Related Questions

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
A Kinematic viscosity
B Work
C Temperature
D None of these
If a man cycles at 10 km/hr, then he arrives at a certain place at 1 pm. If he cycles at 15 km/hr, he will arrive at the same place at 11 am. At what speed must he cycles to get there at noon?
A 11 km/hr
B 12 km / hr
C 13 km / hr
D 14 km / hr
COP-26 কোথায় অনুষ্ঠিত হবে ? (Where will COP-26 be held?)
A Canada
B France
C Netherland
D Scottland
COP-26 এ COP মানে কী?
A কনফারেন্স অব দ্য প্যারিস
B কনফারেন্স অব দ্য পাওয়ার
C কনফারেন্স অব দ্য পার্টিস
D কনফারেন্স অব দ্য প্রটোকল
Out of the following refrigeration cycles, which one has maximum COP?
A Air cycle
B Carnot cycle
C Ordinary vapor compression cycle
D Vapor compression with a reversible expansion engine
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
If a man cycles at 10 km/hr , then he arrives at a certain place at 1 pm . If he cycles at 15km/hr, arrive at the same place at 11am . At what speed must he cycels to get there at noon ?
A 11km/hr
B 12km/hr
C 13km/hr
D 14km/hr
Co-efficient of Performance (COP) of a refrigerator is the ratio of the
A Work required to refrigeration obtained
B Refrigeration obtained to the work required
C Lower to higher temperature
D Higher to lower temperature
The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is
A Less
B More
C Same
D Dependent on climatic conditions
Which of the following has the minimum value of COP for a given refrigeration effect?
A Reverse Carnot cycle
B Ordinary vapour-compression cycle
C Vapour-compression process with a reversible expansion engine
D Air refrigeration cycle

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