Related Questions

The leaks in a refrigeration system using Freon are detected by
A Halide torch which on detection produces greenish flame lighting
B Sulphur sticks which on detection gives white smoke
C Using reagents
D Smelling
The leakage in a refrigeration system using ammonia is detected by
A Halide torch
B Sulphur sticks
C Soap and water
D All of these
Ammonia leakage in the refrigeration system is detected by
A Sulphur stick, which on detection gives white smoke
B Using chemical reagents
C Its smell
D Soap solution
Moisture in Freon refrigeration system causes
A Ineffective refrigeration
B High power consumption
C Freezing automatic regulating valve
D Corrosion of whole system
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to
A Bright green
B Yellow
C Red
D Orange
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
The material of pipe lines for a system using Freon as a refrigerant should be
A Brass
B Copper
C Steel
D Aluminium
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

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