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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The major axis of elliptical manholes on the shell should be provided

Longitudinally
Anywhere
Circumferentially
On dished end

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

0.4
0.3
0.23
0.21

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Steam Boilers, Engines, Nozzles and Turbines
The function of injector used in small capacity boilers is to

Add make up water in the system
Pump water, similar to boiler feed pump
Inject chemical solution in feed pump
Create vacuum

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Steam Boilers, Engines, Nozzles and Turbines
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Blade velocity coefficient is unity
Blade solidity is 0.65
Blades are equiangular
Blades are equiangular and frictionless

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Steam Boilers, Engines, Nozzles and Turbines
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Boil
Cool down
Remain as it was
Flash i.e. get converted into steam

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Pressure gauge
Feed pump
Feed check valve
Injector

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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