Electrical Machines
Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces

  noise and pullout torque, but increase parasitic and starting torque.
  noise, parasitic torque, starting torque and pull out torque.
  noise and parasitic torque, but increase starting and pull-out torque.
  noise, parasitic and starting torque, but increase pull out torque.

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Electrical Machines
Which is the arrangement of windings in a core type single phase transformer?

 Half lv inside and half hv outside on each core limb
 Half hv inside and half lv outside on each core limb
 Sandwiched lv and hv discs on each core limb
 Lv on one core limb and hv on the other

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Electrical Machines
The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

 Xd = 9.6Ω and Xq = 9Ω
 Xd = 8Ω and Xq = 10.8Ω
 Xd = 10.8Ω and Xq = 8Ω
 Xd = 9Ω and Xq = 9.6Ω

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