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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the atmospheric pressure.

Equal to
Higher than
Lower than
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Fusible plug for boilers is made of fusible metal containing tin, lead, and

Copper
Aluminium
Bismuth
Nickel

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Steam Boilers, Engines, Nozzles and Turbines
The water tubes in a simple vertical boiler are

Vertical
Horizontal
Inclined
None of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to

Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Air delivered by forced draft fan
Transport and dry the coal
Provide air around burners for obtaining optimum combustion

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Steam Boilers, Engines, Nozzles and Turbines
The best suited coal for chain or traveling grate stoker boiler is

Pulverized coal
High sulphur coal
Non-coking or free burning coal
Coking coal

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Steam Boilers, Engines, Nozzles and Turbines
Boiler parameters are expressed by

Temperature of steam in °C
Pressure of steam in kg/cm²
All of these
Tonnes/hr. of steam

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