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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Caking coals are those which

Show little or no fusing action
Form lumps or masses of coke
Burn completely
Burn freely

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Steam Boilers, Engines, Nozzles and Turbines
One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is

1
0.6
0.8
0.2

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Steam Boilers, Engines, Nozzles and Turbines
Boiler stays are used to

Provide support for boiler
Prevent flat surfaces under pressure from tearing apart
Take care of failure in shear
Take care of failure in compression

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Steam Boilers, Engines, Nozzles and Turbines
When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

Condensing steam engine
Vertical steam engine
Slow speed engine
Non-condensing steam engine

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Steam Boilers, Engines, Nozzles and Turbines
At very low temperature, the melting and boiling temperatures become equal. This temperature is

303°K
0°K
273.16°K
373°K

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following gases has the highest calorific value?

Coal gas
Producer gas
Blast furnace gas
Water gas

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