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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The factor of evaporation for all boilers is always

Less than unity
Greater than unity
Equal to unity
None of these

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Steam Boilers, Engines, Nozzles and Turbines
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

Over-damping
Under-damping
None of these
Choked

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Steam Boilers, Engines, Nozzles and Turbines
The heat balance sheet for the boiler shows the

Complete account of heat supplied by 1 kg of dry fuel and the heat consumed
Steam formed by combustion of hydrogen per kg of fuel
Moisture present in the fuel
All of these

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is of

Natural circulation type
Stationary < fire tube type
All of the listed here
Horizontal type

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following substance will have same percentage in both proximate and ultimate analysis?

Volatile matter
Moisture
Hydrogen
Ash

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Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

25 to 40%
15 to 25%
10 to 15%
40 to 60%

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