A. Is not the same as baffle pitch
B. Should be less than one fifth the diameter of the shell
C. Should be less than the inside diameter of the shell
D. None of these
Related Mcqs:
- Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter)?
A. 0.2 D
B. 0.5 D
C. 0.66 D
D. 0.80 D - In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell) ?
A. D/5 and D
B. D/2 and 2 D
C. D/4 and 2 D
D. D and 2 D - If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?
A. Remains unchanged
B. Increases
C. Increases or decreases depending on number of shell passes
D. Decreases - In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass _____________ through the heat exchanger ?
A. Once
B. Twice
C. Thrice
D. Four times - In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?
A. Increases
B. Decreases
C. Does not affect
D. May increase or decrease, depends on the type of baffle - In a forward feed multiple effect evaporator, the pressure is ____________________?
A. Highest in last effect
B. Lowest in last effect
C. Same in all effects
D. Dependent on the number of effects - The non-dimensional temperature gradient in a liquid at the wall of a pipe is the ____________________?
A. Heat flux
B. Nusselt number
C. Prandtl number
D. Schmidt number - Nusselt number is the ratio of the ____________________?
A. Temperature gradient of the wall to that across the entire pipe
B. Temperature difference to the temperature gradient at the wall
C. Heat flux at the wall to that across the entire pipe
D. None of these - Rate of heat transfer by vaporisation from pools of water is affected by the ____________________?
A. Nature of heating surface and distribution of bubbles
B. Surface tension of water
C. Viscosity of water
D. All A., B. and C. - Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?
A. Thin walled having the value of Ao Ai/< 2
B. Thick walled
C. Having the value of Ao/Ai > 2
D. Both B. and C.
