1. What is the effect of increase in regeneration on steam rate?
a) decreases
b) remains same
c) increases
d) none of the mentioned
Explanation: More steam has to circulate per hour to produce unit shaft output.
2. What is the relation between efficiencies of Carnot cycle & the ideal Sterling Engine?
a) Both are equal
b) Carnot cycle efficiency > Efficiency of Sterling Engine
c) Carnot cycle efficiency < Efficiency of Sterling Engine
d) No relation between Carnot cycle efficiency & efficiency of Sterling Engine
Explanation: All the heat is added reversibly & all the heat is rejected reversibly. Hence, the efficiency of Carnot Cycle is equal to efficiency of Sterling Engine
3. Heat transfer taking place in the turbine is?
a) from the vapour to the condensate
b) from the condensate to the vapour
c) no heat transfer
d) none of the mentioned
Explanation: Following the Stirling cycle, in the ideal regenerative cycle the condensate after leaving the pump circulates around the turbine casing so that heat is transferred from the vapour expanding in the turbine to the condensate circulating around it
4. The heat transfer taking place in the turbine is?
a) irreversible
b) reversible
c) irreversible & reversible
d) none of the mentioned
Explanation: At each point the temperature of the vapour is only infinitesimally higher than the temperature of the liquid.
5. The relation between the steam rate of ideal regenerative cycle & steam rate of rankine cycle is?
a) steam rate of ideal regenerative cycle = steam rate of rankine cycle
b) steam rate of ideal regenerative cycle > steam rate of rankine cycle
c) steam rate of ideal regenerative cycle < steam rate of rankine cycle
d) no relation
Explanation: Net Work output of the ideal regenerative cycle is less & hence, its steam rate will be more.
6. In an ideal regenerative cycle, heat input is at?
a) Boiler
b) Turbine
c) Condenser
d) Pump
Explanation: In a regenerative cycle, the heat input is at Boiler (from the flow chart of an ideal regenerative cycle).
7. In an ideal regenerative cycle, heat output is at?
a) Boiler
b) Turbine
c) Condenser
d) Pump
Explanation: In a regenerative cycle, the heat output is at the Condenser (from the flow chart of an ideal regenerative cycle)
8. In an ideal regenerative cycle, the work output is at?
a) Boiler
b) Turbine
c) Condenser
d) Pump
Explanation: In a regenerative cycle, the work output is at the Condenser (from the flow chart of an ideal regenerative cycle).
9. In an ideal regenerative cycle, the work input is at?
a) Boiler
b) Turbine
c) Condenser
d) Pump
Explanation: In a regenerative cycle, the work input is at the Condenser (from the flow chart of an ideal regenerative cycle).
10. What effect does the heating of feedwater by steam ‘bled’ from the turbine has on the Rankine Cycle?
a) it rankinises the Rankine Cycle
b) it carnotinises the Rankine Cycle
c) it reheats the Rankine Cycle
d) none of the mentioned
Explanation: The heating of feedwater by steam ‘bled’ from the turbine, known as regeneration, carnotinises the Rankine cycle