Chemical Heat Transfer

Fqra cold viscous feed, backward feed gives _____________ than forward feed?

Byadmin March 2, 2019August 24, 2021

Fqra cold viscous feed, backward feed gives _____________ than forward feed?

A. A higher capacity
B. A lower capacity
C. Lower economy
D. None of these

Chemical Heat Transfer

Crystallisation of solids from a homogeneous solution is a/an ______________ process?

Crystallisation of solids from a homogeneous solution is a/an ______________ process?

A. Exothermic
B. Mildly endothermic
C. Highly endothermic
D. None of these

Read More Crystallisation of solids from a homogeneous solution is a/an ______________ process?
Chemical Heat Transfer

A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is__________________?

A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is__________________?

A. 6000
B. 24000
C. 60000
D. 48000

Read More A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is__________________?
Chemical Heat Transfer

The rate of emission of radiation by a body does not depend upon the__________________?

The rate of emission of radiation by a body does not depend upon the__________________?

A. Wavelength of radiation
B. Surface temperature of the body
C. Nature of the surface
D. Shape and porosity of the body

Read More The rate of emission of radiation by a body does not depend upon the__________________?
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) ?
Chemical Heat Transfer

For a laminar flow of fluid in a circular tube, ‘h1’ is the convective heat transfer co-efficient at velocity ‘V1’. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is________________?

For a laminar flow of fluid in a circular tube, ‘h1’ is the convective heat transfer co-efficient at velocity ‘V1’. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is________________?

A. 1.26 h1
B. 0.794 h1
C. 0.574 h1
D. 1.741 h1

Read More For a laminar flow of fluid in a circular tube, ‘h1’ is the convective heat transfer co-efficient at velocity ‘V1’. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is________________?
Chemical Heat Transfer

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

A. Economiser
B. Regenerator
C. Ceramic recuperator
D. None of these

Read More Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

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