Chemical Heat Transfer

Which type of heat exchanger is preferred for heavy heat loads ?

Byadmin March 3, 2019August 24, 2021

Which type of heat exchanger is preferred for heavy heat loads ?

A. Double pipe
B. Plate fine
C. Series and parallel set of shell and tube
D. None of these

Chemical Heat Transfer

The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

A. More
B. Less
C. Same
D. Unpredictable

Read More The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?
Chemical Heat Transfer

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?

A. Condensation
B. Grashoff
C. Stanton
D. Brinkman

Read More A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?
Chemical Heat Transfer

The unit of conductance in SI unit is_______________?

The unit of conductance in SI unit is_______________?

A. W/m
B. W/m2
C. W/°K
D. W/m°K

Read More The unit of conductance in SI unit is_______________?
Chemical Heat Transfer

Prandtl number is the reciprocal of____________________?

Prandtl number is the reciprocal of____________________?

A. Thermal diffusivity/Momentum diffusivity
B. Thermal diffusivity × Momentum
C. Thermal diffusivity × Mass diffusivity
D. Mass diffusivity × Momentum diffusivity

Read More Prandtl number is the reciprocal of____________________?
Chemical Heat Transfer

The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?

The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?

A. 25°C
B. 30°C
C. 35°C
D. 40°C

Read More The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?
Chemical Heat Transfer

For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ?

For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ?

A. Δt
B. Δt2
C. Δt3
D. √(Δt)

Read More For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ?

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