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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
If partial pressure of air and steam be ‘pa’ and ‘ps’ respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

None of these
pa - ps
pa + ps
ps - pa

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Steam Boilers, Engines, Nozzles and Turbines
Relative percentage of heat absorbed through the heat transfer of (i) Furnace water wall (ii) Boiler tank (iii) Superheater (iv) Economizer (v) Air-heater of a typical boiler of 200 MW capacity would be of the order of

20 : 48 : 7 : 15 : 10
10 : 7 : 15 : 20 : 48
48 : 20 : 15 : 7 : 10
7 : 15 : 20 : 10 : 48

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Steam Boilers, Engines, Nozzles and Turbines
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

50°C and 1.1 bar pressure
100°C and 1.1 bar pressure
100°C and normal atmospheric pressure
50°C and normal atmospheric pressure

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

None of these
Moderate
High
Low

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Steam Boilers, Engines, Nozzles and Turbines
The average operating pressure of Benson boiler is

100 bar
150 bar
250 bar
200 bar

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Steam Boilers, Engines, Nozzles and Turbines
The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as

None of these
Regenerative heating
Reheating of steam
Bleeding

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