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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For combustion of a fuel, following is essential

Correct fuel air ratio
Proper ignition temperature
All the three above
O₂ to support combustion

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Steam Boilers, Engines, Nozzles and Turbines
The safety valve on boiler drum compared to safety valve on superheater is set at

Lower/higher depending on steam flow
Higher value
Same value
Lower value

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Steam Boilers, Engines, Nozzles and Turbines
In a reaction turbine, when steam flows through the moving blades,

Pressure decreases while velocity increases
Pressure and velocity both increases
Pressure increases while velocity decreases
Pressure and velocity both decreases

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Steam Boilers, Engines, Nozzles and Turbines
Latent heat of dry steam at atmospheric pressure is equal to

100 kcal/ kg
539 kcal/ kg
427 kcal/ kg
539 BTU/ lb

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes of a Lancashire boiler is about ___ that of its shell.

One-third
Two-fifth
One-half
One-fourth

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is of

All of the listed here
Stationary < fire tube type
Horizontal type
Natural circulation type

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