In a reaction turbine when the degree of reaction is zero, then there is

The expansion of steam in a nozzle follows

The effect of bleeding is that

The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂ = Pressure of steam at throat or critical pressure)

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

In an impulse reaction turbine, the pressure drops gradually and continuously over

If the critical pressure ratio for steam is 0.then the steam is initially

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

The effect of friction in the nozzle __________ dryness fraction of steam.

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

A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

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.

When the inlet pressure of steam is equal to the exit pressure, then

Which of the following statement is wrong?

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

In a Parson's turbine stage, blade velocity ism/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

The stage efficiency is the ratio of energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam.

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

For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet and exit respectively and β₁ and β₂ are the moving blade angles at entrance and exit respectively, then

Stage efficiency is also known as

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

A single stage impulse turbine with a diameter of 1.2 m runs atr.p.m. If the blade speed ratio is 0.then the inlet velocity of steam will be

In a De-Laval impulse turbine, the nozzle is kept very close to the blades.

The flow of steam is super-sonic

The pressure of steam at throat of a steam nozzle is called critical pressure.

For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.

Steam turbines may be classified according to

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

In areaction turbine stage, tangential component of absolute velocity at rotor inlet ism/s and the blade velocity ism/s. The power output in kW of steam will be