring a black colored wire usually indicates - Correct answer the hot
conductor
Fuses are sized by - Correct answer Volts & Amps
Two 120 volt incandescent light bulbs are wired in series, one is a 60 watt bulb, and
the other is a 4 watt bulb. The result would be; - Correct 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? - Correct answer 2880 watts
What is generally considered to be the maximum allowable (plus or minus) supply
voltage variation? - Correct answer 5%
Capacitors are rated in: - Correct answer Microfarads & Volts
When testing a capacitor with an analog ohmmeter, the needle on the meter should;
- Correct answer deflect towards zero then return to infinite reading.
Page 1 of 6
, What is the term used to describe the output side of a transformer? - Correct answer
Secondary side
One horsepower is equal to how many watts? - Correct answer 746 Watts
How much resistance must be placed in a 120 volt circuit in order to limit the current
to 2 amps? - Correct answer 60 ohms
A parallel circuit contains an 18 ohm and 9 ohm resistor. The total resistance equals;
- Correct answer 6 ohms
In a series circuit, the voltage drop across each resistance (load) will; - Correct
answer Add up to equal the source voltage
The total resistance of a parallel circuit will be; - Correct answer less than the
smallest resistance
Which of the following statements about current is true? - Correct answer Current
flow will increase when voltage increases.
When resistors are wired in parallel; - Correct answer the voltage drop across each
resistor will be the same as the applied source voltage.
Which of the following is equal to 2.1KW? - Correct answer 2,100 Watts
Which of the following is equal to 100 milliamps? - Correct answer 0.10 amperes
A capacitor analyzer is designed to read; - Correct answer the capacitance of a
capacitor
A 240 volt, 3 wire circuit can be split into two 120 volt circuits. - Correct answer
TRUE
The electric meter on a house measures the _______ passing through it. - Correct
answer wattage
A three phase load requires a minimum of; - Correct answer three supply lines
Which of the following is the correct formula for determining wattage in an electrical
circuit? - Correct answer W = E times I (or V x I)
A parallel circuit consists of three resistors
R1=30 ohms R2=15 ohms R3=10ohms
If the current through R2=4 amperes, what is the source voltage? - Correct answer
60 volts
The 300 ohm resistors are wired in parallel. The total resistance equals; - Correct
answer 100 ohms
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