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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Which of the following boilers is best suited to meet fluctuating demands?

Locomotive
Lancashire
Babcock and Wilcox
Cochran

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Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of well maintained boiler will be of the order

0.75
0.5
0.4
0.9

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Steam Boilers, Engines, Nozzles and Turbines
The length of shell of a Locomotive boiler is

3 m
2 m
4 m
1 m

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

Stationary water tube boiler
Water tube boiler with natural/forced circulation
Stationary fire tube boiler
Mobile fire tube boiler

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Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

Less than
None of the listed here
Equal to
More than

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

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

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