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Heat Transfer MCQs: 986 Questions & Answers in Engineering

986 Heat Transfer MCQs in Engineering with answers & explanations. Practice objective questions for competitive exams, interviews & self-assessment — free on… Use the answer toggle below to show or hide all solutions, tap an option to check one question, or open a question for its own page.

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Heat Transfer MCQs: 986 Questions & Answers in Engineering

Absorptivity of a body will be equal to its emissivity

A steam pipe is to be insulated by two insulating materials put over each other. For best results

A perfect black body is one which

A non-dimensional number generally associated with natural convection heat transfer is

A grey body is one whose absorptivity

40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is

Planck's law holds good for

If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of

According of Kirchhoff's law,

Depending on the radiating properties, body will be transparent when

According to Prevost theory of heat exchange

According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a

According to Stefan-Boltzmann law, ideal radiators emit radiant energy at a rate proportional to

According to Stefan's law, the total radiation from a black body per second per unit area is proportional to

All radiations in a black body are

According to Wien's law, the wavelength corresponding to maximum energy is proportion to

Cork is a good insulator because it has

Depending on the radiating properties, a body will be black when

Depending on the radiating properties, a body will be opaque when

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