The transfer of heat by molecular collision is known as None of these Radiation Conduction Convection TRUE ANSWER : ? YOUR ANSWER : ?
Depending on the radiating properties, a body will be opaque when P = 0, x = 1 and a = 0 X = 0, a + p = 1 P = 0, x = 0 and a = 1 P=1, x = 0 and a = 0 TRUE ANSWER : ? YOUR ANSWER : ?
The amount of heat flow through a body by conduction is Directly proportional to the surface area of the body Directly proportional to the temperature difference on the two faces of the body All of these Dependent upon the material of the body TRUE ANSWER : ? YOUR ANSWER : ?
Heat flows from one body to other when they have Different heat contents Different atomic structure Different temperatures Different specific heat TRUE ANSWER : ? YOUR ANSWER : ?
Film coefficient is defined as the ratio of Thickness of film of fluid to the temperature drop through the films of fluids Temperature drop through the films of fluids to the thickness of film of fluids Thickness of film of fluid to the thermal conductivity Thermal conductivity to the equivalent thickness of the film of fluid TRUE ANSWER : ? YOUR ANSWER : ?
In case of liquids and gases, the heat transfer takes place according to Conduction Radiation None of these Convection TRUE ANSWER : ? YOUR ANSWER : ?
The use of heat exchangers is made in Radiators in automobile Condensers and boilers in steam plants Condensers and evaporators in refrigeration and air conditioning units All of these TRUE ANSWER : ? YOUR ANSWER : ?
When heat is transferred by molecular collision, it is referred to as heat transfer by Conduction Scattering Convection Radiation TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of the energy absorbed by the body to total energy falling on it is called Emissive power Emissivity Absorptivity Absorptive power TRUE ANSWER : ? YOUR ANSWER : ?
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by Radiation Conduction and convection Convection Conduction TRUE ANSWER : ? YOUR ANSWER : ?