Log mean temperature difference in case of counter flow compared to parallel flow will be________________?

Related Mcqs:

Which of the following is the case of heat transfer by radiation ___________________?

A. blast furnace B. heating of building C. cooling of parts in furnace D. heat received by a person from fireplace E. all of the above...

The amount of heat flow through a body by conduction is_______________?

A. directly proportional to the surface area of the body B. directly proportional to the temperature difference on the two faces of the body C. dependent upon the material of the body D. inversely proportional to the thickness of the body E. all of the above...

According of Kirchhoff’s law______________________?

A. radiant heat is proportional to fourth power of absolute temperature B. emissive power depends on temperature C. emissive power and absorptivity are constant for all bodies D. ratio of emissive power to absorptive power is maximum for perfectly black body E. ratio of emissive power to absorptive power for all bodies is same and … According of Kirchhoff’s law______________________?Read More...

The unit of Stefan Boltzmann constant is ____________________?

A. watt/cm2 °K B. watt/cm4 °K C. watt2/cm °K4 D. watt/cm2 °K4 E. watt/cm2 °K2...

Depending on the radiating properties, a body will be white when_________________?

A. p = 0, x = 0 and a = 1 B. p=l,T = 0anda = 0 C. p = 0, x = 1 and a = 0 D. x = 0, a + p = 1 E. a = 0, x + p = 1. where a = absorptivity, p = reflectivity, x = … Depending on the radiating properties, a body will be white when_________________?Read More...