## 1. Nusselt number (N_{N}) is given by

_{N}) is given by

## 2. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

## 3. The undesirable property of a refrigerant is

## 4. The desirable property of a refrigerant is

## 5. The operating pressure for refrigerating units using R-12 as a refrigerant is

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