Baffle spacing ____________________?

Byadmin March 3, 2019August 24, 2021

Baffle spacing ____________________?

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

Chemical Heat Transfer

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is______________?

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is______________?

A. 1.66
B. 88.66
C. 3.66
D. Dependent on NRe only

Read More The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is______________?
Chemical Heat Transfer

If Prandtl number is greater than the Schmidt number, then the____________________?

If Prandtl number is greater than the Schmidt number, then the____________________?

A. Thermal boundary layer lies inside the concentration boundary layer
B. Concentration boundary layer lies inside the thermal boundary layer
C. Thermal & concentration boundary layers are of equal thickness
D. Hydrodynamic (i.e., momentum) boundary layer is thicker than the other two

Read More If Prandtl number is greater than the Schmidt number, then the____________________?
Chemical Heat Transfer

_______________ paint has the maximum absorption coefficient ?

_______________ paint has the maximum absorption coefficient ?

A. Black
B. Yellow
C. White
D. Grey

Read More _______________ paint has the maximum absorption coefficient ?
Chemical Heat Transfer

The sum of reflectivity and absorptivity for an opaque body is equal to____________________?

The sum of reflectivity and absorptivity for an opaque body is equal to____________________?

A. 0.5
B. 1
C. 0
D. 2

Read More The sum of reflectivity and absorptivity for an opaque body is equal to____________________?
Chemical Heat Transfer

The critical radius ‘r’ of insulation on a pipe is given by____________________?

The critical radius ‘r’ of insulation on a pipe is given by____________________?

A. r = 2k/h
B. r = k/h
C. r = k/2h
D. r = h/k

Read More The critical radius ‘r’ of insulation on a pipe is given by____________________?
Chemical Heat Transfer

Multiple effect evaporation is generally recommended, when the______________________?

Multiple effect evaporation is generally recommended, when the______________________?

A. Large scale evaporation of liquor is needed
B. Corrosive liquids are to be concentrated
C. Fuel is cheaply available
D. Evaporation on small scale is to be done

Read More Multiple effect evaporation is generally recommended, when the______________________?

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