Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is________________?

A. √(A1 . A2)
B. √(A1 + A2)
C. ½ √(A1 . A2)
D. 2 √(A1 . A2)

A. Re and Pr
B. Re and Gr
C. Pr and Gr
D. Re and Sc

A. Kcal/hr. m2 °C
B. Kcal/hr.m.°C
C. Kcal/hr.m
D. Kcal/hr. °C

A. 0.06 to 120
B. 0.6 to 120
C. 1 to 103
D. 1 to 50

A. Heat flux
B. Nusselt number
C. Prandtl number
D. Schmidt number

A. Long tube
B. Falling film
C. High pressure
D. None of these