The index of performance of a refrigerating system is called
A.efficiency
B.effectiveness
C.coefficient of performance
D.drop in temperature
A.efficiency
B.effectiveness
C.coefficient of performance
D.drop in temperature
A.10 and 15%
B.30 and 35%
C.90 and 95 %
D.95 to 99%
A.zenth angle
B.declination angle
C.hour angle
D.iatitude angle
A.80%
B.94%
C.99%
D.85%
A.receives energy at a high level of temperature
B.converts a portion of the energy received into work
C.discharges portion of the energy received to a heat sink at a low level of temperature
D.all of the above
A.40 kg m-2 year-1
B.40 kg m-2 month-1
C.40 kg m-2 day-1
D.40 kg m-2 hour-1
A.the latitude angle
B.the hour angle
C.the solar altitude angle
D.none of the above
A.more than that for waves in red portion of the spectrum
B.less than that for waves in red portion of the spectrum
C.equal to that for waves in red portion of the spectrum
D.none of the above