Heat Transfer – Page 2 – HI MCQ!

A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be?

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The pressure at the outlet of a refrigerant compressor is called?

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In larger industrial and commercial reciprocating compression systems, refrigerent widely used is?

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Kirchhoff’s law states that?

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the total radiation from a black body per second per unit area is directly proportional to the fourth power of the absolute temperature
the wave length corresponding to the maximum energy is proportional to the absolute temperature
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
none of the above

The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called?

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Conduction is a process of heat transfer?

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The refrigerant widely used in domestic refrigerators is?

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Environmental protection agencies advice against the use of chloro-fluoro-carbon refrigerants since?

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For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is?

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The operating pressure for refrigerating units using R-12 as a refrigerant is?

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