Better insulation should be put over pipe and better one over it

Inferior insulation should be put over pipe and better one over it

Both may be put in any order

Whether to put inferior OIL over pipe or the better one would depend on steam temperature

Glass

Water

Plastic

Air

One dimensional cases only

Two dimensional cases only

Three dimensional cases only

Regular surfaces having non-uniform temperature gradients

-1/3

-2/3

1

-1

One

Two

Three

Four

Energy transferred by convection to that by conduction

Kinematic viscosity to thermal diffusivity

Inertia force to viscous force

None of the above

Grashoff number

Nusselt number

Weber number

Prandtl number

Fourier equation

Stefan-Boltzmann equation

Newton Reichmann equation

Joseph-Stefan equation

From one particle of the body to another without the actual motion of the particles

From one particle of the body to another by the actual motion of the heated particles

From a hot body to a cold body, in a straight line, without affecting the intervening medium

None of the above

In conduction, reduction in the thickness of the material and an increase in thermal conductivity.

In convection, stirring of the fluid and cleaning the heating surface.

In radiation, increasing the temperature and reducing the emissivity.

All of the above

h = k/ ρS

h = ρS/k

h = S/ρk

h = kρ/S

Conduction

Convection

Radiation

Conduction and convection

Cold body to hot body

Hot body to cold body

Smaller body to larger body

Larger body to smaller body

Black radiation

Full radiation

Total radiation

All of these

Stanton number

Biot number

Peclet number

Grashoff number

W/m²K

W/m²

W/mK

W/m

Electric heater

Steam condenser

Boiler

Refrigerator condenser coils

Iron

Lead

Concrete

Wood

K cal/kg m² °C

K cal m/hr m² °C

K cal/hr m² °C

K calm/hr °C

Equal to one

Greater than one

Less than one

Equal to Nusselt number

Conduction

Convection

Radiation

None of these

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

Temperature

Thickness

Area

Time

Irregular surfaces

Nonuniform temperature surfaces

One dimensional cases only

Two dimensional cases only

Below which a gas does not obey gas laws

Above which a gas may explode

Below which a gas is always liquefied

Above which a gas will never liquefied

Black body

Grey body

Opaque body

White body

0.45

0.55

0.40

0.75

Less than those for gases

Less than those for liquids

More than those for liquids and gases

More or less same as for liquids and gases

Grashoff number

Biot number

Stanton number

Prandtl number

First law of thermodynamics

Newton's law of cooling

Newton's law of heating

Stefan's law