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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Equal to
Twice
Four times
Three times

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Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam, as it flows over the blades in reaction turbine, represents

Isothermal process
Free expansion process
Throttling process
Isentropic process

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Steam Boilers, Engines, Nozzles and Turbines
The variation of steam pressure in the nozzle depends upon

All of these
Velocity of steam
Dryness fraction of steam
Specific volume of steam

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Steam Boilers, Engines, Nozzles and Turbines
Proximate analysis of fuel is determination of percentage of

Fixed carbon, ash, volatile matter, moisture
Carbon, hydrogen, nitrogen, sulphur, moisture
Lower calorific value
Higher calorific value

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Steam Boilers, Engines, Nozzles and Turbines
The steam temperature with increase in load in case of a boiler fitted with radiation superheater

Increases
First increases and then decreases
Remain unaffected
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
The pressure at which latent heat of vaporisation of water is zero, is

100 kg/cm²
Below atmospheric pressure
1 kg/cm²
225.6 kg/cm²

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