Turbo Alternator Multiple Choice Questions and Answers

11. Turbo-alternators are generally used to run at

   A.1500 r.p.m.

   B.3000 r.p.m.

   C.5000 r.p.m.

   D.15000 r.p.m.

12. In case of turbo-alternators the rotor is usually made of

   A.Cast iron

   B.Forged steel

   C.Laminated stainless steel

   D.Manganese steel

13. The number of poles in turbo-alternators is usually

   A.2

   B.4

   C.12

   D.50

14. What kind of rotor is most suitable for turbo-alternators which are designed to run at high speed

   A.Salient pole type

   B.Non-salient pole type

   C.Inversely proportional to its upper 3dB frequency

   D.None of the above

15. For a given output steam turbo-alternators are much smaller is size than water turbine -alternators because

   A.Steam turbo-alternators are built with smaller capacities

   B.Steam turbo-alternators have long rotors

   C.Steam turbo-alternators run at high speed

   D.All of the above

< 1 2 3 4 5 6 7 8 Next>