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

CPA < CPB

CPA > CPB

KA < 0.5kB

KA>2 kB

CPA < CPB

CPA > CPB

KA < 0.5kB

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Heat Transfer
If Prandtl number is greater than the Schmidt number, then the

thermal boundary layer lies inside the concentration boundary layer

concentration boundary layer lies inside the thermal boundary layer

thermal & concentration boundary layers are of equal thickness

none of the listed here

thermal boundary layer lies inside the concentration boundary layer

concentration boundary layer lies inside the thermal boundary layer

thermal & concentration boundary layers are of equal thickness

none of the listed here

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Heat Transfer
The purpose of providing a 'catchall' in the vapor line of an evaporator is to

Arrest the entrained liquid

Vent the non-condensible gases

Regulate the vapor flow

Create vacuum

Arrest the entrained liquid

Vent the non-condensible gases

Regulate the vapor flow

Create vacuum

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Heat Transfer
An insulator should have

Low thermal conductivity

Less resistance to heat flow

A porous structure

High thermal conductivity

Low thermal conductivity

Less resistance to heat flow

A porous structure

High thermal conductivity

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Heat Transfer
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Initially decreases and remains constant thereafter

Equal to 45°C

More than 45°C

Less than 45°C

Initially decreases and remains constant thereafter

Equal to 45°C

More than 45°C

Less than 45°C

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Heat Transfer
The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by

Forced convection

Steady state conduction

Natural convection

Transient conduction

Forced convection

Steady state conduction

Natural convection

Transient conduction

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Heat Transfer

Heat Transfer If Prandtl number is greater than the Schmidt number, then the

Heat Transfer The purpose of providing a 'catchall' in the vapor line of an evaporator is to

Heat Transfer An insulator should have

Heat Transfer In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Heat Transfer The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by

Heat Transfer
If Prandtl number is greater than the Schmidt number, then the

Heat Transfer
The purpose of providing a 'catchall' in the vapor line of an evaporator is to

Heat Transfer
An insulator should have

Heat Transfer
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Heat Transfer
The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by