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

To provide simple harmonic motion to the D-slide valve
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To provide reciprocating motion to the slide valve
To convert reciprocating motion of the piston into rotary motion of the crank

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Steam Boilers, Engines, Nozzles and Turbines
For water, at pressures below atmospheric;

Melting point rises slightly and boiling point drops markedly
Melting point drops slightly and boiling point drops slightly
Melting point drops slightly and boiling point drops markedly
Melting point rises markedly and boiling point drops markedly

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Steam Boilers, Engines, Nozzles and Turbines
A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

Supplied by same manufacturer loose and assembled at site
Supplied mounted on a single base
Purchased from several parties and packed together at site
Packaged boiler does not exist

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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
Two different makes of boilers operating under the same operating conditions
The two different boilers of the same make

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