HVAC 03302 EXAM QUESTIONS WITH REVISED ANSWERS
A simple capacity control method that provides capacity steps of 2550 and 75 using a plug valve can be found on - Answer-screw compressor
Slide valves allow screw compressors to vary capacity from - Answer-full capacity 100% to 10%
Throttling v...
HVAC 03302 EXAM QUESTIONS
WITH REVISED ANSWERS
A simple capacity control method that provides capacity steps of 2550 and 75 using a
plug valve can be found on - Answer-screw compressor
Slide valves allow screw compressors to vary capacity from - Answer-full capacity 100%
to 10%
Throttling valves are used for capacity control on - Answer-Centrifugal compressor
Flooded starts might be traced back to a - Answer-Failed crankcase heater
Freezing of a systems expansion device is an indication of - Answer-Moisture in the
system
Purging refrigerant lines with nitrogen while brazing prevents - Answer-Copper oxide
formation
About how many times above the normal running current value will be measured if a 3
phase compressor motor is single phasing - Answer-1-1/2 times
Which statement about internal line break over load is correct - Answer-Automatically
resets
For single phase compressor which current carrying lead does a current transformer
monitor current in - Answer-The common
High and low pressure safety switches are installed in series of the compressors -
Answer-Control circuit
What type of oil pressure safety switch is used on semi hermetic compressors - Answer-
Differential
The system condition that can cause a compressors motors overload device to open is -
Answer-A dirty condenser coil
The system condition that can cause the vapor returning to the compressor to become
superheated beyond normal is - Answer-Uninsulated suction line
what happens in reciprocating compressor when lowest point - Answer-Suction valve
closes
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