Refrigeration and Air Conditioning

A. non-toxic
B. non-inflammable
C. toxic and non-inflammable
D. highly toxic and inflammable
E. none of the above

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

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. 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