1. Name three ways that expansion and contraction of rotor and casing are handled at the H.P. End of the turbine?
2. How is over speeding of a turbine that has a reheater prevented after the turbine has tripped?
3. A steam heating system is changed from a 2” diameter header to a 6” diameter header. How much more steam can the header handle?
4. On a reaction turbine, which clearances are more crucial axial or radial?
5. What is the first step to setting up a water treatment program?
6. What is the effect of dissolved oxygen on boiler feedwater and how is it removed?
7. What are; Sodium Sulfite? Sodium Hydroxide? And Sodium Chloride?
8. True or false, Definition of a synchroscope? (Discusses phase angle and voltage).
9. In a surface condenser, how can you tell if vacuum loss is due to air infiltration or a dirty condenser?
10. Why does having a condenser improve turbine efficiency?
11. Explain the operation of an air ejector?
12. In a combined cycle gas turbine plant, what major maintenance repair is done to fix compressor fouling?
13. In a combined cycle gas turbine plant, what major operation procedures can be done to prevent compressor fouling?
14. A new boiler in your plant has a tag on it that states it has 65 sq. ft. heating surface and operates at 345 #/hr, it has an “s” stamp and a national board number. The installer attaches a new tag that says the heating surface is 50 sq. ft. and has a Btu input of 300,000 + Btu/hr (not sure of exact number). As chief of this plant, what is real hp and how do you know which tag is correct? (Chapter 146).
15. List 4 turbine trips not generator trips.
16. List 6 causes of turbine vibration?
17. You come across a thrust bearing that is reading 145°F where normally it has been 130°F. what do you do?
18. Explain the operation of a Kingsbury thrust bearing (drawing is optional).
19. Name three ways to determine safety valve capacity?
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