a) 2.5, 3.0, 3.5 b) 3.5, 3.0, 2.5 c) 3.0, 2.5, 3.5 d) 3.5, 2.5, 3.0 Ans: (a)
Leaving the node 20 MW, 25 MW Entering the node 60 MW, 30 MW Balance power will be
a) 30 MW leaving the node. b) 45 MW leaving the node. c) 45 MW entering the node. d) 22.5 entering the node and 22.5 MW leaving the node. Ans: (b)
a) 2.5, 3.0, 4.0 b) 4.0, 3.0, 2.5 c) 3.0, 2.5, 3.5 d) 4.0, 2.5, 3.0 Ans: (b)
a) 3-phase fault b) L-L fault c) L-L-G fault d) L-G fault Ans: (a)
a) The negative and zero sequence voltages are minimum at the fault point and increase towards the neutral. b) The negative and zero sequence voltages are maximum at the fault point and decrease towards the neutral. c) The negative sequence is maximum and zero sequence minimum at the fault point and decreases and increase respectively towards the neutral. d) None of the above. Ans: (b)
a) Ia1 Z1 b) Ia1 (Z1 + Z2) c) Ia1 (Z1 + Z2 + Z0) d) Ia1 (Z2 + Z0) Ans: (a)
a) The insulators and lightning arresters should have high impulse ratio. b) The insulators and lightning arresters should have low impulse. c) The insulators should have high impulse ratio and lightning arrester low. d) The insulators arrester should have high impulse ratio but insulator low. Ans: (c)
a) 20 ohms b) 200 ohms c) 800 ohms d) None of the above Ans: (d)
a) SCR is high. b) SCR is low. c) Voltage control is independent of SCR. d) None of the above. Ans: (b)