The most commonly used method for the design of duct size is the

Heat and Mass Transfer
The most commonly used method for the design of duct size is the

Equal friction method

Dual or double method

Velocity reduction method

Static regains method

Equal friction method

Dual or double method

Velocity reduction method

Static regains method

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Heat and Mass Transfer
Sensible heat is the heat required to

Convert water into steam and superheat it

Increase the temperature of a liquid of vapour

Change liquid into vapour

Change vapour into liquid

Convert water into steam and superheat it

Increase the temperature of a liquid of vapour

Change liquid into vapour

Change vapour into liquid

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Heat and Mass Transfer
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by

Conduction and convection

Radiation

Convection

Conduction

Conduction and convection

Radiation

Convection

Conduction

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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 one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

All of these

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

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 one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

All of these

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

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
The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is

Less than one

Greater than one

Equal to one

Equal to Nusselt number

Less than one

Greater than one

Equal to one

Equal to Nusselt number

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Heat and Mass Transfer
When heat is transferred by molecular collision, it is referred to as heat transfer by

Conduction

Scattering

Radiation

Convection

Conduction

Scattering

Radiation

Convection

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Heat and Mass Transfer

Heat and Mass Transfer The most commonly used method for the design of duct size is the

Heat and Mass Transfer Sensible heat is the heat required to

Heat and Mass Transfer When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by

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

Heat and Mass Transfer The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is

Heat and Mass Transfer When heat is transferred by molecular collision, it is referred to as heat transfer by

Heat and Mass Transfer
The most commonly used method for the design of duct size is the

Heat and Mass Transfer
Sensible heat is the heat required to

Heat and Mass Transfer
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by

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

Heat and Mass Transfer
The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is

Heat and Mass Transfer
When heat is transferred by molecular collision, it is referred to as heat transfer by