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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on volume basis is

0.21
0.3
0.23
0.4

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Steam Boilers, Engines, Nozzles and Turbines
In locomotive boiler, maximum steam pressure is limited to

10 kg/cm²
1 kg/cm²
18 kg/cm²
5 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
The cylinder condensation or missing quantity may be reduced by

The efficient steam jacketing of the cylinder walls
All of these
Superheating the steam supplied to the engine cylinder
Keeping the expansion ratio small in each cylinder

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in, a Coarran and Scottish marine boiler are

Horizontal
Both horizontal and vertical
Inclined
Vertical

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Steam Boilers, Engines, Nozzles and Turbines
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

30 to 40%
20 to 30%
15 to 20%
10 to 15%

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Steam Boilers, Engines, Nozzles and Turbines
The relative heat absorption for successively added equal areas of boiler convection heating surfaces

Remain unaffected
First increases and then decreases
Decreases
Increases

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