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Higher Study | Power Engineering | Steam Turbine

In steam turbine terminology, diaphragm refers to
Statement (I) : When a bluff body moves at supersonic speed in still air, an attached shock wave is produced at its nose causing the flow to be subsonic behind the shock plane. Statement (II) : A normal shock always transforms supersonic flow into subsonic flow causing increase in pressure, temperature and entropy.
The mass flow through a convergent – divergent nozzle is maximum when the pressure at:
When a converging-diverging nozzle is operated at off-design conditions, a normal shock forms in the diverging portion. The nozzle can be assumed to be perfectly insulate from the surroundings. Then across the shock
When the pressure drop across a converging-diverging nozzle is different from the design value for isentropic flow, which of the following is possible?
In order that no shock wave develops when the flow is taking place through a converging-diverging tube, Mach number at exit should be:
A convergent-divergent nozzle is said to be choked when:
Across the normal shockwave: 1) Stagnation pressure decreases whereas stagnation temperature remains constant 2) Mach number before the shockwave is always greater than one and after the shockwave, the Mach number need not be less than one 3) Across the shockwave there is a rise in pressure and temperature 4) The product of Mach number downstream of normal shockwave and upstream of normal shockwaves always one Which of the above statements are correct?
In a convergent divergent nozzle, the velocity at throat of nozzle is given by Where p­1 = initial entry pressure, v1 = initial entry specific volume and n = isentropic index of expansion.
Considering the flow of steam through a Convergent-Divergent nozzle under real conditions, where supersaturation occurs, the difference between the saturation temperature corresponding to the pressure and the supersaturated temperature is defined as the degree of 
What is the maximum moisture content in a steam turbine exhaust?
Which component of a gas turbine consumes maximum power?
The ratio of the work actually developed by the turbine expanding hot power gas through a given pressure range to that would be yielded for ideal expansion conditions. The given statement relates to which of the following terms?
Without reducing the fluid flow rate, the speed of an impulse steam turbine can be brought down to practical limits by which of the following methods? (1) Large flywheel (2) Centrifugal governor (3) Velocity compounding (4) Steam bleeding
Which of the following are the effects of nozzle friction? 1. Enthalpy drop decreases 2. Exit velocity reduces 3. Decreases in the specific volume 4. Decrease in mass flow rate Select correct code.
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