How long should the circulating pump be run to ensure the system is full when filling a hot oil system?

How long should the circulating pump be run to ensure the system is full when filling a hot oil system?




a) 1 or 2 hours
b) 3 or 4 hours
c) 9 or 10 hours
d) 12 to 18 hours
e) 24 hours


Answer: B


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