Consider the following boilerhazards:
1- High steam pressure in the boiler exceeding design limits
2- High steam temperature in the boiler
3- Low water level in the boiler
4- High water level in the boiler
5- High pressure of hot gases inside the furnace
6- Low pressure of hot gases inside the furnace
7- Flammable and toxic gases build up in flues
8- Explosive gas mixture in the furnace or flues
Consider each of the above hazards separately. Foreach of the hazards give the following details:
a) Suggest the suitable safety control function
b) Draw a simple block diagram of this control function usingmanual drawing tools or computer software (do not copy and pastethe images, no freehand drawings)
c) Explain the working of the above control function in your ownwords
d) Explain how the above control function protects against therespective hazard
(Five marks for each hazard. Total marks forpractical: 40)
