1. 1 Prepared By: M Moarraf Naeem
Interview Question
1. Introduce yourself? Mention about your education, experience & family?
2. Explain Faraday’s Law?
3. Can we generate DC?
4. What is magnetic field?
5. What is magnetic field of earth? What will happen if it is reversed?
6. What are gas turbine & Generator Protections? Explain …. Protection?
7. Explain switch yard scheme and division?
8. How many stages compressor/turbine have? Which common term is used for moving
and fixed blades?
9. Which type of compressor is installed with GT?
10. Explain bleed valve operation? Their open/close settings and purpose?
11. Explain compressor surge?
12. Explain IGV and their function?
13. What are GT changeover conditions?
14. Explain STG de-sync procedure with 2 HRSG’s?
15. What are HP steam pressure and temperatures?
16. Explain turbine supervisory control (GMA)?
17. Explain sliding pressure mode?
18. What is fabrication?
19. What are Heat treatment processes?
20. What is main purpose of annealing?
21. Which factor differentiates between mild steel and carbon steel?
22. What is steel?
23. What is UPVC?
24. What is gas turbine?
25. Explain FOTP main purpose?
26. Why we dose KI200?
27. Why temp. is increased before filtration skid?
28. Why we step up?
29. Tell the temp. after C.C and turbine and how they are measured?
30. How can you define efficiency in general terms?
31. What is productivity?
32. Explain generator capability curve and limits of power factor?
33. On which parameters performance of generator depends?
34. What are responsibilities of operation/maintenance engineer?
35. What are OEM recommendations to run the plant?
36. Tell us about the chemistry of steam upstream STG?
37. Compare the spread of GE & Siemens gas turbine?
38. Compare working principle of Centrifugal & Screw type pumps?
39. Compare gas turbines of Block 2 & 3? Compare their working principle too?
40. What are different starting means of gas turbine?

2. 2 Prepared By: M Moarraf Naeem
41. What are vibration limits on GT & STG on block 2/3?
42. What type of vibration probe we are using?
43. Tell us about your class room training? Any suggestion to improve?
44. Explain Generator principle?
45. Explain active power, reactive power and power factor?
46. Explain generator capability curve and mention limits of power factor and reactive
power?
47. Explain generator cooling?
48. What are standard distribution voltages in Pakistan?
49. Explain Bryton cycle?
50. What are GT/STG critical trips?
51. How we are measuring vibration?
52. Tell us percentage of losses from each component of GT?
53. What is starting motor cut off speed and what is its typical term we use?
54. Why we are using transformers and what changes happen to V & I after it?
55. How we can differentiate our switchyard?
56. Explain GT startup?
57. What is reverse power?
58. What are main activities of Electrical section during HGPI & CI?
59. What is foggy weather procedure?
60. What is role of safety department and what is fresh eye?
61. Why we isolate and de-isolate equipment?
62. As we reach self-sustaining speed at 50% speed then why starting motor cutoff at
60% speed?
63. What are different parts of combustion chamber?
64. What is the effect of ambient temperature on efficiency of GT?
65. Explain CPD curve?
66. What is the ideal lube oil temperature for best lubrication?
67. How we maintain lube oil temperature and pressure?
68. What are lube oil temperature & pressure limits in lube oil header?
69. How many types of heat exchangers we are using?
70. Explain bearing protection?
71. On which fuel we can start GT in KAPCO?
72. What are changeover conditions from HSD to BFO? Explain changeover?
73. How we can test AC & DC lube oil pumps?
74. What types of pumps we are using at Block-2?
75. At what speed flame become stable?
76. Differentiate between “failure to ignite” and “loss of flame”?
77. What positions flame detectors and spark plugs are installed?
78. How we detect boiler tube leakage and explain its maintenance?
79. What is radiography?