Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?

Byadmin March 3, 2019August 24, 2021

Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?

A. Dittus-Boelter equation
B. Sieder-Tate equation
C. Nusselt equation
D. None of these

Chemical Heat Transfer

In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell) ?

In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell) ?

A. D/5 and D
B. D/2 and 2 D
C. D/4 and 2 D
D. D and 2 D

Read More In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell) ?
Chemical Heat Transfer

Radiation energy is emitted by all the substances, which are above____________________?

Radiation energy is emitted by all the substances, which are above____________________?

A. 0°K
B. 0°C
C. 100°C
D. Room temperature

Read More Radiation energy is emitted by all the substances, which are above____________________?
Chemical Heat Transfer

The critical radius ‘r’ of insulation on a pipe is given by____________________?

The critical radius ‘r’ of insulation on a pipe is given by____________________?

A. r = 2k/h
B. r = k/h
C. r = k/2h
D. r = h/k

Read More The critical radius ‘r’ of insulation on a pipe is given by____________________?
Chemical Heat Transfer

Removal of ______________ heat is involved in the condensation of a vapor under saturated conditions?

Removal of ______________ heat is involved in the condensation of a vapor under saturated conditions?

A. Super
B. Sensible
C. Latent
D. Both B. & C.

Read More Removal of ______________ heat is involved in the condensation of a vapor under saturated conditions?
Chemical Heat Transfer

Overall heat transfer co-efficient for cooling of hydrocarbons by water is about_________________?

Overall heat transfer co-efficient for cooling of hydrocarbons by water is about_________________?

A. 50 -100 Kcal/hr.m2.°C
B. 50 -100 W/m2.°K
C. 50 -100 BTU/hr. ft.2°F
D. 1000 – 1500 BTU/hr. ft.2°F

Read More Overall heat transfer co-efficient for cooling of hydrocarbons by water is about_________________?
Chemical Heat Transfer

In a heat exchanger, floating head is provided to____________________?

In a heat exchanger, floating head is provided to____________________?

A. Facilitate cleaning of the exchanger
B. Increase the heat transfer area
C. Relieve stresses caused by thermal expansion
D. Increase log mean temperature gradient

Read More In a heat exchanger, floating head is provided to____________________?

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