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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is

2 kg
1 kg
4/3 kg
8/3 kg

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is not a boiler mounting?

Blow off cock
Feed check valve
Economiser
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

None of the listed here
ηS = ηB / ηN
ηS = ηN / ηB
ηS = ηB × ηN

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Steam Boilers, Engines, Nozzles and Turbines
Cochran boiler is a

Horizontal fire tube boiler
Horizontal water tube boiler
Vertical water tube boiler
Vertical fire tube boiler

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Steam Boilers, Engines, Nozzles and Turbines
A steam nozzle converts

Potential energy into heat energy of steam
Heat energy of steam into kinetic energy
Kinetic energy into heat energy of steam
Heat energy of steam into potential energy

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Steam Boilers, Engines, Nozzles and Turbines
The maximum discharge through a chimney occurs when the height of chimney is

Infinitely long
Outside temperature is very low
Equal to the height of the hot gas column producing draught
Around 200 meters

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