- (A) constant pressure lines
- (B) constant temperature lines
- (C) constant total heat lines
- (D) constant entropy lines
- (E) constant volume lines
Mechanical Engineering Mcqs
- (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) reduce compressor overheating
- (B) reduce compressor discharge temperature
- (C) increase cooling effect
- (D) ensure that only liquid and not the vapour enters the expansion (throttling) valve
- (E) none of the above
- (A) more
- (B) less
- (C) same
- (D) more for small capacity and less for high capacity
- (E) less for small capacity and more for high capacity
