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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

Convergent-divergent nozzle
Convergent nozzle
Divergent nozzle
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Sulphur in coal results in

Facilitating ash precipitation
Spontaneous combustion during coal storage
Corroding air heaters
All of these

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is generally placed between

Induced draft fan and forced draft fan
Last superheater or reheater and air preheater
Air preheater and chimney
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The maximum heat loss is a boiler occurs due to

Dry flue gases
Unburnt carbon
Moisture in fuel
Steam formation

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Steam Boilers, Engines, Nozzles and Turbines
The cylindrical shell of a Lancashire boiler has diameter from

1.25 to 2.25 m
1.5 to 2.5 m
1.75 to 2.75 m
1 to 2 m

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes in a Lancashire boiler compared to its shell is

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

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