Steam Boilers, Engines, Nozzles and Turbines
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

Low pressure turbine
Back pressure turbine
Pass out turbine
Impulse turbine

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Steam Boilers, Engines, Nozzles and Turbines
The function of a piston in a steam engine is

To guide motion of the piston rod and to prevent it from bending
None of these
To transfer motion from the piston to the cross-head
To convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment

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