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HVAC Final Exam Electrical For Air Conditioning Questions And Correct Answers

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HVAC Final Exam Electrical For Air Conditioning Questions And Correct Answers Q.When using a low voltage T-stat for heating and cooling, when would there be a jumper between Rh and Rc? Select one: a. When using a single transformer system b. When heating with an oil boiler c. When heating with a gas boiler d. When using a two transformer system - ANSWERS-A) When Using a single transformer system Q.Digital thermostats usually display temperature, time of day, programming and operating status. Select one: True False - ANSWERS-True Q.With the fan switch in the on position, the indoor fan will,,, Select one: a. Run in cooling mode b. run continuously c. run only when the outdoor unit runs d. none of the above - ANSWERS-b. run continuously Q.What is the most common type of T-sat in the HVAC industry? Select one: a. Line voltage b. Remote bulb c. Low voltage d. None of the above - ANSWERS-c. Low voltage Q.What device is added to a oil or gas forced hot air system when it is not AC ready? Select one: a. Fan limit switch b. Fan Center c. Multi Stage Thermostat d. Mars Relay - ANSWERS-b. Fan Center Q.When a technician is taking an ohm reading across an open switch what should the reading be? Select one: a. 0 b. OL c. Source Voltage d. Some Number - ANSWERS-b. OL Q.What does the "Y" terminal connect to on a wall mounted low voltage T-stat? Select one: a. Outdoor fan relay b. Cooling Contactor c. Primary side of transformer d. Indoor fan relay - ANSWERS-b. Cooling Contactor Q.In a transformer the ______________________ winding is the windings to which voltage is supplied and is considered the load side of the transformer. Select one: a. primary b. secondary c. start d. run - ANSWERS-a. primary Q.What would be the cause of a transformer failure? Select one: a. Compressor amps too high for circuit b. Overloading the control circuit c. Underloading the control circuit d. None of the above - ANSWERS-b. Overloading the control circuit Q.What does the "G" terminal control on a low voltage wall mounted T-sat? Select one: a. Outdoor fan Relay b. Cooling Relay c. Indoor fan Relay d. Heat Relay - ANSWERS-c. Indoor fan Relay

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HVAC Final Exam Electrical For Air
Conditioning Questions And Correct
Answers



\Q\.When using a low voltage T-stat for heating and cooling, when would there be a jumper
between Rh and Rc?

Select one:

a. When using a single transformer system

b. When heating with an oil boiler

c. When heating with a gas boiler

d. When using a two transformer system - ANSWERS✔-A) When Using a single transformer
system



\Q\.Digital thermostats usually display temperature, time of day, programming and operating
status.

Select one:

True

False - ANSWERS✔-True



\Q\.With the fan switch in the on position, the indoor fan will,,,

Select one:

a. Run in cooling mode

b. run continuously

c. run only when the outdoor unit runs

,d. none of the above - ANSWERS✔-b. run continuously



\Q\.What is the most common type of T-sat in the HVAC industry?

Select one:

a. Line voltage

b. Remote bulb

c. Low voltage

d. None of the above - ANSWERS✔-c. Low voltage



\Q\.What device is added to a oil or gas forced hot air system when it is not AC ready?

Select one:

a. Fan limit switch

b. Fan Center

c. Multi Stage Thermostat

d. Mars Relay - ANSWERS✔-b. Fan Center



\Q\.When a technician is taking an ohm reading across an open switch what should the reading
be?

Select one:

a. 0

b. OL

c. Source Voltage

d. Some Number - ANSWERS✔-b. OL



\Q\.What does the "Y" terminal connect to on a wall mounted low voltage T-stat?

Select one:

,a. Outdoor fan relay

b. Cooling Contactor

c. Primary side of transformer

d. Indoor fan relay - ANSWERS✔-b. Cooling Contactor



\Q\.In a transformer the ______________________ winding is the windings to which voltage is
supplied and is considered the load side of the transformer.

Select one:

a. primary

b. secondary

c. start

d. run - ANSWERS✔-a. primary



\Q\.What would be the cause of a transformer failure?

Select one:

a. Compressor amps too high for circuit

b. Overloading the control circuit

c. Underloading the control circuit

d. None of the above - ANSWERS✔-b. Overloading the control circuit



\Q\.What does the "G" terminal control on a low voltage wall mounted T-sat?

Select one:

a. Outdoor fan Relay

b. Cooling Relay

c. Indoor fan Relay

d. Heat Relay - ANSWERS✔-c. Indoor fan Relay

, \Q\.Contactors are rated according to the maximum amperage through the;



Select one:

a. coil

b. contacts

c. thermostat

d. fuse - ANSWERS✔-b. contacts



\Q\.A cooling thermostat ___________________________.

Select one:

a. opens on temp. rise

b. closes on temp. rise - ANSWERS✔-b. closes on temp. rise



\Q\.When ohming out a load what reading should the technician get?

Select one:

a. 0

b. OL

c. Some Number

d. Source Voltage - ANSWERS✔-c. Some Number



\Q\.When a technician is taking a volt reading across a closed switch in an energized circuit what
should the reading be?

Select one:

a. 0

b. OL

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Infos sur le Document

Publié le
9 janvier 2026
Nombre de pages
38
Écrit en
2025/2026
Type
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