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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
1 kg.m is equal to

None of these
427 Joules
9.81 Joules
102 Joules

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

Less heating surface
Equal heating surface
Heating surface depends on other parameters
More heating surface

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Steam Boilers, Engines, Nozzles and Turbines
The crown of the fire box is made hemispherical in order to

Withstand pressure inside boiler
Resist intense heat in fire box
Give maximum strength
Give maximum space

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Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

All of these
Reduces wear on the blades
Increases the work-done through the turbine
Increases the efficiency of the turbine

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Steam Boilers, Engines, Nozzles and Turbines
A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

2.86
6.65
1.05
10.05

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Steam Boilers, Engines, Nozzles and Turbines
Which device is used in thermal power plants to reduce level of pollution?

Chimney
Precipitator
Induced draft fan
Smoke meter

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