Engineering MCQs

The index which corelates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

by
mean radiant temperature
effective temperature
dew point temperature
none of these
✅ The correct answer is option B.

Which of the following statement is correct according to Clausis statement of second law off thermodynamics?

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It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
none of the above
✅ The correct answer is option B.

A castle nut is a locking device in which

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a thinner nut is tightened down over a thicker or main nut and the main nut is tightened against the thinner nut by loosening
a slot is cut in line with the centre of each face and a split pin passes through two slots in the nut and a hole in the bolt, so that a positive lock is obtained unless the pin shears
a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction
the bottom cylindrical
✅ The correct answer is option B.