A) 1.0 B) 2.2 C) 22 D) 44. Ans : (C)
A) 1.0 B) 2.2 C) 4.4 D) 44. Ans : (D)
A) Provide protection against lightning B) Provide protection against corona C) Provide protection due to surges occurring during switching operations D) For all above protections. Ans : (C)
A) 1 : 3 B) 1 : 2 C) 1 : 1 D) 1 : 4. Ans : (A)
A) single phase to there phase transformation B) three phase to single phase transformation C) three phase to three phase and three phase to two phase transformation D) any of the above. Ans : (C)
A) the current is unsymmetrical alternating B) the current in the coil is sinusoidal only C) the current in the coil is DC only D) the current in the coil is alternating. Ans : (D)
A) Hysteresis loss B) Eddy current loss C) Insulation requirement D) Copper loss. Ans : (C)
A) Size of transformer B) Output frequency C) Wave shape distortion D) Copper losses. Ans : (A)
A) 1 : 1 B) 1 : 2 C) 1 : 3 D) 1 : 4. Ans : (B)
A) Open-circuit test B) Short circuit test C) Type tests D) Back to back test. Ans : (D)