Prandtl number is the reciprocal of

Heat Transfer
Prandtl number is the reciprocal of

Thermal diffusivity/Momentum diffusivity

Thermal diffusivity x Mass diffusivity

Mass diffusivity x Momentum diffusivity

Thermal diffusivity x Momentum

Thermal diffusivity/Momentum diffusivity

Thermal diffusivity x Mass diffusivity

Mass diffusivity x Momentum diffusivity

Thermal diffusivity x Momentum

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Heat Transfer
Radiation heat transfer rates does not depend upon the

distance between the heat source and the object receiving the heat

type of absorbing surface

surface area and temperature of the heat source

none of the listed here

distance between the heat source and the object receiving the heat

type of absorbing surface

surface area and temperature of the heat source

none of the listed here

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Heat Transfer
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

2hi/K

hi/K

2K/h0

K/h0

2hi/K

hi/K

2K/h0

K/h0

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Heat Transfer
The purpose of providing bleed points in the evaporator is to

Remove the product

Facilitate removal of non-condensable gases

Admit the feed

Create vacuum

Remove the product

Facilitate removal of non-condensable gases

Admit the feed

Create vacuum

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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

CPA > CPB

CPA < CPB

KA < 0.5kB

KA>2 kB

CPA > CPB

CPA < CPB

KA < 0.5kB

KA>2 kB

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Heat Transfer
Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)

U₁ - U₂

1/U₁ - 1/U₂

U₂ - U₁

1/U₂ - 1/U₁

U₁ - U₂

1/U₁ - 1/U₂

U₂ - U₁

1/U₂ - 1/U₁

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Heat Transfer

Heat Transfer Prandtl number is the reciprocal of

Heat Transfer Radiation heat transfer rates does not depend upon the

Heat Transfer The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

Heat Transfer The purpose of providing bleed points in the evaporator is to

Heat Transfer Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)

Heat Transfer
Prandtl number is the reciprocal of

Heat Transfer
Radiation heat transfer rates does not depend upon the

Heat Transfer
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

Heat Transfer
The purpose of providing bleed points in the evaporator is to

Heat Transfer
Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)