A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when

Heat Transfer
A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when

KA>2 kB

KA < 0.5kB

CPA < CPB

CPA > CPB

KA>2 kB

KA < 0.5kB

CPA < CPB

CPA > CPB

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Heat Transfer
The driving potential for the crystal growth during crystallisation is the __________ of the solution.

Concentration

Density

Viscosity

Super-saturation

Concentration

Density

Viscosity

Super-saturation

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Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

There is no additional cost of pumping

Most concentrated liquid is at highest temperature

Heat sensitive material can be handled

Equal heat transfer co-efficients exist in various effects

There is no additional cost of pumping

Most concentrated liquid is at highest temperature

Heat sensitive material can be handled

Equal heat transfer co-efficients exist in various effects

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Heat Transfer
At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical?

1

1.5

0.5

80

1

1.5

0.5

80

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Heat Transfer
In pipe flow, heat is transferred from hot wall to the liquid by

Free and forced convection

Conduction only

Forced convection and conduction

Forced convection only

Free and forced convection

Conduction only

Forced convection and conduction

Forced convection only

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Heat Transfer
The units of resistance to heat transfer is

W⁻¹m²K

W.m⁻².K⁻¹

J.m⁻².K⁻¹

J.m⁻¹.K⁻¹

W⁻¹m²K

W.m⁻².K⁻¹

J.m⁻².K⁻¹

J.m⁻¹.K⁻¹

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Heat Transfer

Heat Transfer The driving potential for the crystal growth during crystallisation is the __________ of the solution.

Heat Transfer The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical?

Heat Transfer In pipe flow, heat is transferred from hot wall to the liquid by

Heat Transfer The units of resistance to heat transfer is

Heat Transfer
The driving potential for the crystal growth during crystallisation is the __________ of the solution.

Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat Transfer
At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical?

Heat Transfer
In pipe flow, heat is transferred from hot wall to the liquid by

Heat Transfer
The units of resistance to heat transfer is