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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For combustion of a fuel, following is essential

All the three above
Correct fuel air ratio
Proper ignition temperature
O₂ to support combustion

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Steam Boilers, Engines, Nozzles and Turbines
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

Low pressure turbine
Impulse turbine
Pass out turbine
Back pressure turbine

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Steam in water tube boiler as compared to fire tube boiler

Could be raised at fast/slow rate depending on design
Is raised at slower rate
Can be raised rapidly
Is raised at same rate

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about pulverized fuel firing?

It is the best technique for burning high ash content fuel having low fusion ash
Fuel burns economically
Heat release can be easily controlled
High burning rate is possible

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is used where working pressure and power required are

None of these
Low
Moderate
High

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