Question: In regenerative cycle feed water is heated by_____________?

• 1. exhaust gases
• 2. heaters
• 3. draining steam from the turbine
• 4. all above

Question: The maximum percentage gain in Regenerative feed heating cycle thermal efficiency____________?

• 1. increases with number of feed heaters increasing
• 2. decreases with number of feed heaters increasing
• 3. remains same unaffected by number of feed heaters
• 4. none of the above

Question: In a regenerative feed heating cycle, the greatest economy is affected___________?

• 1. when steam is extracted from only one suitable point of steam turbine
• 2. when steam is extracted from several places in different stages of steam turbine
• 3. when steam is extracted only from the last stage of steam turbine
• 4. when steam is extracted only from the first stage of steam turbine

Question: In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating________________?

• 1. decreases with increase in Rankine cycle efficiency
• 2. increases with increase in Rankine cycle efficiency
• 3. is unaffected by increase in Rankine cycle efficiency
• 4. none of the above

Question: Regenerative cycle thermal efficiency_______________?

• 1. is always greater than simple Rankine thermal efficiency
• 2. is greater than simple Rankine cycle thermal efficiency only when steam is bled at particular pressure
• 3. is same as simple Rankine cycle thermal efficiency
• 4. is always less than simple Rankine cycle thermal efficiency

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