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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
An economiser is installed in a boiler primarily to

Reduce fuel consumption
Superheat the steam
Increase steam pressure
All of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
Gusset stays in a boiler are provided to

Prevent the bulging of flat surfaces
Prevent leakage of hot flue gases
Avoid explosion in furnace
Support furnace freely from top

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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.

Three times
Equal to
Four times
Twice

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Steam Boilers, Engines, Nozzles and Turbines
The effect of bleeding is that

It decreases the power developed by the turbine
Boiler is supplied with hot water
It increases the thermodynamic efficiency of the turbine
All of these

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

Throttling process
Isentropic process
Free expansion process
Isothermal process

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Steam Boilers, Engines, Nozzles and Turbines
A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called

None of these
Blow off cock
Stop valve
Superheater

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