1. boiler effectiveness
2. boiler evaporative capacity
3. factor of evaporation
4. boiler efficiency
boiler efficiency
1. can be raised rapidly
2. is raised at slower rate
3. is raised at same rate
4. could be raised at fast/slow rate depending on design
can be raised rapidly
1. 20%
2. 40%
3. 50%
4. 90%
90\%
1. 15%
2. 20%
3. 30%
4. 45%
30\%
1. pulverized fuel fired boiler
2. cochran boiler
3. lancashire boiler
4. babcock and wilcox boiler
lancashire boiler
1. boiler efficiency, turbine efficiency generator efficiency
2. all the three above plus gas cycle efficiency
3. carnot cycle efficiency
4. regenerative cycle efficiency
boiler efficiency, turbine efficiency generator efficiency
1. vertical fire tube type
2. horizontal fire tube type
3. horizontal water tube type
4. forced circulation type
forced circulation type
1. 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
2. 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
3. feed pump is employed to supplement natural circulation in water wall type furnace
4. water is converted into steam in one pass without any re-circulation
water is converted into steam in one pass without any re-circulation
1. prevent flat surfaces under pressure from tearing apart
2. take care of failure in shear
3. take care of failure in compression
4. provide support for boiler
prevent flat surfaces under pressure from tearing apart
1. one-fourth
2. half
3. one
4. two
one