Question: In Rankine cycle the work output from the turbine is given by__________?

• 1. change of internal energy between inlet and outlet
• 2. change of enthaply between inlet and outlet
• 3. change of entropy between inlet and outlet
• 4. change of temperature between inlet and outlet

Question: Rankine efficiency of a steam power plant____________?

• 1. improves in summer as compared to that in winter
• 2. improves in winter as compared to that in summer
• 3. is unaffected by climatic conditions
• 4. none of the above

Question: Rankine cycle operating on low pressure limit of p1 an 1 high pressure limit of p2__________?

• 1. has higher the renal efficiency than the carnot cycle operating between same pressure limits
• 2. has lower the”nal efficiency than carnot cycle operating between same pressure limit?
• 3. has same thermal efficiency as carnot cycle operating between same pressure limits
• 4. may be more or less depending upon the magnitude of p1 and p2

Question: Rankine cycle efficiency of a good steam power plant may be in the range of____________?

• 1. 15 to 20 per cent
• 2. 35 to 45 per cent
• 3. 70 to 80 per cent
• 4. 90 to 95 per ceut

Question: The overall efficiency of thermal power plant is equal to____________?

• 1. Rankine cycle efficiency
• 2. Carnot cycle efficiency
• 3. Regenerative cycle efficiency
• 4. Boiler efficiency x turbine efficiency x generator efficiency

Question: The energy radiated by sun on a bright sunny day is approximately______________?

• 1. 700 W/m2
• 2. 800 W/m2
• 3. 1 kW/m2
• 4. 2 kW/m2

Question: Solar thermal power generation can be achieved by_______________?

• 1. using focusing collector or heliostates
• 2. using flat plate collectors
• 3. using a solar pond
• 4. any of the above system

Question: In fuel cell, the ___________ energy is converted into electrical energy?

• 1. mechanical
• 2. chemical
• 3. heat
• 4. sound

Question: The main source of production of biogas is__________________?

• 1. human waste
• 2. wet cow dung
• 3. wet livestock waste
• 4. all above

Question: The proper indication of incomplete combustion is_______________?

• 1. high CO content in flue gases at exit
• 2. high CO2 content in flue gases at exit
• 3. high temperature of flue gases
• 4. the smoking exhaust from chimney