Curioustab

Home » Mechanical Engineering » Heat Transfer, Refrigeration and Air Conditioning

A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

1.33
2.33
3.33
4.33

Correct Answer: 2.33

← Previous Question Next Question→

More Questions from Heat Transfer, Refrigeration and Air Conditioning

In a vapour compression system, the condition of refrigerant is dry saturated vapour
The vertical and uniformly spaced lines on a psychrometric chart indicates
A furnace is made of a red brick wall of thickness 0.5 m and conductivity 0.7 W/mK. For the same heat loss and temperature drop, this can be replaced by a layer of diatomite earth of conductivity 0.14 W/mK and thickness
The coefficient of performance of a domestic refrigerator is __________ as compared to a domestic air-conditioner.
The rate of heat flow through a body is . The term is known as temperature gradient.
The dehumidification process, on the psychrometric chart, is shown by
The transfer of heat by molecular collision is known as
A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is
During sensible cooling of air, the relative humidity increases.
Wein's law states that the wave length corresponding to __________ is proportional to the absolute temperature.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion