A) 400 kV B) 264 kV C) 132 kV D) 66 kV. Ans : (B)
A) 6.6 kV B) 9.9 kV C) 11 kV D) 13.2 kV. Ans : (C)
A) reduced effective resistance but increased effective internal reactance of the conductor B) increased effective resistance but increased effective internal reactance of the conductor C) reduced effective resistance as well as effective internal reactance D) increased effective resistance as well as effective internal reactance. Ana : (B)
A) size of the conductor B) frequency of the current C) resistivity of the conductor material D) all of the above. Ans : (D)
A) 105o C B) 120o C C) 180o C D) 130o C. Ans : (B)
A) 3 phase - 4 wire B) 3 phase - 3 wire C) Single phase - 3 wire D) Single phase - 4 wire. Ans : (D)
A) resistivity of conductor material increases B) permeability of conductor material increases C) frequency increases D) diameter increases. Ans : (A)
A) Diameter of conductor B) (diameter of conductor)1/2 C) (diameter of conductor)2 D) (diameter of conductor)2. Ans : (C)
A) to increase clearance from ground B) to reduce clearance from ground C) to reduce wind and snow loads D) to take care of extension in length during summer. Ans : (A)
A) voltage decreases but power factor increases B) voltage increases but power factor decreases C) voltage and power factor both decrease D) voltage and power factor both increase. Ans : (D)