General Studies · Refrigeration and Air Conditioning
In refrigeration and air conditioning systems, manual isolation and regulation valves are primarily used to control the flow of __________ throughout the piping loop.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1ambient air
- 2refrigerant✓
- 3nitrogen gas
- 4milk
Correct answer
refrigerant
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