Steam Boilers, Engines, Nozzles and Turbines
The function of a piston rod is

To transfer motion from the piston to the cross head
To convert heat energy of the steam into mechanical work
To guide motion of the piston rod and to prevent it from bending
To exhaust steam from the cylinder at proper moment

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

Any type of boilers operating under any conditions
The given boiler with the model
The two different boilers of the same make
Two different makes of boilers operating under the same operating conditions

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