Q. Which of the following statement is correct?

View solution

Q. The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ number of stages are required.

View solution

Q. If the critical pressure ratio for steam is 0.546, then the steam is initially

View solution

Q. Which of the following statement is wrong?

View solution

Q. Steam turbines may be classified according to

View solution

Q. The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as

View solution

Q. In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

View solution

Q. In an impulse turbine, steam expands

View solution

Q. In a nozzle, the effect of supersaturation is to increase the dryness fraction of steam.

View solution

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

View solution

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

View solution

Q. 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.

View solution

Q. The friction present between the steam and the nozzle surfaces reduces the heat drop by

View solution

Q. An impulse turbine as compared to a reaction turbine, for a given power has __________ row of blades.

View solution

Q. In pressure compounding of an impulse turbine, the total pressure drop of the steam does not take place in the first nozzle ring, but is divided equally among all the nozzle rings.

View solution

Q. When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

View solution

Q. In an ideal impulse turbine, the

View solution

Q. During flow through a nozzle, no heat is supplied or rejected by the steam.

View solution

Q. In a reaction turbine, when steam flows through the moving blades,

View solution