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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.

Less
None of these
Equal
More

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Steam Boilers, Engines, Nozzles and Turbines
Steam turbines are used for

Electric power generation
Direct drive of fans, compressors, pumps
All of these
Large marine propulsion

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for gases is

0.582
0.577
0.546
0.528

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Steam Boilers, Engines, Nozzles and Turbines
The artificial draught is produced by

Both (A) and (B)
Centrifugal fan
Chimney
Steam jet

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Steam Boilers, Engines, Nozzles and Turbines
The diameters of fire tubes and superheater tubes in locomotive boiler are

47.5 mm, 130 mm
24.5 mm, 65 mm
65.5 mm, 210 mm
32.5 mm, 180 mm

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Steam Boilers, Engines, Nozzles and Turbines
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

Superheater
Blow off cock
Fusible plug
Stop valve

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