Refrigeration and Air Conditioning

A. bigger cabinet should be used
B. smaller cabinet should be used
C. perfectly tight vapour seal should be used
D. refrigerant with lower evaporation temperature should be used
E. refrigerant with high boiling point must be used

A. it permits higher speeds to be used
B. it permits complete evaporation in the evaporator
C. it results in high volumetirc and mechanical efficiency
D. all of the above
E. none of the above

A. bigger
B. smaller
C. equal
D. smaller/bigger depending on capacity
E. unpredictable

A. increases COP
B. decreases COF
C. COP remains unaltered
D. other factors decide COP
E. unperdictable

A. heat of compression
B. work done by compressor
C. enthalpy increase in compressor
D. all of the above
E. none of the above

A. pressure lines
B. temperature lines
C. total heat lines
D. entropy lines
E. volume lines

A. 0.1 to 0.5 h.p. per ton of refrigeration
B. 0.5 to 0.8 h.p. per ton of refrigeration
C. 1 to 2 h.p. per ton of refrigeration
D. 2 to 5 h.p. per ton of refrigeration
E. 5 to 10 h.p. per ton refrigeration

A. condenser
B. evaporator
C. absorber
D. condenser and absorber
E. condenser, absorber and separator (rectifier)

A. increase
B. decrease
C. may increase or decrease depending on the type of refrigerant used
D. remain unaffected
E. unpredictable

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