HVAC Electrical EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. Current flow is - ANSWER ✔ the flow of electrons in the circuit
2. impedance is - ANSWER ✔ opposition to alternating current flow
3. like charges - ANSWER ✔ repel each other
4. Any material that will readily release electrons is called - ANSWER ✔ a
conductor
5. the symbol for current is - ANSWER ✔ I
6. Which of the following materials would best be suited for use as a semi-
conductor - ANSWER ✔ silicone
7. the safety ground conductor is usually color coded - ANSWER ✔ black (or
bare or green & yellow stripe)
,8. An electron has - ANSWER ✔ a negative charge
9. The __________ drawing illustrates where the components are located in
small appliances. - ANSWER ✔ pictoral
10.Which of the following motors is most energy efficient? - ANSWER ✔
ECM
11.In a single phase motor, which winding has the most resistance? - ANSWER
✔ start
12.when testing a motor with an ohmmeter, the run winding shows 1,000 ohms
to the motor frame. This indicates; - ANSWER ✔ a grounded condition
13.with a motor running at full load, voltmeter leads are placed on L! and T1
terminals of the contactor. The voltmeter indicates no measurable voltage.
This is an indication of; - ANSWER ✔ good clean contacts
14.When the temperature of a negative temperature coefficient (NTC)
thermistor increases, its resistance will; - ANSWER ✔ decrease
15.When the temperature of a positive temperature coefficient (PTC) thermistor
increases, its resistance will; - ANSWER ✔ increase
16.A transducer can create a signal based on; - ANSWER ✔ pressure
,17.Alternating current (AC) - ANSWER ✔ current that reverses its direction of
flow periodically. Reversals generally occur at regular intervals.
18.Ampere - ANSWER ✔ The amount of current required to flow through a
resistance of one ohm with a pressure of one volt, measured with an
ammeter.
19.The purpose of the heat anticipator is to_____? - ANSWER ✔ reduce the
temperature swing of a conditioned space
20.The difference between system overshoot and system lag is called___. -
ANSWER ✔ temperature swing
21.What is meant by the term detent? - ANSWER ✔ rapid making and breaking
of a contact
22.The heat anticipator in the thermostat control circuit in the heating mode is
active when the ____. - ANSWER ✔ heating contact is closed
23.The heater/ resistor in the thermostat control circuit in the cooling mode is
active when the _____. - ANSWER ✔ cooling contact is open
24.To properly set the heat anticipator the _____ must determine what the
current flow is through the heating circuit when the furnace is operating in a
steady state condition. - ANSWER ✔ heating technician
25.The cold anticipator is wired in ____ with the mercury bulb cooling contacts
and is energized during the off cycle. - ANSWER ✔ parallel
, 26.Line voltage thermostats have heavier contacts and use which type of
sensing element bimetal, bellows, remote bulb, and all of the above. -
ANSWER ✔ all of the above
27.To obtain an accurate reading of a fluid in a large pipe a technician
should____. - ANSWER ✔ use a permanently mounted thermometer in a
well
28.A low pressure control has a "high event" and a "differential" setting the
technician wants the system to turn on at 28 psig and shutdown at 2 psig.
What would be the proper setting. - ANSWER ✔ High event 28 psig and
Differential 26 psig
29.If the suction pressure of a system is 60 psig and the oil pump outlet is 85
psig. What is the net oil pressure. - ANSWER ✔ 25 psig
30.Oil pressure safety controls measures the difference is pressure to establish
____. - ANSWER ✔ that positive oil pressure is present
31.To prove that the combustion blower motor is operating before ignition a
_____ would be used. - ANSWER ✔ pressure differential switch
32.To control ice build up on a heat pump outdoor coil in the heating cycle a
___ is attached to a large diaphram. - ANSWER ✔ micro-switch
33.Where would a water regulating valve that is controlling head pressure be
installed. - ANSWER ✔ water circuit at inlet condenser
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. Current flow is - ANSWER ✔ the flow of electrons in the circuit
2. impedance is - ANSWER ✔ opposition to alternating current flow
3. like charges - ANSWER ✔ repel each other
4. Any material that will readily release electrons is called - ANSWER ✔ a
conductor
5. the symbol for current is - ANSWER ✔ I
6. Which of the following materials would best be suited for use as a semi-
conductor - ANSWER ✔ silicone
7. the safety ground conductor is usually color coded - ANSWER ✔ black (or
bare or green & yellow stripe)
,8. An electron has - ANSWER ✔ a negative charge
9. The __________ drawing illustrates where the components are located in
small appliances. - ANSWER ✔ pictoral
10.Which of the following motors is most energy efficient? - ANSWER ✔
ECM
11.In a single phase motor, which winding has the most resistance? - ANSWER
✔ start
12.when testing a motor with an ohmmeter, the run winding shows 1,000 ohms
to the motor frame. This indicates; - ANSWER ✔ a grounded condition
13.with a motor running at full load, voltmeter leads are placed on L! and T1
terminals of the contactor. The voltmeter indicates no measurable voltage.
This is an indication of; - ANSWER ✔ good clean contacts
14.When the temperature of a negative temperature coefficient (NTC)
thermistor increases, its resistance will; - ANSWER ✔ decrease
15.When the temperature of a positive temperature coefficient (PTC) thermistor
increases, its resistance will; - ANSWER ✔ increase
16.A transducer can create a signal based on; - ANSWER ✔ pressure
,17.Alternating current (AC) - ANSWER ✔ current that reverses its direction of
flow periodically. Reversals generally occur at regular intervals.
18.Ampere - ANSWER ✔ The amount of current required to flow through a
resistance of one ohm with a pressure of one volt, measured with an
ammeter.
19.The purpose of the heat anticipator is to_____? - ANSWER ✔ reduce the
temperature swing of a conditioned space
20.The difference between system overshoot and system lag is called___. -
ANSWER ✔ temperature swing
21.What is meant by the term detent? - ANSWER ✔ rapid making and breaking
of a contact
22.The heat anticipator in the thermostat control circuit in the heating mode is
active when the ____. - ANSWER ✔ heating contact is closed
23.The heater/ resistor in the thermostat control circuit in the cooling mode is
active when the _____. - ANSWER ✔ cooling contact is open
24.To properly set the heat anticipator the _____ must determine what the
current flow is through the heating circuit when the furnace is operating in a
steady state condition. - ANSWER ✔ heating technician
25.The cold anticipator is wired in ____ with the mercury bulb cooling contacts
and is energized during the off cycle. - ANSWER ✔ parallel
, 26.Line voltage thermostats have heavier contacts and use which type of
sensing element bimetal, bellows, remote bulb, and all of the above. -
ANSWER ✔ all of the above
27.To obtain an accurate reading of a fluid in a large pipe a technician
should____. - ANSWER ✔ use a permanently mounted thermometer in a
well
28.A low pressure control has a "high event" and a "differential" setting the
technician wants the system to turn on at 28 psig and shutdown at 2 psig.
What would be the proper setting. - ANSWER ✔ High event 28 psig and
Differential 26 psig
29.If the suction pressure of a system is 60 psig and the oil pump outlet is 85
psig. What is the net oil pressure. - ANSWER ✔ 25 psig
30.Oil pressure safety controls measures the difference is pressure to establish
____. - ANSWER ✔ that positive oil pressure is present
31.To prove that the combustion blower motor is operating before ignition a
_____ would be used. - ANSWER ✔ pressure differential switch
32.To control ice build up on a heat pump outdoor coil in the heating cycle a
___ is attached to a large diaphram. - ANSWER ✔ micro-switch
33.Where would a water regulating valve that is controlling head pressure be
installed. - ANSWER ✔ water circuit at inlet condenser
