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Steam Boilers, Engines, Nozzles and Turbines

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

LaMont boiler
Lancashire boiler
Velox boiler
Benson boiler

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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
ps - pa
pa + ps
pa - ps

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Babcock and Wilcox boiler
Benson boiler
Locomotive boiler
Lancashire boiler

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Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on volume basis is

0.21
0.3
0.23
0.4

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Efficiency of the fan
Efficiency of the boiler
Efficiency of the chimney
Power of the boiler

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Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)

cos²α
cot²α
sin²α
tan²α

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