Boiler Troubles- Scale, Sludge, Priming, Foaming and Caustic Embrittlement

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Name of student *

Full Name of College/ Institute *

1. Caustic embrittlement takes place in boiler parts like___ *

1 point

metal pipes

plastic pipes

rubber materia

wiring

2. Scale and sludge are bad conductors of heat. *

1 point

True

False

3. Priming and foaming are interrelated to each other. *

1 point

True

False

4. Boiler water should be free from. *

1 point

turbidity

oil

dissolved gases

All of the above

5. The formation of stable bubbles on the surface of the water is called Foaming. *

1 point

True

False

6. Caustic soda is___ *

1 point

NaOH

Na2CO3

NaCl

Na(HCO3)2

7. Scale is hard like rocks which cannot be removed even by hammering. *

1 point

True

False

8. Sludge is formed in the cooler portion of the boiler *

1 point

True

False

9. Sludge can be removed by brush or acid wash. *

1 point

True

False

10. Due to too high water level priming can take place *

1 point

True

False

11. As water evaporates in the boiler, the concentration of sodium carbonates increases *

1 point

True

False

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