19 Questions
What is the primary function of steam turbines?
Convert heat energy to mechanical energy
In which direction does the steam flow in most steam turbines?
Axial direction (parallel to the shaft)
What is the main difference between impulse and reaction turbines?
The method of pressure drop and velocity increase of the steam
What do the stationary passages of an impulse turbine consist of?
Stationary nozzles
What happens to the velocity of steam as it moves through the impulse rotors?
It decreases while the pressure remains constant
What happens to the velocity of steam as it moves into the reaction rotors?
It increases while the pressure reduces in each moving rotor wheel
What important role does the condenser serve in a steam power plant?
All of the above
When steam is exhausted from the low-pressure turbine to a condenser, what transformation occurs?
Steam transforms back into water (condensate)
What happens to the energy of the steam as it moves into the reaction rotors?
It is taken advantage of at reduced pressure and increased volume
What is the purpose of a boiler feed pump in a steam power plant?
To raise the pressure above the boiler pressure
What is the function of the stationary nozzles in a steam turbine?
To change the direction of the steam onto the rotor blades
In a reaction turbine, how does the steam transmit a reaction force to the blades?
By causing a back thrust on the blading
What is momentum in the context of steam turbines?
The product of mass times velocity
How are impulse blades designed when fitted into a blade wheel?
To minimize steam pressure drop as the steam passes through
What is the function of sealing glands in a steam turbine?
To minimize leakage of steam from the wheel case along the shaft
What material are the blades made of in a steam turbine?
Stainless steel
What does the rotor consist of in a steam turbine?
Forged steel disc
How are bearings designed in a steam turbine for easy removal without disturbing other parts?
They have a split sleeve design
The top half of the casing in a steam turbine can be removed without disturbing other parts or piping connections. True or False?
True
Test your knowledge about steam turbines and their basic functioning. Learn about the conversion of heat energy to mechanical energy and the difference between impulse and reaction steam turbines.
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