Steam Nozzles and Turbines - Data Intensity 1 | Multiple Questions and Answers

11.	The efficiency of reaction turbine is maximum when (where ? = Angle made by the absolute velocity (V) at inlet)

	A.	Vb = 0.5 V cos ?
	B.	Vb = V cos ?
	C.	Vb = 0.5 V2 cos ?
	D.	Vb = V2 cos ?

12.	A regenerative steam cycle renders

	A.	increased work output per unit mass of steam
	B.	decreased work output per unit mass of steam
	C.	increased thermal efficiency
	D.	decreased work output per unit mass of steam as well as increased thermal efficiency

13.	De-Laval turbine is a

	A.	single rotor impulse turbine
	B.	multi-rotor impulse turbine
	C.	impulse reaction turbine
	D.	none of these

14.	The reheat factor is the ratio of the

	A.	cumulative heat drop to the isentropic heat drop
	B.	isentropic heat drop to the heat supplied
	C.	total useful heat drop to the total isentropic heat drop
	D.	none of the above