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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Hard coke is produced by carburization of coal at

500-600°C
700-850°C
950-1100°C
Atmospheric temperature

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive type' boiler is

Horizontal multi-tubular fire tube type
Horizontal multi-tubular water tube boiler
Vertical tubular fire tube type
Water wall enclosed furnace type

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Steam Boilers, Engines, Nozzles and Turbines
The artificial draught is produced by

Centrifugal fan
Both (A) and (B)
Steam jet
Chimney

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Steam Boilers, Engines, Nozzles and Turbines
The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop

Is unpredictable
Decreases
Remains the same
Increases

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Steam Boilers, Engines, Nozzles and Turbines
For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be

One-half the height of chimney
Four times the height of chimney
Two times the height of chimney
Equal to the height of chimney

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Cochran boiler usually have _________ diameter.

72.5 mm
92.5 mm
6.25 mm
62.5 mm

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