Heat exchanger tubes are never made of_________________?
Heat exchanger tubes are never made of_________________?
A. Plain carbon steel
B. Stainless steel
C. Lead
D. Copper
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The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter D. as _________________?
The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter D. as _________________?A. D-1.8
B. D-0.2
C. D0.2
D. D1.8Dittus-Boelter equation used for the determination of heat transfer co-efficient is valid ___________________?
Dittus-Boelter equation used for the determination of heat transfer co-efficient is valid ___________________?A. For fluids in laminar flow
B. For fluids in turbulent flow
C. When Grashoff number is very important
D. For liquid metalsIn Biot number, the characteristic length used is the ratio of the _______________ of the solid?
In Biot number, the characteristic length used is the ratio of the _______________ of the solid?A. Volume to surface area
B. Perimeter to surface area
C. Surface area to volume
D. Surface area to perimeterSmall scale evaporation is done in a_________________?
Small scale evaporation is done in a_________________?A. Heat exchanger
B. Condenser
C. Multiple effect evaporator
D. Steam jacketed kettleThe non-dimensional temperature gradient in a liquid at the wall of a pipe is the ____________________?
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 numberThe purpose of floating head in a heat exchanger is to_________________?
The purpose of floating head in a heat exchanger is to_________________?A. Avoid buckling of tubes
B. Provide support for tubes
C. Decrease the pressure drop
D. Facilitate its lengthening, if needed