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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The height of chimney in a power plant is governed by

Control of pollution
Quantity of flue gases to be handled
Limitation of construction facilities
The draft to be created

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)

V = 44.72 hd K
V = 44.72 K hd
V = 44.72 K hd
V = 44.72 K hd

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Steam Boilers, Engines, Nozzles and Turbines
When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a

Slow speed engine
None of the listed here
High speed steam engine
Medium speed steam engine

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of fire tubes in Cochran boiler is of the order of

12 cm
6 cm
2 cm
8 cm

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Steam Boilers, Engines, Nozzles and Turbines
A boiler in India should conform to safety regulations of

ASTM
DIN
IBR
BS

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Steam Boilers, Engines, Nozzles and Turbines
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Boil
Cool down
Flash i.e. get converted into steam
Remain as it was

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