Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is

Heat Transfer
Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is

0.6

0.5

0.4

0.7

0.6

0.5

0.4

0.7

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Heat Transfer
Rate of heat transfer by vaporisation from pools of water is affected by the

All of these

Surface tension of water

Nature of heating surface and distribution of bubbles

Viscosity of water

All of these

Surface tension of water

Nature of heating surface and distribution of bubbles

Viscosity of water

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Heat Transfer
Water always boils when its

Vapour pressure equals 76 cm of Hg

Temperature reaches 100° C

Saturated vapour pressure equals the external pressure on its surface

Saturated vapour pressure is less than the atmospheric pressure

Vapour pressure equals 76 cm of Hg

Temperature reaches 100° C

Saturated vapour pressure equals the external pressure on its surface

Saturated vapour pressure is less than the atmospheric pressure

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Heat Transfer
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

Εx + εy

(εx + εy)/(εx + εy - εx . εy)

1/εx + 1/εy

Εx . εy

Εx + εy

(εx + εy)/(εx + εy - εx . εy)

1/εx + 1/εy

Εx . εy

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Heat Transfer
The unit of heat transfer co-efficient in SI unit is

J/M2°K

J/m°K

W/m°K

W/m2°K

J/M2°K

J/m°K

W/m°K

W/m2°K

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Heat Transfer
Which of the following has the lowest Prandtl number?

Water

Molten sodium (a coolant used in fast breeder reactor)

Transformer oil

Dilute H₂SO₄

Water

Molten sodium (a coolant used in fast breeder reactor)

Transformer oil

Dilute H₂SO₄

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Heat Transfer

Heat Transfer Rate of heat transfer by vaporisation from pools of water is affected by the

Heat Transfer Water always boils when its

Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

Heat Transfer The unit of heat transfer co-efficient in SI unit is

Heat Transfer Which of the following has the lowest Prandtl number?

Heat Transfer
Rate of heat transfer by vaporisation from pools of water is affected by the

Heat Transfer
Water always boils when its

Heat Transfer
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

Heat Transfer
The unit of heat transfer co-efficient in SI unit is

Heat Transfer
Which of the following has the lowest Prandtl number?