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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for gases is

0.546
0.528
0.577
0.582

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Steam Boilers, Engines, Nozzles and Turbines
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

20 to 30%
10 to 15%
30 to 40%
15 to 20%

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Steam Boilers, Engines, Nozzles and Turbines
In a nozzle, whole frictional loss is assumed to occur between

Throat and exit
All of these
Inlet and outlet
Inlet and throat

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Steam Boilers, Engines, Nozzles and Turbines
The reheat factor is the ratio of the

None of these
Total useful heat drop to the total isentropic heat drop
Cumulative heat drop to the isentropic heat drop
Isentropic heat drop to the heat supplied

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is not a boiler mounting?

Blow off cock
Feed check valve
Economiser
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Cochran boiler are

Horizontal
Vertical
Inclined
None of these

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