A refrigeration system loses 0.75 lb over a measured 3-hour interval. Assuming a constant rate only for this exercise, what is the average mass-loss rate?
- A2.25 lb/h
- 0.25 lb/h
- C4 lb/h
- D0.75 lb/h
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why B is correct
0.75 / 3 = 0.25 lb/h. Calculating a rate does not make the loss acceptable or define a permitted leakage threshold.