Chemical Heat Transfer

A. Has the unit m2 /sec
B. Is defined as K/ρ . Cp
C. Is the ratio of thermal conductivity to thermal capacity
D. All A., B. and C.

A. Temperature difference
B. Heat flux
C. That across the entire pipe
D. None of these

A. Kcal/hr. m2 °C
B. Kcal/hr.m.°C
C. Kcal/hr.m
D. Kcal/hr. °C

A. Both the tube sheets fixed
B. Both the tube sheets floating
C. The top tube sheet floating and bottom tube sheet fixed
D. The top tube sheet fixed and the bottom tube-sheet floating

A. 0
B. 1
C. 0.5
D. 0.90

A. Watt/m.°K
B. Watt/m2. °K
C. Watt/m2. °K
D. Watt/m4. °K

A. Conduction only
B. Forced convection only
C. Forced convection and conduction
D. Free and forced convection

A. Thermal conductivity
B. Thickness
C. Temperature difference
D. Heat transfer area

A. Increase
B. Decrease
C. Remain unchanged
D. Either increase or decrease; depends on the coolant flow rate

A. Planck’s law
B. Kirchhoff’s law
C. Wien’s law
D. Stefan-Boltzmann law