The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as Forced convection Radiation Free convection Conduction TRUE ANSWER : ? YOUR ANSWER : ?
The heat is transferred by conduction, convection and radiation in Boiler furnaces None of these Condensation of steam in condenser Melting of ice TRUE ANSWER : ? YOUR ANSWER : ?
If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of 270 3 9 81 TRUE ANSWER : ? YOUR ANSWER : ?
Free convection flow depends on Density Coefficient of viscosity Gravitational force All of these TRUE ANSWER : ? YOUR ANSWER : ?
Conduction is a process of heat transfer 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 From one particle of the body to another without the actual motion of the particles None of these TRUE ANSWER : ? YOUR ANSWER : ?
The heat transfer takes place according to First law of thermodynamics Kirchhoff's law Second law of thermodynamics Zeroth law of thermodynamics TRUE ANSWER : ? YOUR ANSWER : ?
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as Emissivity Transmissivity Intensity of radiation Reflectivity TRUE ANSWER : ? YOUR ANSWER : ?
A steam pipe is to be insulated by two insulating materials put over each other. For best results Inferior insulation should be put over pipe and better one over it Whether to put inferior OIL over pipe or the better one would depend on steam temperature Better insulation should be put over pipe and better one over it Both may be put in any order TRUE ANSWER : ? YOUR ANSWER : ?
The expression Q = ρ AT4 is called Fourier equation Newton Reichmann equation Stefan-Boltzmann equation Joseph-Stefan equation TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to Peclet number Grashoff number Stanton number Biot number TRUE ANSWER : ? YOUR ANSWER : ?