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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.

Four times
Equal to
Three times
Twice

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Steam Boilers, Engines, Nozzles and Turbines
At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is

Zero
Depends on temperature also
Minimum
Maximum

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of total useful heat drop to the total isentropic heat drop, is called

Internal efficiency
None of these
Stage efficiency
Rankine efficiency

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Steam Boilers, Engines, Nozzles and Turbines
A safety valve in a locomotive starts leaking. The leaking medium will be

Water
Wet steam
Super heated steam
Dry steam

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Steam Boilers, Engines, Nozzles and Turbines
The draught may be produced by a

A steam jet
Chimney
All of these
Mechanical fan

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Steam Boilers, Engines, Nozzles and Turbines
Which device is used in thermal power plants to reduce level of pollution?

Smoke meter
Precipitator
Chimney
Induced draft fan

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