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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The diameter of a cylindrical shell of a Scotch marine boiler varies from

1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of well maintained boiler will be of the order

0.75
0.5
0.9
0.4

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

Forced steam jet draught
Induced steam jet draught
Chimney draught
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Fire tube boilers are

Externally fired
None of these
Internally fired
Internally as well as externally fired

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The length of Cornish boiler varies from

3 to 5 m
7 to 9 m
2 to 4.5 m
5 to 7.5 m

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