A. Conduction
B. Radiation
C. Condensation
D. Natural convection
Thermal diffusivity is the most important in heat transfer by__________________? Read More »
Chemical Heat Transfer A. 0
B. 1
C. > 1
D. < 1
A. Stefan-Boltzmann’s
B. Planck’s
C. Wien’s displacement
D. None of these
A. Low density
B. High viscosity
C. Partial ionisation
D. Dense structure
A. Transient heat conduction
B. Natural convection
C. Forced convection
D. Radiation
In which mode of heat transfer, the Biot number is important ? Read More »
Chemical Heat Transfer A. Absorbs
B. Reflects
C. Transmits
D. None of these
A diathermanous substance _______________ the thermal radiation completely? Read More »
Chemical Heat Transfer A. Increases rapidly with temperature rise
B. Is almost independent of temperature
C. Is almost independent of pressure
D. Both B. and C
Boiling point elevation of a solution of NaOH _____________________? Read More »
Chemical Heat Transfer A. √d
B. d
C. d2
D. d1.5
A. Maximum resistance in the series
B. Sum of all resistances
C. Average of all resistances
D. Minimum resistance presents in the series
A. 0.5
B. 1
C. > 2
D. 1.5
Prandtl and Reynolds analogy are same, when Prandtl number is____________________? Read More »
Chemical Heat Transfer