HVAC Final Exam Electrical For Air Conditioning Questions And Answers 100% Pass
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Course
HVAC
Institution
HVAC
HVAC Final Exam Electrical For Air
Conditioning Questions And Answers 100%
Pass
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 w...
HVAC Final Exam Electrical For Air
Conditioning Questions And Answers 100%
Pass
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 - answer✔A) When Using a single transformer system
Digital thermostats usually display temperature, time of day, programming and operating status.
Select one:
True
False - answer✔True
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 - answer✔b. run continuously
What is the most common type of T-sat in the HVAC industry?
Select one:
d. None of the above - answer✔c. Low voltage
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 - answer✔b. Fan Center
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 - answer✔b. OL
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 - answer✔b. Cooling Contactor
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
d. run - answer✔a. primary
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 - answer✔b. Overloading the control circuit
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 - answer✔c. Indoor fan Relay
Contactors are rated according to the maximum amperage through the;
Select one:
a. coil
b. contacts
c. thermostat
d. fuse - answer✔b. contacts
A cooling thermostat ___________________________.
Select one:
a. opens on temp. rise
b. closes on temp. rise - answer✔b. closes on temp. rise
When ohming out a load what reading should the technician get?
Select one:
a. 0
b. OL
c. Some Number
d. Source Voltage - answer✔c. Some Number
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
c. Source Voltage
d. Infinity - answer✔a. 0
When a technician is taking a volt reading across an open switch in an energized circuit what
should the reading be?
Select one:
a. 0
b. OL
c. Source Voltage
d. Infinity - answer✔c. Source Voltage
Most thermostats in the HVAC industry are 120 volts.
Select one:
True
False - answer✔False
Where does the "R" terminal of a thermostat connect to?
Select one:
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