Steam Nozzles and Turbines - Data Intensity 4 | Multiple Questions and Answers

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Steam Nozzles and Turbines - Data Intensity 4 Multiple Questions and Answers.

21.	The effect of bleeding is that

	A.	it increases the thermodynamic efficiency of the turbine
	B.	boiler is supplied with hot water
	C.	it decreases the power developed by the turbine
	D.	all of the above

22.	The expansion of steam, as it flows over the blades in reaction turbine, represents

	A.	isothermal process
	B.	isentropic process
	C.	throttling process
	D.	free-expansion process

23.	The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and ? = Nozzle angle)

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

24.	The velocity of whirl at outlet for an axial discharge turbine is

	A.	minimum
	B.	maximum
	C.	zero
	D.	none of above

25.	In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is ____ the relative velocity of steam at inlet tip of the blade.

	A.	equal to
	B.	less than
	C.	greater than
	D.	none of above

Read More :

» Steam Nozzles and Turbines - Data Intensity 1

» Steam Nozzles and Turbines - Data Intensity 2

» Steam Nozzles and Turbines - Data Intensity 3

» Steam Nozzles and Turbines - Data Intensity 4

Date to Date Current Affairs 2022

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