Related Questions

In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is
A Reversed Carnot cycle
B Reversed Joule cycle
C Reversed Brayton cycle
D Reversed Otto cycle
A garments factory employs 3 categories of workers K, M and N. The efficiency of the 3 categories of workers to do a specific task is in the ratio of 3 : 5 : 6 respectively and the factory employs 15 of category K, 12 of category M and 3 of category N. If the total wages paid to the entire group of 30 workers is Tk. 492 per hour, what will be the wages earned by a category N worker for an 8-hour day?
A Tk. 144
B Tk. 72
C Tk. 192
D Tk. 576
Q.(1-4): Answer the questions on the basis of the information given below. * F,G and H are insurance companies , Q,R,S and T are private detectives .Each detective works for at least one of the insurance companies. * Q always works for F and at least one of the other companies. Some of the time G employs only one of these detectives,' the rest of the time it employs exactly two of them. *F and H each employ exactly two of these detectives all the time. If R works for H only, and if S works for G and H only, T works for--
A F only
B G only
C H only
D both F and G
Aqua ammonia is used as refrigerant in the following type of refrigeration system
A Compression
B Direct
C Indirect
D Absorption
Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?
A Freon
B Liquid sulphur dioxide
C Methyl chloride
D Ammonia
In a refrigeration cycle, the flow of refrigerant is controlled by
A Compressor
B Condenser
C Evaporator
D Expansion valve
During a refrigeration cycle, heat is rejected by the refrigerant in a
A Compressor
B Condenser
C Evaporator
D Expansion valve
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
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
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

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