The eddy momentum diffusivity the thermal diffusivity and the mass diffusivity will be the same for
A.NPr = NSc = 0.7
B.NPr = NSc = 1
C.NPr = NSc = 7.02
D.NPr = NSc = 297
Category: Chemical Engineering Mcqs
In case of white body, absorptivity is
A.Zero
B.Between 0 to 0.5
C.More than 0.5
D.1
Actual flame temperature is always lower than the adiabatic flame temperature because
A.there is always loss of heat from the flame
B.it is impossible to obtain complete combustion at high temperature
C.both (a) and (b)
D.neither (a) nor (b)
The surface which diffusely reflects and emits the same amount of energy which it receives by radiation is known as
A.A perfect black surface
B.A perfect grey surface
C.A perfect white surface
D.A perfect radiating surface
E.None of the above
Dynamic similarity is the similarity of
A.Shape
B.Forces
C.Velocities
D.Effective dimensions
E.None of the above
Plaster of Paris is
A.CaSO4.2H2O
B.CaSO4
C.CaSO4.
D.CaSO4.1
The temperature of sun can be measured using a
A.standard thermometer
B.radiation pyrometer
C.platinum resistance thermometer
D.mercury thermometer
Which of the following statements is correct
A.Cp can never be less than Cv
B.Cp is always equal to Cv
C.Cp may be less than Cv depending on the gas
D.Cp may be equal to or less than Cv
An isentropic flow is one which is
A.adiabatic and reversible
B.adiabatic and irreversible
C.isothermal and reversible
D.isothermal and irreversible
