Absolute temperature

Square of the absolute temperature

Cube of the absolute temperature

Fourth power of the absolute temperature

D. Fourth power of the absolute temperature

First law of thermodynamics

Newton's law of cooling

Newton's law of heating

Stefan's law

Grey body

Brilliant white polished body

Red hot body

Black body

P = 0, x = 0 and a = 1

P=1, x = 0, and a = 0

P = 0, T= 1, and a = 0

X = 0, a + p = 1

Thermal conductivity to the equivalent thickness of the film of fluid

Temperature drop through the films of fluids to the thickness of film of fluids

Thickness of film of fluid to the thermal conductivity

Thickness of film of fluid to the temperature drop through the films of fluids

Direct mixing of hot and cold fluids

A complete separation between hot and cold fluids

Flow of hot and cold fluids alternately over a surface

Generation of heat again and again

One dimensional cases only

Two dimensional cases only

Three dimensional cases only

Regular surfaces having non-uniform temperature gradients

Increases

Decreases

Remain constant

May increase or decrease depending on temperature

0.002

0.02

0.01

0.1

Varies with temperature

Varies with the wave length of incident ray

Varies with both

Does not vary with temperature and wave length of the incident ray

Absolute temperature (T)

I²

F

T

20°C

40°C

60°C

66.7°C

Emissivity

Transmissivity

Reflectivity

Intensity of radiation

Energy transferred by convection to that by conduction

Kinematic viscosity to thermal diffusivity

Inertia force to viscous force

None of the above

Increase

Decrease

Remain unaffected

May increase/decrease depending on temperature and thickness of insulation

Thermal coefficient

Thermal resistance

Thermal conductivity

None of these

The time taken to attain the final temperature to be measured

The time taken to attain 50% of the value of initial temperature difference

The time taken to attain 63.2% of the value of initial temperature difference

Determined by the time taken to reach 100°C from 0°C

_{min}/U

_{min}

_{min}

_{min}

Stanton number

Nusselt number

Biot number

Peclet number

Absolute temperature

Square of the absolute temperature

Cube of the absolute temperature

Fourth power of the absolute temperature

h₁ + h₂ + h₃

(h₁.h₂.h₃)1/3

1/h₁ + 1/h₂ + 1/h₃

None of these

Thermometer

Thermistor

Thermocouple

None of these

Move actually

Do not move actually

Affect the intervening medium

Does not affect the intervening medium

k. A. (dT/dx)

k. A. (dx/dT)

k. (dT/dx)

k. (dx/dT)

Conduction

Convection

Radiation

Conduction and radiation combined

Its temperature

Nature of the body

Kind and extent of its surface

All of the above

Composition

Density

Porosity

All of the above

Watt/cm² °K

Watt/cm4 °K

Watt²/cm °K⁴

Watt/cm² °K⁴

K cal/kg m² °C

K cal m/hr m² °C

K cal/hr m² °C

K calm/hr °C

Face area

Time

Thickness

Temperature difference

Directly proportional to thermal conductivity

Inversely proportional to density of substance

Inversely proportional to specific heat

All of the above