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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The safety valve on boiler drum compared to safety valve on superheater is set at

Lower/higher depending on steam flow
Lower value
Higher value
Same value

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Steam Boilers, Engines, Nozzles and Turbines
When the nozzle operates with the maximum mass flow, the nozzle is said to be

Choked
None of these
Over-damping
Under-damping

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Steam Boilers, Engines, Nozzles and Turbines
A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

450 m/s
900 m/s
79 m/s
188 m/s

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Steam Boilers, Engines, Nozzles and Turbines
The water tubes in a Babcock and Wilcox boiler are

Horizontal
Inclined
Horizontal and inclined
Vertical

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Steam Boilers, Engines, Nozzles and Turbines
A closed vessel made of steel and used for the generation of steam is called a

Steam turbine
Steam injector
Steam condenser
Steam boiler

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

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