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.Management Sciences
Category: Refrigeration and Air Conditioning
In a refrigeration system, heat absorbed in comparison to heat rejected is_________________?
A. more
B. less
C. same
D. more for small capacity and less for high capacity
E. less for small capacity and more for high capacity
Most of the domestic refrigerators work on the following refrigeration system _________________?
A. vapour compression
B. vapour absorption
C. carnot cycle
D. electrolux refrigerator
E. dual cycle
In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?
A. less than 2 kg
B. more than or equal to 3.65 kg
C. more than 10 kg
D. there is no such consideration
E. pone of the above
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
E. its input only in the form of heating
One ton refrigeratiqn corresponds to_________________?
A. 50 kcal/min
B. 50 kcal/kr
C. 80 kcal/min
D. 80 kcal/hr
E. 1000 kcal/day
Short horizontal lines on pressure-enthalpy chart show__________________?
A. constant pressure lines
B. constant temperature lines
C. constant total heat lines
D. constant entropy lines
E. constant volume lines
For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?
A. small
B. high
C. euqal
D. anything
E. under some conditions small and under some conditions high
Air refrigeration operates on_____________________?
A. Carnot cycle
B. Reversed Carnot cycle
C. Rankine cycle
D. Erricson cycle
E. Brayton cycle
Highest pressure encountered in a refrigeration system should be________________?
A. critical pressure of refrigerant
B. much below critical pressure
C. much above critical pressure
D. near critical pressure
E. there is no such restriction
Clapeyron equation is a relation between___________________?
A. temperature, pressure and enthalpy
B. specific volume and enthalpy
C. temperature and enthalpy
D. temperature, pressure, and specil volume
E. temperature, pressure, specific volur and’enthalpy
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