Presence of a non-condensing gas in a condensing vapour___________________?

Byadmin March 2, 2019August 24, 2021

Presence of a non-condensing gas in a condensing vapour___________________?

A. Increases the rate of condensation
B. Decreases thermal resistance
C. Is desirable to increase the film co-efficient
D. None of these

Chemical Heat Transfer

200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 × 10-3 kg/m2.s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m2/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)?

200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 × 10-3 kg/m2.s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m2/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)?

A. 0.5
B. 0.05
C. 0.1
D. 0.15

Read More 200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 × 10-3 kg/m2.s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m2/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)?
Chemical Heat Transfer

Baffle spacing ____________________?

Baffle spacing ____________________?

A. Is not the same as baffle pitch
B. Should be less than one fifth the diameter of the shell
C. Should be less than the inside diameter of the shell
D. None of these

Read More Baffle spacing ____________________?
Chemical Heat Transfer

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?

A. Nusselt number
B. Sherwood number
C. Schmidt number
D. Stanton number

Read More The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?
Chemical Heat Transfer

LMTD for counter-flow and parallel flow heat exchanger will be the same, when the_________________?

LMTD for counter-flow and parallel flow heat exchanger will be the same, when the_________________?

A. Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)
B. Outlet temperature of both the hot and cold fluid are same
C. Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid
D. None of these

Read More LMTD for counter-flow and parallel flow heat exchanger will be the same, when the_________________?
Chemical Heat Transfer

Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?

Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?

A. Liquid density
B. Liquid viscosity
C. Hot surface temperature
D. Interfacial tension

Read More Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?
Chemical Heat Transfer

In natural convection heat transfer, the correlating parameter is the_______________________?

In natural convection heat transfer, the correlating parameter is the_______________________?

A. Graetz number
B. Eckert number
C. Grashoff number
D. Bond number

Read More In natural convection heat transfer, the correlating parameter is the_______________________?

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