HVAC ELECTRICAL TEST 2026-2027 PRACTICE
QUESTIONS AND ANSWERS GRADED A+
Current flow is
the flow of electrons in the circuit
impedance is
opposition to alternating current flow
like charges
repel each other
Any material that will readily release electrons is called
a conductor
the symbol for current is
I
Which of the following materials would best be suited for use as a semi-conductor
,silicone
the safety ground conductor is usually color coded
black (or bare or green & yellow stripe)
An electron has
a negative charge
resistance is
opposition to current flow
How many watts of power are used by a heater operating at 460 volts and drawing
5 amps?
2300 watts
What type of meter uses its own battery?
ohmmeter
in electrical wiring a black colored wire usually indicates
the hot conductor
, Fuses are sized by
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;
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?
2880 watts
What is generally considered to be the maximum allowable (plus or minus) supply
voltage variation?
5%
Capacitors are rated in:
Microfarads & Volts
When testing a capacitor with an analog ohmmeter, the needle on the meter should;
QUESTIONS AND ANSWERS GRADED A+
Current flow is
the flow of electrons in the circuit
impedance is
opposition to alternating current flow
like charges
repel each other
Any material that will readily release electrons is called
a conductor
the symbol for current is
I
Which of the following materials would best be suited for use as a semi-conductor
,silicone
the safety ground conductor is usually color coded
black (or bare or green & yellow stripe)
An electron has
a negative charge
resistance is
opposition to current flow
How many watts of power are used by a heater operating at 460 volts and drawing
5 amps?
2300 watts
What type of meter uses its own battery?
ohmmeter
in electrical wiring a black colored wire usually indicates
the hot conductor
, Fuses are sized by
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;
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?
2880 watts
What is generally considered to be the maximum allowable (plus or minus) supply
voltage variation?
5%
Capacitors are rated in:
Microfarads & Volts
When testing a capacitor with an analog ohmmeter, the needle on the meter should;
