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HVAC Final Exam Electrical For Air Conditioning 2024 Questions With Complete Solutions!!
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HVAC Final Exam Electrical For Air Conditioning 2024 Questions With Complete Solutions!!
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Name: Score:161 Multiple choice questions
Term 1 of 161
When ohming out a load what reading should the technician get?
Select one:
0
OL
Some Number
Source Voltage
Term 2 of 161
When a technician is taking an ohm reading across a closed switch what should the reading be?
Select one:
0
OL
Some Number
Source Voltage
Term 3 of 161
A low-pressure safety control is set to shut down the compressor in the event of refrigerant loss.
Select one:
True
False
,Term 4 of 161
What is measured across an open switch
Select one:
voltage
continuity
current
0 volts
Term 5 of 161
If the contact points of a thermostatic motor control were to open very slowly, electric arcing
could burn the contacts.
Select one:
True
False
Term 6 of 161
Heat travels from ______________to __________________
Select one:
High pressure/Low Pressure
Warm/Cold
Low pressure/High Pressure
Cold/warm
,Definition 7 of 161
CSIR
The hot gas line is always connected between the ____.
Select one:
a. compressor and the condenser
b. compressor and the reversing valve
c. reversing valve and the accumulator
d. reversing valve and the condenser
This motor is not commonly found in AC units.It has a centrifugal switch or start relay to
remove the start capacitor and start winding from the circuity once it reaches 75% of its
rated RPM's
This compressor is the newest type of compressor and has no intake or discharge valves
except a check valve on the discharge. It has very little wear and tear because it has so few
moving parts.
The starting winding is wound with finer wire than the running winding so it has greater
resistance.
Select one:
True
False
Definition 8 of 161
Control point
The desired conditioned.
The present condition as it is measured
Required in the start winding to energize a potential relay coil.
A device that changes an input energy into mechanical motion.
, Term 9 of 161
This compressor is used in large commercial refrigeration systems over 50 tons. It uses impellers
or wheels and has no valves or pistons and operates at high speeds
Rotary Compressor
Sensor
Centrifugal Compressor
Screw Compressor
Term 10 of 161
The fuses for a motor in an HVACR system are usually factory-installed within the compressor
dome.
Select one:
True
False
Term 11 of 161
An above-atmospheric-pressure element is used to control heating units.
Select one:
True
False
Term 12 of 161
A substance's atoms ____ when heat is applied to the substance.
Select one:
stop moving
move more rapidly
move into a crystalline formation
move more slowly
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