A. Steady state conduction
B. Natural convection
C. Forced convection
D. Radiation
A. Scaling characteristics
B. High viscosity
C. Both A. & B.
D. Neither A. nor B.
A. Colburn
B. Reynolds
C. Prandtl
D. None of these
A. Strouhal number
B. Sherwood number
C. Euler number
D. Grashoff number
A. Is thicker than hydrodynamic boundary layer
B. Is thinner than hydrodynamic boundary layer
C. And the hydrodynamic boundary layers are identical
D. Disappears
A. On polished surfaces
B. On rough surfaces
C. In the absence of agitation
D. None of these
A. 0.5
B. < 0.5
C. > 0.6
D. < 0.1
A. 1200 W/m2.K
B. 894 W/m2.K
C. 333 W/m2.K
D. 287 W/m2.K
A. Grashoff
B. Nusselt
C. Prandtl
D. Stanton
A. Increases
B. Decreases
C. Remain constant
D. May increase or decrease, depends on the vacuum