The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

Heat Transfer
The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

(D)1.8

(D)-0.2

(D)-1.8

(D)0.2

(D)1.8

(D)-0.2

(D)-1.8

(D)0.2

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Heat Transfer
Which of the following is generally considered as opaque surface towards radiations?

Liquids

Both solids & liquids

Gases

Solids

Liquids

Both solids & liquids

Gases

Solids

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Heat Transfer
Heat exchanger tubes are never made of

Plain carbon steel

Stainless steel

Lead

Copper

Plain carbon steel

Stainless steel

Lead

Copper

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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

0.85

0.55

0.35

0.45

0.85

0.55

0.35

0.45

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Heat Transfer
Leidenfrost point is a term concerned with the

Concentration of a corrosive solution by evaporation

Condensation of the saturated vapor on a cold surface

Heat transfer between two highly viscous liquids

Boiling of a liquid on a hot surface

Concentration of a corrosive solution by evaporation

Condensation of the saturated vapor on a cold surface

Heat transfer between two highly viscous liquids

Boiling of a liquid on a hot surface

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Heat Transfer
A BTU/hr.ft.2 °F is equal to

None of these

1 kcal/hr. m².°K

1 kcal/hr. m²°C

4.88 kcal/hr. m.2°C

None of these

1 kcal/hr. m².°K

1 kcal/hr. m²°C

4.88 kcal/hr. m.2°C

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Heat Transfer

Heat Transfer The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

Heat Transfer Which of the following is generally considered as opaque surface towards radiations?

Heat Transfer Heat exchanger tubes are never made of

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 Leidenfrost point is a term concerned with the

Heat Transfer A BTU/hr.ft.2 °F is equal to

Heat Transfer
The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

Heat Transfer
Which of the following is generally considered as opaque surface towards radiations?

Heat Transfer
Heat exchanger tubes are never made of

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
Leidenfrost point is a term concerned with the

Heat Transfer
A BTU/hr.ft.2 °F is equal to