Steam Nozzles and Turbines Questions

• The nozzle efficiency is the ratio of
• The ratio of the cumulative heat drop to the isentropic heat drop is called reheat factor.
• When the nozzle operates with the maximum mass flow, the nozzle is said to be
• In a De-Laval impulse turbine, the nozzle is kept very close to the blades.
• Reheating of steam in a turbine
• In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
• Rateau turbine is
• The purpose of governing in steam turbines is to
• When the cross-section of a nozzle increases continuously from entrance to exit, it is called a
• A steam nozzle converts
• The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 α, where α is the nozzle exit flow angle, if the
• The density of supersaturated steam is about __________ that of the ordinary saturated vapour at the corresponding pressure.
• The flow of steam is super-sonic
• Curtis turbine is a
• The diagram efficiency is the ratio of
• The velocity of steam, in reaction turbines, is increased in the fixed blades as well as in moving blades.
• In order to reduce the rotor speed of an impulse turbine, the method employed is
• De-Laval turbines are mostly used
• Blading efficiency is also known as
• The Rankine efficiency depends upon total useful heat drop and total isentropic heat drop.