After passing through a convergent-divergent nozzle the temperature of air will:

• Increase

• Decrease

• Remains the same

• None of these

By increasing the temperature source of Carnot cycle, which of the following will not be affected?

• Efficiency

• Work

• Heat added

• Heat rejected

By decreasing the temperature sink of Carnot cycle, which of the following will not be affected?

• Efficiency

• Work

• Heat added

• Heat rejected

By superheating the refrigerant in vapor compression cycle with useful cooling, which of the following will increase? (use per unit mass analysis)

• Condenser pressure

• Evaporator pressure

• Quality after expansion

• Heat rejected from condenser

By superheating the refrigerant in vapor compression cycle with useful cooling, which of the following will decrease? (use per unit mass analysis)

• Refrigerated effect

• COP

• Compressor power

• Mass flow rate

By superheating the refrigerant in vapor compression cycle without useful cooling, which of the following will decrease? (use per unit mass analysis)

• Heat rejected

• COP

• Compressor power

• Specific volume at suction

By superheating the refrigerant in vapor compression cycle without useful cooling, which of the following will increase? (use per unit mass analysis)

• Heat rejected

• COP

• Compressor power

• Specific volume at suction

By superheating the refrigerant in vapor compression cycle without useful cooling, which of the following will not be affected? (use per unit mass analysis)

• Refrigerated effect

• COP

• Compressor power

• Mass flow rate

By sub-cooling the refrigerant in vapor compression cycle at condenser exit, which of the following will increase? (use per unit mass analysis)

• Refrigerated effect

• Specific volume at suction

• Compressor power

• Mass flow rate

By sub-cooling the refrigerant in vapor compression cycle at condenser exit, which of the following will decrease? (use per unit mass analysis)

• Refrigerated effect

• Specific volume at suction

• Compressor power

• Mass flow rate