Type III — Low-PressureQuestion 167 of 24087% of test-takers answer this correctly

Water entering the refrigerant side of a low-pressure chiller through a leaking tube is dangerous mainly because it can:

a.Cause acid formation and corrosion
b.Increase cooling capacity
c.Improve oil return
d.Lower the refrigerant's boiling point

Explanation

Water that leaks into the refrigerant side reacts to form acids, corrodes metal parts, can freeze and damage tubes, and contaminates the refrigerant. Because the chiller runs under vacuum, a tube leak lets cooling water be pulled inward. Any sign of water intrusion calls for investigation, not just resetting controls.

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