Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

Heat Transfer
Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

0.55

0.45

0.35

0.85

0.55

0.45

0.35

0.85

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Heat Transfer
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

goes through a minimum

continues to increase

goes through a maximum.

continues to decrease

goes through a minimum

continues to increase

goes through a maximum.

continues to decrease

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Heat Transfer
A graph between __________ is called Wilson plot.

V0.8 Vs . U

1/v0.8 Vs . U

1/U Vs . 1/V

1/U Vs . 1/v0.8

V0.8 Vs . U

1/v0.8 Vs . U

1/U Vs . 1/V

1/U Vs . 1/v0.8

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Heat Transfer
Which of the following has the minimum absorptivity?

Iron plates

Refractory bricks

Coal dust

Aluminium foil

Iron plates

Refractory bricks

Coal dust

Aluminium foil

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Heat Transfer
In a boiling curve, the peak heat flux is called the __________ point.

Leidenfrost

Nusselt

Boiling

Burnout

Leidenfrost

Nusselt

Boiling

Burnout

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Heat Transfer
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?

Agitated film evaporator

Calenderia vertical tube evaporator

Horizontal tube evaporator

Long vertical evaporator

Agitated film evaporator

Calenderia vertical tube evaporator

Horizontal tube evaporator

Long vertical evaporator

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Heat Transfer

Heat Transfer Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

Heat Transfer As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

Heat Transfer A graph between __________ is called Wilson plot.

Heat Transfer Which of the following has the minimum absorptivity?

Heat Transfer In a boiling curve, the peak heat flux is called the __________ point.

Heat Transfer Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?

Heat Transfer
Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

Heat Transfer
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

Heat Transfer
A graph between __________ is called Wilson plot.

Heat Transfer
Which of the following has the minimum absorptivity?

Heat Transfer
In a boiling curve, the peak heat flux is called the __________ point.

Heat Transfer
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?