21. The amount of air which is supplied for complete combustion is called A. primary air B. secondary air C. tertiary air D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
22. Reheat factor is the ratio of A. isentropic heat drop to useful heat drop B. adiabatic heat drop to isentropic heat drop C. cumulative actual enthalpy drop for the stages to total is isentropic enthalpy heat drop D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
23. Curtis turbine is A. reaction steam turbine B. pressure velocity compounded steam turbine C. pressure compounded impulse steam turbine D. velocity compounded impulse steam turbine Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
24. Mercury is a choice with steam in binary vapour cycle because it has A. higher critical temperature and pressure B. higher saturation temperature than other fluids C. relatively low vapourisation pressure D. all above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
25. In regenerative cycle feed water is heated by A. exhaust gases B. heaters C. draining steam from the turbine D. all above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
26. The energy radiated by sun on a bright sunny day is approximately A. 700 W/m2 B. 800 W/m2 C. 1 kW/m2 D. 2 kW/m2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
27. The average ash content in Indian co als is about A. 5% B. 10% C. 15% D. 20% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
28. The main source of production of biogas is A. human waste B. wet cow dung C. wet livestock waste D. all above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
29. Deaerative heating is done to A. Heat the water B. Heat the air in the water C. Remove dissolved gases in the water D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
30. Regenerative cycle thermal efficiency A. is always greater than simple Rankine thermal efficiency B. is greater than simple Rankine cycle thermal efficiency only when steam is bled at particu-lar pressure C. is same as simple Rankine cycle thermal efficiency D. is always less than simple Rankine cycle thermal efficiency Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board