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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

188 m/s
450 m/s
900 m/s
79 m/s

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Steam Boilers, Engines, Nozzles and Turbines
The coal requirement per kW hour generation in the thermal power plant is of the order of

0.6 to 0.8 kg
0.1 to 0.2 kg
1.0 to 1.5 kg
0.2 to 0.4 kg

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Externally fired boiler
Internally fired boiler
Natural circulation boiler
Forced circulation boiler

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Steam Boilers, Engines, Nozzles and Turbines
The shell diameter and length of locomotive boiler are

1.5 m, 6 m
1.5 m, 4 m
1 m, 4 m
2 m, 4 m

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is of the following type

Horizontal
Multi tubular
Internally fired
All of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about the function of furnace?

To provide proper conditions for continuous complete combustion
Separate ash from coal
Maintain heat supply to prepare and ignite the incoming fuel
Mix fuel with air and ignite

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