According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour) Pb = pa × pv Pb = pa - pv Pb = pa + pv Pb = pa/pv TRUE ANSWER : ? YOUR ANSWER : ?
According to Newton's law of cooling, the heat transfer from a hot body to a cold body is Directly proportional to the difference of temperatures between the two bodies Directly proportional to the surface area Either (A) or (B) Both (A) and (B) TRUE ANSWER : ? YOUR ANSWER : ?
Thermal conductivity of water _________ with rise in temperature. May increase or decrease depending upon temperature Decreases Remain same Increases TRUE ANSWER : ? YOUR ANSWER : ?
The product of Reynolds number and Prandtl number is known as Stanton number Peclet number Biot number Grashoff number TRUE ANSWER : ? YOUR ANSWER : ?
The expression Q = ρ AT4 is called Fourier equation Stefan-Boltzmann equation Joseph-Stefan equation Newton Reichmann equation TRUE ANSWER : ? YOUR ANSWER : ?
Moisture would find its way into insulation by vapour pressure unless it is prevented by High vapour pressure High thickness of insulation Less thermal conductivity insulator A vapour seal TRUE ANSWER : ? YOUR ANSWER : ?
Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity) P = 0, x = 1 and a = 0 X = 0, a + p = 1 P=1, T = 0 and a = 0 P = 0, x = 0 and a = 1 TRUE ANSWER : ? YOUR ANSWER : ?
The thermal diffusivities for solids are generally Less than those for gases More than those for liquids and gases More or less same as for liquids and gases Less than those for liquids 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 Conduction and convection Conduction Convection Radiation TRUE ANSWER : ? YOUR ANSWER : ?