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ME Set-1
Heat Transfer Refrigeration and Air Conditioning
170

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

170) The relative humidity lines on a psychrometric chart are

vertical and uniformly spaced

horizontal and uniformly spaced

horizontal and non-uniformly spaced

curved lines

Answer is:

curved lines

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

171) The C.O.P. of a heat pump working on a reversed Carnot cycle is

(T1)/(T2-T1)

(T2-T1)/(T1)

(T1-T2)/(T1)

(T2)/(T2-T1)

Answer is:

(T2)/(T2-T1)

172) A vapour absorption refrigeration system

gives noisy operation

gives quiet operation

requires little power consumption

cools below 0 Degree Centigrade

Answer is:

gives quiet operation

173) The rato of energy transferred by convection to that by conduction is called

Stanton number

Nusselt number

Biot number

Peclet number

Answer is:

Nusselt number

174) A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of

25 kJ/kg

50 kJ/kg

l00 kJ/kg

125 kJ/kg

Answer is:

50 kJ/kg

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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