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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

Increases the efficiency of the turbine
Increases the work-done through the turbine
All of these
Reduces wear on the blades

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the actual vacuum to the ideal vacuum in a condenser is called

Boiler efficiency
Condenser efficiency
Nozzle efficiency
Vacuum efficiency

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Steam Boilers, Engines, Nozzles and Turbines
It is required to produce large amount of steam at low pressure. Which boiler should be used?

Babcock and Wilcox boiler
Pulverized fuel fired boiler
Cochran boiler
Lancashire boiler

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is

0.053 bar
0.06 bar
0.007 bar
0.067 bar

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Steam Boilers, Engines, Nozzles and Turbines
Incomplete combustion can be best judged by

Measuring temperature of flue gases at exit of furnace
Smoky chimney exit
Excess air in flue gases
Measuring carbon monoxide in flue gases

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