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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

150 kg/h
280 kg/h
340 kg/h
210 kg/h

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Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbine is a

None of these
Simple reaction turbine
Impulse-reaction turbine
Simple impulse turbine

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Steam Boilers, Engines, Nozzles and Turbines
Ultimate analysis of fuel is determination of percentage of

Fixed carbon, ash, volatile matter, moisture
Lower calorific value
Carbon, hydrogen, nitrogen, sulphur, moisture
Higher calorific value

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following are boiler accessories?

Economizer
Both (A) and (B)
None of these
Superheater

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Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to

Air delivered by forced draft fan
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Provide air around burners for obtaining optimum combustion
Transport and dry the coal

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Steam Boilers, Engines, Nozzles and Turbines
A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

450 m/s
900 m/s
79 m/s
188 m/s

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