Consider the table given:
Constructional feature
|
Machine type
|
Mitigation
|
(P) Damper bars
|
(S) Induction motor
|
(X) Hunting
|
(Q) Skewed rotor slots
|
(T) Transformer
|
(Y) Magnetic locking
|
(R) Compensation winding
|
(U)Synchronous machine
|
(Z) Armature reaction
|
|
(V) DC machine
|
|
The correct combination that relates the constructional feature, machine type and mitigation is
1. P - V - X, Q - U - Z, R - T - Y
2. P - U - X, Q - S - Y, R - V - Z
3. P - T - Y, Q - V - Z, R - S - X
4. P- U - X, Q - V - Y, R - T - Z