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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The length of Lancashire boiler varies from

6 to 7 m
7.25 to 9 m
9 to 10 m
5 to 6 m

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Steam Boilers, Engines, Nozzles and Turbines
In a reaction turbine, when steam flows through the fixed blades,

Pressure decreases while velocity increases
Pressure and velocity both decreases
Pressure increases while velocity decreases
Pressure and velocity both increases

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Steam Boilers, Engines, Nozzles and Turbines
The pressure at which latent heat of vaporisation of water is zero, is

Below atmospheric pressure
1 kg/cm²
225.6 kg/cm²
100 kg/cm²

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

Feed check valve
Blow off cock
Economiser
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about pulverized fuel firing?

High burning rate is possible
Fuel burns economically
It is the best technique for burning high ash content fuel having low fusion ash
Heat release can be easily controlled

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