In a single effect evaporator, the economy is________________?
In a single effect evaporator, the economy is________________?
A. 1
B. < 1
C. > 1
D. None of these
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Which is the most suitable for the concentration of foamy & frothy liquors ?
Which is the most suitable for the concentration of foamy & frothy liquors ?A. Agitated film evaporator
B. Long tube vertical evaporator
C. Open pan evaporator
D. None of theseAmong liquids, water has a comparatively high value of thermal conductivity, due to its__________________?
Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?A. Low density
B. High viscosity
C. Partial ionisation
D. Dense structureThe main function of baffles provided in a shell and tube heat exchanger is to______________?
The main function of baffles provided in a shell and tube heat exchanger is to______________?A. Facilitate the cleaning of outer tube surface
B. Enhance turbulence
C. Hold the tubes in position
D. All A , B & CWhich of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?A. Dittus-Boelter equation
B. Sieder-Tate equation
C. Nusselt equation
D. None of theseIf 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 twoWith increase in temperature, the thermal conductivity of non-metallic amorphous solids_________________?
With increase in temperature, the thermal conductivity of non-metallic amorphous solids_________________?A. Decreases
B. Increases
C. Remain constant
D. First decreases upto certain temperature and then increases