STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

Throttling process

Isentropic process

Free expansion process

Isothermal process

Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required

Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler

Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit

Increase the temperature of saturated steam without raising its pressure

Domestic use

Blast furnace

Cement industry

Thermal power plant

Pressure increases while velocity decreases

Pressure decreases while velocity increases

Pressure and velocity both increases

Pressure and velocity both decreases

Flat characteristic

Linear characteristic

Drooping characteristic

Rising characteristic

Any one of the above

Induced draft fan and forced draft fan

Forced draft fan and chimney

Induced draft fan and chimney

When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit

When the cross-section of the nozzle increases continuously from entrance to exit

None of these

When the cross-section of the nozzle decreases continuously from entrance to exit

Blades are equiangular and frictionless

Blade velocity coefficient is unity

Blades are equiangular

Blade solidity is 0.65

Binary vapor plant

Regenerative feed heating

Any one of these

Reheating of steam

Low

High

Very low

Very high