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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

More
Equal
None of these
Less

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Steam Boilers, Engines, Nozzles and Turbines
The aim of a compound steam engine is

All of these
To reduce the temperature range in each cylinder
To reduce the length of stroke
To reduce the ratio of expansion in each cylinder

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is a water tube boiler?

Cochran boiler
Locomotive boiler
Babcock and Wilcox boiler
Lancashire boiler

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Steam Boilers, Engines, Nozzles and Turbines
The maximum steam pressure in a Locomotive boiler is limited to

18 MN/m²
0.18 MN/m²
180 MN/m²
1.8 MN/m²

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Steam Boilers, Engines, Nozzles and Turbines
The shell diameter and length of locomotive boiler are

1.5 m, 4 m
1.5 m, 6 m
2 m, 4 m
1 m, 4 m

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Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbines are mostly used

Where low speeds are required
For large power purposes
For small power purposes and low speeds
For small power purposes and high speeds

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