MCQs of Steam Turbine (Power Plant Engineering - 2171910)

Power Plant Engineering (2171910) MCQs

MCQs of Steam Turbine

Showing 11 to 20 out of 61 Questions

11.

The action of steam in a steam turbine is

(a)	static
(b)	dynamic
(c)	static and dynamic
(d)	neither static nor dynamic

12.

Which of the following statement is correct?

(a)	The efficiency of steam turbines is greater than steam engines
(b)	A flywheel is a must for steam turbine
(c)	The turbine blades do not change the direction of steam issuing from the nozzle
(d)	The pressure of steam, in reaction turbines, is increased in fixed blades as well as in moving blades

13.

When steam reaches turbine blades the type of force responsible for moving turbine blades are _____________.

(a)	Axial force
(b)	Shear force
(c)	Longitudinal force
(d)	None of the mentioned

14.

The turbine blades are

(a)	straight
(b)	circular
(c)	curved
(d)	all of these

15.

Impulse blades are in the shape of __________.

(a)	Rain drop
(b)	Circular
(c)	Half moon
(d)	None of the mentioned

16.

In an impulse turbine, steam expands

(a)	wholly in blades
(b)	wholly in nozzle
(c)	partly in the nozzle and partly in blades
(d)	none of these

17.

A turbine is said to have an axial discharge when the steam leaves the blade tip at __________ to the direction of the blade motion.

(a)	60°
(b)	90°
(c)	180°
(d)	270°

18.

In reaction turbines, the axial thrust is due to

(a)	pressure drop across the rotor
(b)	change in axial velocity
(c)	both pressure drop across the rotor and change in axial velocity
(d)	none of these

19.

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

(a)	minimum
(b)	maximum
(c)	zero
(d)	any of these

20.

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)	any of the mentioned

Showing 11 to 20 out of 61 Questions