Steam Nozzles and Turbines - Data Intensity 2 | Multiple Questions and Answers

16.	De-Laval turbines are mostly used

	A.	where low speeds are required
	B.	for small power purposes and low speeds
	C.	for large power purposes
	D.	for small power purposes and high speeds

17.	The reheat factor depends upon

	A.	initial pressure and superheat
	B.	exit pressure
	C.	turbine stage efficiency
	D.	all of these

18.	In an impulse turbine

	A.	the steam is expanded in nozzles only and there is a pressure drop and heat drop
	B.	the steam is expanded both in fixed and moving blades continuously
	C.	the steam is expanded in moving blades only
	D.	the pressure and temperature of steam remains constant

19.	A nozzle is said to be a divergent nozzle

	A.	when the cross-section of the nozzle increases continuously from entrance to exit
	B.	when the cross-section of the nozzle decreases continuously from entrance to exit
	C.	when the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
	D.	none of the above