Category: Refrigeration and Air Conditioning

A. after passing through the condenser
B. before passing through the condenser
C. after passing through the expansion or thiottle valve
D. before entering the expansion valve
E. before entering the compressor

A. halide torch which on detection produces greenish flame lighting
B. sulphur sticks which on detection gives white smoke
C. using reagents
D. smelling
E. sensing reduction in pressure

A. compression
B. direct
C. indirect
D. absorption
E. none of the above

A. of cooling medium
B. of freezing zone
C. of evaporator
D. at which refrigerant gas becomes liquid
E. condensing temperature of ice

A. lithium bromide used in vapour absorption cycle is nonvolatile
B. lithium bromide plant can’t operate below 0°C
C. a separator is used in lithium bromide plant to remove the unwanted water vapour by condensing
D. concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator
E. weak solution in liquid heat exchanger gives up heat to the strong solution

A. the standard unit used in refrigeration problems
B. the cooling effect produced by melting 1 ton of ice
C. the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours
D. the refrigeration effect to produce 1 ton of ice at NTP conditions
E. the refrigeration effect to produce 1 ton of ice in 1 hour time

A. same
B. more
C. less
D. more/less depending on rating
E. unpredictable

A. collect liquid refrigerant and prevent it from going to compressor
B. detect liquid in vapour
C. superheat the vapour
D. collect vapours
E. increase refrigeration effect

A. 1.25
B. 0.8
C. 0.5
D. 0.25
E. none of the above

A. ammonia vapour goes into solution
B. ammonia vapour is driven out of solution
C. lithium bromide mixes with ammonia
D. weak solution mixes with strong solution
E. lithium bromide is driven out of solution