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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
Less
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes of a Lancashire boiler is about ___ that of its shell.

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

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Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

2 cos²α/(1 + cos²α)
(1 + cos²α)/2 cos²α
(1 + sin²α)/2 sin²α
2 sin²α/(1 + sin²α)

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Steam Boilers, Engines, Nozzles and Turbines
The behavior of coal in a furnace is determined by

The content of sulphur
The content of ash and heating value
The exact analysis
The proximate analysis

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Steam Boilers, Engines, Nozzles and Turbines
The amount of water evaporated from feed water at _________ into dry and saturated steam at 100° C at normal atmospheric pressure is called equivalent evaporation from and at 100° C.

100°C
0°C
40°C
60°C

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

Vertical
None of the listed here
Horizontal
Inclined

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