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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

Equal
None of these
Less
More

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Steam Boilers, Engines, Nozzles and Turbines
Bomb calorimeter is used to determine

Lower calorific value at constant pressure
Lower calorific value at constant volume
Higher calorific value at constant volume
Higher calorific value at constant pressure

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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

282 kW
260 kW
296 kW
302 kW

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)

V = 44.72 hd K
V = 44.72 K hd
V = 44.72 K hd
V = 44.72 K hd

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Steam Boilers, Engines, Nozzles and Turbines
The working pressure range for a LaMont boiler is

1 to 15 MN/m²
2.5 to 15 MN/m²
3.5 to 20 MN/m²
0.5 to 10 MN/m²

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Steam Boilers, Engines, Nozzles and Turbines
At which pressure the properties of water and steam become identical

100 kg/cm²
1 kg/cm²
225.6 kg/cm²
0.1 kg/cm²

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