Chemical Heat Transfer

Which of the following is directly concerned with the heat transfer ?

Byadmin March 2, 2019August 24, 2021

Which of the following is directly concerned with the heat transfer ?

A. Strouhal number
B. Sherwood number
C. Euler number
D. Grashoff number

Chemical Heat Transfer

In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient______________?

In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient______________?

A. Increases
B. Decreases
C. Is not affected
D. May increase or decrease; depends on the feed

Read More In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient______________?
Chemical Heat Transfer

Duhring‟s rule is important in solving problems on__________________?

Duhring‟s rule is important in solving problems on__________________?

A. Distillation
B. Crystallisation
C. Evaporation
D. Humidification

Read More Duhring‟s rule is important in solving problems on__________________?
Chemical Heat Transfer

The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re)0.8 (Pr)0.4] cannot be used for________________?

The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re)0.8 (Pr)0.4] cannot be used for________________?

A. Low Reynold’s number
B. Very low Grashoff number
C. Molten metals
D. All A., B. and C.

Read More The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re)0.8 (Pr)0.4] cannot be used for________________?
Chemical Heat Transfer

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows ____________ law?

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows ____________ law?

A. Hyperbolic
B. Parabolic
C. Linear
D. Logarithmic

Read More If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows ____________ law?
Chemical Heat Transfer

A BTU/hr.ft.2 °F is equal to_________________?

A BTU/hr.ft.2 °F is equal to_________________?

A. 1 kcal/hr. m2°C
B. 4.88 kcal/hr. m.2°C
C. 1 kcal/hr. m2.°K
D. None of these

Read More A BTU/hr.ft.2 °F is equal to_________________?
Chemical Heat Transfer

In forced convection, the heat transfer depends on _______________?

In forced convection, the heat transfer depends on _______________?

A. Re, Pr
B. Re, Gr
C. Mainly Gr
D. Re only

Read More In forced convection, the heat transfer depends on _______________?

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