Heat transfer takes place as per Zeroth law of thermodynamics Kirchoff's law Second law of the thermodynamics First law of thermodynamic TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Wien's law Kirchhoff's law Stefan's law Planck's law TRUE ANSWER : ? YOUR ANSWER : ?
The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body Do not move actually Does not affect the intervening medium Move actually Affect the intervening medium TRUE ANSWER : ? YOUR ANSWER : ?
Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature. Minimum energy None of these Both (A) and (B) Maximum energy TRUE ANSWER : ? YOUR ANSWER : ?
Thermal conductivity of non-metallic amorphous solids with decrease in temperature May increase or decrease depending on temperature Remain constant Increases Decreases TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a case of steady state heat transfer? None of these Air preheaters Heating of building in winter I.C. engine TRUE ANSWER : ? YOUR ANSWER : ?
In heat exchangers, degree of approach is defined as the difference between temperatures of Hot medium outlet and cold water outlet Hot medium inlet and outlet Cold water inlet and outlet Hot medium outlet and cold water inlet TRUE ANSWER : ? YOUR ANSWER : ?
Thermal conductivity of water _________ with rise in temperature. Increases May increase or decrease depending upon temperature Remain same Decreases TRUE ANSWER : ? YOUR ANSWER : ?
Temperature of steam at around 540°C can be measured by Thermometer None of these Thermistor Thermocouple TRUE ANSWER : ? YOUR ANSWER : ?