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Mechanical Engineering Objective Questions { Refrigeration and AC }



1. Pick up the wrong statement. A refrigerant should have
A.Low specific heat of liquid
B.High boiling point
C.High latent heat of vaporisation
D.Higher critical temperature

2. Vapour compression refrigeration is somewhat like
A.Carnot cycle
B.None of the above.
C.Reversed Carnot cycle
D.Reversed Rankine gcle

3. Ammonia-absorption refrigeration cycle requires
A.Very little work input
B.Maximum work input
C.Nearly same work input as for vapour compression cycle
D.Zero work input

4. An important characteristic of absorption system of refrigeration is
A.Noisy operation
B.Quiet operation
C.Cooling below 0?C
D.Very little power consumption

5. The relative coefficient of performance is actual COP/theoretical COP
A.(b) theoretical COP/actual COP
B.(c) actual COP x theoretical COP
C.(d) 1?actual COP x theoretical COP
D.(e) 1-actual COP/theoretical COP.

6. Clapeyron equation is a relation between
A.Temperature, pressure and enthalpy
B.Temperature, pressure, specific volume ancrenthalpy.
C.Temperature and enthalp_y
D.Temperature, pressure, and specific volunte

7. Clapeyron equation is applicable for region at
A.Saturation point a vapour
B.Saturation point of liquid
C.Sublimation temperature
D.Triple point

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