The forced oil and air circulation method is usual one for transformers of capacities
A) upto 5 MVA
B) upto 10 MVA
C) upto 20 MVA
D) 30 MVA upwards
Correct Answer:
Verified
Q13: Helical windings are used in
A)distribution transformers
B)power transformers
C)shell
Q14: Multi-layer helical windings are commonly used in
Q15: Disc windings are primarily used in
A)short capacity
Q16: The heat dissipating capability of transformers of
Q17: Transformers with a capacity of upto _
Q19: The flash point of transformer oil should
Q20: The voltage control in electric supply networks
Q21: D.C. windings are
A)sometimes 2-layer type
B)never 2-layer type
C)always
Q22: The usual values of maximum flux densities
Q23: For 275 kV transformers, using cold rolled
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