A non-dimensional number generally associated with natural convection heat transfer is

Heat and Mass Transfer
A non-dimensional number generally associated with natural convection heat transfer is

Prandtl number

Grashoff number

Weber number

Nusselt number

Prandtl number

Grashoff number

Weber number

Nusselt number

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Heat and Mass Transfer
Pick up the wrong case. Heat flowing from one side to other depends directly on

Time

Temperature difference

Face area

Thickness

Time

Temperature difference

Face area

Thickness

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Heat and Mass Transfer
Total heat is the heat required to

Convert water into steam and superheat it

Increase the temperature of a liquid or vapour

Change vapour into liquid

Change liquid into vapour

Convert water into steam and superheat it

Increase the temperature of a liquid or vapour

Change vapour into liquid

Change liquid into vapour

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Heat and Mass Transfer
Which of the following is a case of steady state heat transfer?

None of these

Air preheaters

Heating of building in winter

I.C. engine

None of these

Air preheaters

Heating of building in winter

I.C. engine

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Heat and Mass Transfer
Unit of thermal conductivity in S.I. units is

J/m °K sec

W/m °K

J/m² sec

Option (B) and (C) above

J/m °K sec

W/m °K

J/m² sec

Option (B) and (C) above

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Heat and Mass Transfer
Thermal conductivity of a material may be defined as the

Quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C

Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

All of these

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces

Quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C

Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

All of these

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces

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Heat and Mass Transfer

Heat and Mass Transfer A non-dimensional number generally associated with natural convection heat transfer is

Heat and Mass Transfer Pick up the wrong case. Heat flowing from one side to other depends directly on

Heat and Mass Transfer Total heat is the heat required to

Heat and Mass Transfer Which of the following is a case of steady state heat transfer?

Heat and Mass Transfer Unit of thermal conductivity in S.I. units is

Heat and Mass Transfer Thermal conductivity of a material may be defined as the

Heat and Mass Transfer
A non-dimensional number generally associated with natural convection heat transfer is

Heat and Mass Transfer
Pick up the wrong case. Heat flowing from one side to other depends directly on

Heat and Mass Transfer
Total heat is the heat required to

Heat and Mass Transfer
Which of the following is a case of steady state heat transfer?

Heat and Mass Transfer
Unit of thermal conductivity in S.I. units is

Heat and Mass Transfer
Thermal conductivity of a material may be defined as the