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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The critical pressure at which latent heat of vaporisation is zero is

100 kgf/ cm²
225.65 kgf/ cm²
273 kgf/ cm²
1 kgf/ cm²

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is not a boiler mounting?

Feed check valve
Blow off cock
Fusible plug
Economiser

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Steam Boilers, Engines, Nozzles and Turbines
The biggest size of thermal power unit operating in India is

500 MW
60 MW
100 MW
30 MW

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Steam Boilers, Engines, Nozzles and Turbines
Green coal, in order to be burnt, must be

Heated to its ignition point
Burnt as powder
Heated sufficiently
Burnt in excess air

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the volume at cut-off to the swept volume is called

Clearance ratio
None of these
Cut-off ratio
Expansion ratio

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

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