## Refrigeration and Air-conditioning Miscellaneous

#### Refrigeration and Air-conditioning

1. For air with a relative humidity of 80%

1. ##### Correct Option: B

1. For air at a given temperature, as the relative humidity is increased isothermally,

1. DBT = DBT2
DBT →
φ ↑, Twb ↓
Relative humidity is increased isothermally.

##### Correct Option: A

DBT = DBT2
DBT →
φ ↑, Twb ↓
Relative humidity is increased isothermally.

1. If moist air is cooled by sensible heat removal, which of the following is true?

1. Sensible cooling process

##### Correct Option: D

Sensible cooling process

1. Atmospheric air from 40°C and 60 percent relative humidity can be brought to 20°C and 60 percent relative humidity by

1. Cooling and dehumidification process,

##### Correct Option: A

Cooling and dehumidification process,

1. A reversed Carnot cycle refrigerator maintains a temperature of –5°C. The ambient air temperature is 35°C. The heat gained by the refrigerator at a continuous rate is 2.5 kJ/s. The power (in watt) required to pump this heat out continuously is _______

1.  Q1 = Q2 268 308

 Q2 = 2.5 × 308 [Q1 = 2.5] 268

Q2 = 2.873 kW
w = Q2 – Q1 = 0.373 kw = 373.13 Watt.

##### Correct Option: A

 Q1 = Q2 268 308

 Q2 = 2.5 × 308 [Q1 = 2.5] 268

Q2 = 2.873 kW
w = Q2 – Q1 = 0.373 kw = 373.13 Watt.