In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?

Byadmin March 2, 2019August 24, 2021

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?

A. Equal to
B. More than
C. Less than
D. Either more or less than (depending upon the fluid)

Chemical Heat Transfer

The energy radiated from a surface Q at absolute temperature T is related as__________________?

The energy radiated from a surface Q at absolute temperature T is related as__________________?

A. Q ∝ T2
B. Q ∝ T4
C. Q ∝ T3
D. None of these

Read More The energy radiated from a surface Q at absolute temperature T is related as__________________?
Chemical Heat Transfer

Use of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?

Use of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?

A. Rate of heat transfer
B. Flow velocity
C. Turbulence of shell side fluid
D. All A., B. and C.

Read More Use of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?
Chemical Heat Transfer

Prandtl and Reynolds analogy are same, when Prandtl number is____________________?

Prandtl and Reynolds analogy are same, when Prandtl number is____________________?

A. 0.5
B. 1
C. > 2
D. 1.5

Read More Prandtl and Reynolds analogy are same, when Prandtl number is____________________?
Chemical Heat Transfer

Steam trap is used to_________________?

Steam trap is used to_________________?

A. Condense the steam flowing in the pipeline
B. Remove water resulting from partial condensation of steam
C. Stop the supply of steam
D. None of these

Read More Steam trap is used to_________________?
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

Prandtl number is the ratio of________________?

Prandtl number is the ratio of________________?

A. Momentum diffusivity to mass diffusivity
B. Momentum diffusivity to thermal diffusivity
C. Thermal diffusivity to mass diffusivity
D. Thermal diffusivity to momentum diffusivity

Read More Prandtl number is the ratio of________________?

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