Q.1
Generator transformers are ________________
  • a) Step-up transformers
  • b) Step-down transformers
  • c) Auto-transformers
  • d) One-one transformers
Q.2
In the CCGT, how many step-up transformers will require?
  • a) 3
  • b) 4
  • c) 5
  • d) 6
Q.3
Which of the following is one of the criteria of selecting particular generator transformer?
  • a) Low HV voltage
  • b) Low LV currents
  • c) High impedance
  • d) On-load tap-changer
Q.4
Generator transformers can undergo sudden load-changes.
  • a) True
  • b) False
Q.5
Station transformers are generally used for ____________
  • a) Providing generator voltage to transmission
  • b) Providing power to load from transmission
  • c) Isolating DC
  • d) To supply power section auxiliary
Q.6
Which of the following does not follow the criteria of station transformer?
  • a) LV at 11 kV
  • b) HV at 275-400 kV
  • c) Low impedance
  • d) On-load tap-changer required
Q.7
Operating load factor of station transformer must be _________
  • a) low
  • b) high
  • c) zero
  • d) infinite
Q.8
For a unit transformer HV voltage must be _____________
  • a) 400 kV
  • b) 200 kV
  • c) 24 kV
  • d) 100 kV
Q.9
What voltage of On-load tap-changer is required for unit transformer?
  • a) 11 kV
  • b) 23 kV
  • c) 400 kV
  • d) Not required
Q.10
On-load power factor for generator transformer is __________
  • a) high
  • b) low
  • c) can’t define
  • d) zero
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