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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

Decreases
Increases
Remains constant
None of these

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of brake power to the indicated power is known as

Indicated thermal efficiency
Mechanical efficiency
Overall efficiency
Brake thermal efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Multi-stage steam turbines are of the

All of these
Velocity compounded type
Reaction type
Pressure compounded type

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Steam Boilers, Engines, Nozzles and Turbines
Size of boiler tubes is specified by

Mean diameter and thickness
Inside diameter and thickness
Outside diameter and thickness
Outside diameter and inside diameter

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of a thermal cycle increases by

Reheating of steam
Regeneration
Both (A) and (B)
Cooling of steam

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