Chemical Heat Transfer

Kirchoff’s law is applicable to________________?

Byadmin March 2, 2019August 24, 2021

Kirchoff’s law is applicable to________________?

A. Monochromatic radiation only
B. Total radiation only
C. Both A. and B.
D. Only volumes and not to surfaces

Chemical Heat Transfer

1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________?

1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________?

A. 15 min
B. 22 min
C. 44 min
D. 51 min

Read More 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________?
Chemical Heat Transfer

The ratio of kinematic viscosity to thermal diffusivity is called the _______________ number?

The ratio of kinematic viscosity to thermal diffusivity is called the _______________ number?

A. Peclet
B. Prandtl
C. Stanton
D. Nusselt

Read More The ratio of kinematic viscosity to thermal diffusivity is called the _______________ number?
Chemical Heat Transfer

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

A. Temperature of the body only
B. Wavelength of monochromatic radiation
C. Both A. and B.
D. Nature of material of body

Read More As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
Chemical Heat Transfer

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

A. Square pitch
B. Triangular pitch
C. Diagonal square pitch
D. None of these

Read More Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?
Chemical Heat Transfer

Leidenfrost point is a term concerned with the____________________?

Leidenfrost point is a term concerned with the____________________?

A. Condensation of the saturated vapor on a cold surface
B. Concentration of a corrosive solution by evaporation
C. Heat transfer between two highly viscous liquids
D. Boiling of a liquid on a hot surface

Read More Leidenfrost point is a term concerned with the____________________?
Chemical Heat Transfer

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

A. Heat the water from 0°C to 100°C
B. Evaporate the water
C. To superheat the steam
D. Data insufficient, can’t be predicted

Read More One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

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