STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

8 cm

6 cm

12 cm

2 cm

Create vacuum at turbine exhaust

Dose chemicals in feed water

Create vacuum in furnace

Pump feed water

Serve as storage of steam

Remove salts from water

Serve as storage of feed water for water wall

Separate steam from water

Some moisture in coal helps in better burning which is not possible with completely dry coal

It increases thermal efficiency

Inherent moisture and surface moisture are different things

In some coals moisture may be present up to 40%

All of these

Carryover

Scale

Corrosion

Supplied mounted on a single base

Supplied by same manufacturer loose and assembled at site

Packaged boiler does not exist

Purchased from several parties and packed together at site

(h + hf1)/2257

(h - hf1)/2257

(h × hf1)/2257

None of these

Lancashire boiler

Babcock and Wilcox boiler

None of these

Yarrow boiler

Correct fuel air ratio

Proper ignition temperature

O₂ to support combustion

All the three above

Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam

Feed pump is employed to supplement natural circulation in water wall type furnace

Water is converted into steam in one. Pass without any recirculation

Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum