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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is

Minimum
Depends on temperature also
Zero
Maximum

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Steam Boilers, Engines, Nozzles and Turbines
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be

1.67
0.4
0.67
0.56

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the clearance volume to the swept volume is called

None of these
Clearance ratio
Expansion ratio
Cut-off ratio

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

None of these
Steam jet
Chimney
Centrifugal fan

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following substance will have same percentage in both proximate and ultimate analysis?

Hydrogen
Volatile matter
Ash
Moisture

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