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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks

180° to each other
0° to each other
None of these
90° to each other

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Steam Boilers, Engines, Nozzles and Turbines
Water and sediment in fuel oil can be removed by

Heating the oil in the settling tanks
Suspension
Burning the oil
Cooling the oil in the settling tanks

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Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on weight basis is

0.3
0.4
0.21
0.23

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Steam Boilers, Engines, Nozzles and Turbines
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

100°C and 1.1 bar pressure
50°C and 1.1 bar pressure
50°C and normal atmospheric pressure
100°C and normal atmospheric pressure

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Steam Boilers, Engines, Nozzles and Turbines
Feed water conditioning in thermal power plants in done to

Increase heat transfer rate
Increase efficiency of thermal power plant
Reduce hardness and for removal of solids
Increase steam parameters

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following varieties of coals is mostly used in steam boilers?

Brown coal
Non-coking bituminous coal
Peat
None of the listed here

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