151. The basic function of voltage stabilizer is to provide :
152. A food mixture rated for 240 V AC fails to start when it is switched on. Which one of the following is NOT a cause for the above?
153. In a transformer the leakage flux may he minimized by :
154. The phase relationship between primary and secondary terminal voltage of a transformer is :
155. The no load primary current Io in an ideal transformer is :
156. One of the diode of a bridge rectifier connected to 100 V 50 Hz AC input is found to be damaged. The DC output of the circuit is 90 V. The minimum value of PIV of the diode required for replacement is :
157. You are working with a fully automatic star delta starter. You notice that when start switch is pressed the motor starts in star but docs not change to delta. The trouble will be in :
158. Watt-hour meter is classified ns a :
159. During no load test of a 3 phase induction motor, the motor draws power :
160. The recent method of smooth speed control of a three-phase induction motor over a wide range is :
161. Rotor bars of squirrel cage rotor are sometimes skewed :
162. For 66 kV lines the number of insulator discs used is :
163. AC resistance of a line conductor is more than its DC resistance because of:
164. The back emf set up in the armature of a synchronous motor depends on :
165. The current drawn by an over excited synchronous motor will be :
166. Two alternators are sharing an inductive toad equally. What will be happened if the excitation of one alternator is increased?
167. A ceiling fan rotates slowly in either direction. The probable fault is :
168. In repulsion motor, maximum torque is developed when :
169. Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a :
170. Buchholz relay is operated by :
171. The size of earth wire is determined by :
172. The best location of the power factor improving device to be installed in the transmission line is at:
173. ___________motor has series characteristics.
174. A social Reformer of Kerala who started Atmavidhya Sangham was :
175. 'The Career and legend of VascodaGama” is a book written by : Sanjay Subramaniyamcr Arun Shourie Kushwant Singh None of these