Chemical Heat Transfer

A. 0
B. 0.5
C. 1
D. 5

A. q = [2π k (Ti + T0)/2]/ln (ri/r0)
B. q = 2π ri k (Ti – T0)/(r0/ri)
C. q = 2π k (Ti – T0)/(r0/ri)
D. q = 2π k (Ti – T0)/[(r0 + ri)/2]

A. Increase by 1.8 times
B. Decrease by 22
C. Increase by 216
D. Remain unchanged

A. Condensation
B. Grashoff
C. Stanton
D. Brinkman

A. Keeping the heat transfer surface clean
B. Enhancing the fluid pumping rate
C. Increasing the tube length
D. None of these

A. Open pan evaporation
B. Long tube vertical evaporator
C. Agitated film evaporator
D. None of these

A. Ellipse
B. Straight line
C. Parabola
D. Circular arc

A. White & rough
B. Black & rough
C. White & polished
D. Black & polished

A. Mass diffusivity to thermal diffusivity
B. Momentum diffusivity to thermal diffusivity
C. Thermal diffusivity to mass diffusivity
D. Thermal diffusivity to momentum diffusivity

A. Nature of heating surface and distribution of bubbles
B. Surface tension of water
C. Viscosity of water
D. All A., B. and C.