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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

10 to 15%
15 to 25%
25 to 40%
40 to 60%

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler has __________ internal flue tubes.

Two
Three
One
Four

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Steam Boilers, Engines, Nozzles and Turbines
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

296 kW
302 kW
260 kW
282 kW

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Steam Boilers, Engines, Nozzles and Turbines
Cochran boiler is a

Vertical fire tube boiler
Vertical water tube boiler
Horizontal fire tube boiler
Horizontal water tube boiler

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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

Maximum
Depends on temperature also
Minimum
Zero

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

Fusible plug
Safety valve
Blow off cock
Stop valve

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