In a De-Laval turbine, steam with absolute velocity of 950 m/s is supplied through a nozzle. The mean blade velocity is 300 m/s. If the turbine is working at its maximum possible efficiency, determine the work done per kg of steam.

In a De-Laval turbine, steam with absolute velocity of 950 m/s is supp

1.	In a De-Laval turbine, steam with absolute velocity of 950 m/s is supplied through a nozzle. The mean blade velocity is 300 m/s. If the turbine is working at its maximum possible efficiency, determine the work done per kg of steam.
A.	180 kJ
B.	200 kJ
C.	1705 kJ
D.	1805 kJ
Answer» B. 200 kJ

Discussion

No Comment Found

Related MCQs

In an impulse turbine, the axial force on the blades is zero if _____
Work done per kg of steam in an impulse turbine when the blade speed ratio ( ) is equal to one is _____
Which of the following statement about the work done per kg of steam in impulse turbines is TRUE, when the blade speed ratio is equals ( frac{cos }{2} )? ( is the nozzle angle)
Which of the following statement about efficiency of impulse turbines is TRUE, when the blade speed ratio is made equal to half of cosine of the nozzle angle?
Which of the following statement regarding work done in impulse turbines is TRUE, if the blade speed ratio is equal to zero?
In a single stage impulse turbine, the exit velocity of the steam is 90 m/s at an angle of 45 from the tangential direction. The mean blade speed is 200 m/s. The blades are equiangular and velocity coefficient of the blades is 0.8. Determine the velocity of steam leaving the nozzles.
In a single stage impulse turbine nozzle angle is 20 and the mean blade speed is 300 m/s. Steam leaves the nozzle at a velocity of 700 m/s. Determine the exit velocity of the steam if the turbine blades are equiangular and frictionless.
A simple impulse turbine has one ring of moving blades running at 400 m/s. The steam velocity leaving the nozzle is 1300 m/s. If the nozzle angle is 25 , determine the blade inlet angle.
In a simple impulse turbine, steam leaves nozzle at 1200 m/s. The mean blade speed and nozzle angle is 300 m/s and 20 respectively. The inlet and outlet blade angles are equal. The blades of the turbine are frictionless. Determine the stage efficiency if the nozzle efficiency is 85%.
In a single row impulse turbine, steam leaves the nozzle at 600 m/s. The nozzle angle and the mean blade speed is 25 and 200 m/s. The blade velocity coefficient is 0.8. Determine the blade outlet angle if the steam leaves the turbine blades axially.

In a De-Laval turbine, steam with absolute velocity of 950 m/s is supplied through a nozzle. The mean blade velocity is 300 m/s. If the turbine is working at its maximum possible efficiency, determine the work done per kg of steam.

Discussion

No Comment Found

Related MCQs

Reply to Comment