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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

Gross efficiency
Nozzle efficiency
Diagram efficiency
None of these

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Steam Boilers, Engines, Nozzles and Turbines
A fusible plug is fitted in small boilers in order to

Extinguish fire if water level in the boiler falls below alarming limit
Control steam dome
Avoid explosion
Avoid excessive build up of pressure

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Steam Boilers, Engines, Nozzles and Turbines
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.

60°
90°
270°
180°

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Steam Boilers, Engines, Nozzles and Turbines
In locomotive boiler, maximum steam pressure is limited to

10 kg/cm²
18 kg/cm²
1 kg/cm²
5 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
Relative percentage of heat absorbed through the heat transfer of(i) Furnace water wall(ii) Boiler tank(iii) Superheater(iv) Economizer(v) Air-heater of a typical boiler of 200 MW capacity would be of the order of

20 : 48 : 7 : 15 : 10
48 : 20 : 15 : 7 : 10
10 : 7 : 15 : 20 : 48
7 : 15 : 20 : 10 : 48

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Steam Boilers, Engines, Nozzles and Turbines
The clearance in the engine cylinder

Increases the workdone
All of these
Increases the mean effective pressure
Decreases the efficiency of the engine

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