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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The balanced draft furnace is one using

Induced draft fan and chimney
Forced draft fan and chimney
Any one of the above
Induced draft fan and forced draft fan

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Steam Boilers, Engines, Nozzles and Turbines
When the nozzle operates with the maximum mass flow, the nozzle is said to be

Under-damping
Over-damping
Choked
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Ultimate analysis of fuel is determination of percentage of

Lower calorific value
Fixed carbon, ash, volatile matter, moisture
Carbon, hydrogen, nitrogen, sulphur, moisture
Higher calorific value

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

sin²α
cot²α
tan²α
cos²α

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Steam Boilers, Engines, Nozzles and Turbines
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

Blow off cock
Stop valve
Fusible plug
Safety valve

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Steam Boilers, Engines, Nozzles and Turbines
The performance of a boiler is measured by the

Amount of water evaporated per hour
Steam produced in kg/kg of fuel burnt
All of the listed here
Steam produced in kg/h

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