Temperature of steam at around 540°C can be measured by

Heat and Mass Transfer
Temperature of steam at around 540°C can be measured by

None of these

Thermometer

Thermocouple

Thermistor

None of these

Thermometer

Thermocouple

Thermistor

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Heat and Mass Transfer
The thermal diffusivities for solids are generally

More than those for liquids and gases

Less than those for liquids

More or less same as for liquids and gases

Less than those for gases

More than those for liquids and gases

Less than those for liquids

More or less same as for liquids and gases

Less than those for gases

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Heat and Mass Transfer
Thermal conductivity of solid metals with rise in temperature normally

Decreases

May increase or decrease depending on temperature

Remain constant

Increases

Decreases

May increase or decrease depending on temperature

Remain constant

Increases

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Heat and Mass Transfer
The value of the wave length for maximum emissive power is given by

Planck’s law

Kirchhoff’s law

Wine’s law

Stefan’s law

Planck’s law

Kirchhoff’s law

Wine’s law

Stefan’s law

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Heat and Mass Transfer
Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ρ = Density of fluid, cp = Specific heat at constant pressure, and μ = Coefficient of absolute viscosity)

RN = ρ V l /μ

RN = μ cp/k

RN = hl/k

RN = V²/t.cp

RN = ρ V l /μ

RN = μ cp/k

RN = hl/k

RN = V²/t.cp

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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

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

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

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

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

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

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Heat and Mass Transfer

Heat and Mass Transfer Temperature of steam at around 540°C can be measured by

Heat and Mass Transfer The thermal diffusivities for solids are generally

Heat and Mass Transfer Thermal conductivity of solid metals with rise in temperature normally

Heat and Mass Transfer The value of the wave length for maximum emissive power is given by

Heat and Mass Transfer Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ρ = Density of fluid, cp = Specific heat at constant pressure, and μ = Coefficient of absolute viscosity)

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

Heat and Mass Transfer
Temperature of steam at around 540°C can be measured by

Heat and Mass Transfer
The thermal diffusivities for solids are generally

Heat and Mass Transfer
Thermal conductivity of solid metals with rise in temperature normally

Heat and Mass Transfer
The value of the wave length for maximum emissive power is given by

Heat and Mass Transfer
Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ρ = Density of fluid, cp = Specific heat at constant pressure, and μ = Coefficient of absolute viscosity)

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