A steam generating unit consists of a number of elements all of which contribute to the production of steam.The elements of a typical steam generator include:
1 boiler2 superheater
3 water conditioner
4 reheater
5 economizer
6 steam piping
7 air heater
8 fuel equipment
9 draft fans
A ) 1, 2, 7, 8, 9
B ) 1, 2, 4, 5, 7, 8, 9
C ) 3, 4, 6, 7, 8
D ) 1, 2, 3, 4, 5, 6, 7, 8, 9
Answer: D