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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

Convergent nozzle
Divergent nozzle
None of these
Convergent-divergent nozzle

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Steam Boilers, Engines, Nozzles and Turbines
At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is

Minimum
Zero
Depends on temperature also
Maximum

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Steam Boilers, Engines, Nozzles and Turbines
A supercritical boiler is one that operates above the pressure and temperature of following values

218 kg/cm² abs and 540°C
1 kg/cm² and 100°C
100 kg/cm² and 540°C
218 kg/cm² abs and 373°C

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of superheated tubes in a locomotive boiler is

230 mm
130 mm
13 mm
31 mm

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Steam Boilers, Engines, Nozzles and Turbines
The forced circulation of water does not take place in

LaMont boiler
Lancashire boiler
Benson boiler
Velox boiler

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Steam Boilers, Engines, Nozzles and Turbines
In water wall furnace, the heat is transferred to the water walls by

Conduction
Radiation
Radiation and conduction
Convection

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