A. Brick
B. Air
C. Water
D. Silver
Which of the following has the highest thermal conductivity ? Read More »
Chemical Heat Transfer A. Avoid cavitation
B. Avoid frequent priming
C. Create more suction head
D. None of these
Circulation pump is located below the evaporator to___________________? Read More »
Chemical Heat Transfer A. Steam pressure
B. Feed temperature
C. Number of effect
D. Both B. & C.
Economy of an evaporator is influenced by the_____________________? Read More »
Chemical Heat Transfer A. Non-dimensional factor
B. Factor of safety
C. Conversion factor for individual film heat transfer co-efficient to overall heat transfer coefficient
D. None of these
A. Buffer zone
B. Turbulent core
C. Both A. and B.
D. Viscous sub-layer
A. Atmospheric
B. Sub-atmospheric
C. Negative
D. Very high
Film boiling occurs at ________________ pressure? Read More »
Chemical Heat Transfer A. Thickness of the wall
B. Area of the wall perpendicular to heat flow
C. Material of the wall
D. Temperature difference between the two surfaces of the wall
A. 1
B. < 1
C. > 1
D. > 5
A. High viscosity liquid is to be cooled
B. Requirement of heat transfer area is low
C. Overall heat transfer co-efficient is very high
D. A corrosive liquid is to be heated
Double pipe heat exchangers are preferably useful, when____________________? Read More »
Chemical Heat Transfer A. Decreases
B. Increases
C. Increases exponentially
D. Remain unaffected
