Related Questions

In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by
A Liquid pump
B Generator
C Absorber and generator
D Absorber, generator and liquid pump
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system
A Is as light as possible
B Has very high C.O.P
C Employs minimum quantity of refrigerant
D Consumer minimum horse power
One Ton of Refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice---
A In 1 hour
B In 24 hour
C In 10 minutes
D In 12 hour
A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?
A Vapor compression cycle using expansion valve
B Air refrigeration cycle
C Vapor compression cycle using expansion engine
D Carnot refrigeration cycle
Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is
A Positive
B Negative
C Zero
D Infinity
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
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in
A Condenser
B Evaporator
C Absorber
D None of these
In a lithium bromide absorption refrigeration system
A Lithium bromide is used as a refrigerant and water as an absorbent
B Water is used as a refrigerant and lithium bromide as an absorbent
C Ammonia is used as a refrigerant and lithium bromide as an absorbent
D None of the above
In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
A It considerably reduces mass of the system
B It improves the C.O.P., as the condenser is small
C The positive work in isentropic expansion of liquid is very small
D It leads to significant cost reduction
In vapour compression refrigeration system, refrigerant occurs as liquid between
A Condenser and expansion valve
B Compressor and evaporator
C Expansion valve and evaporator
D Compressor and condenser

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