Q.61 The agents which contaminate the insulating oil are————- .Ans 1. presence of sludge2. presence of water3. presence of dirt and dust4. All of the optionsCorrect Ans Provided: 4

Q.67 Synchronous motor for power factor correction operates atAns 1. Normal load with zero excitation2. No load with under-excited fields3. No load with over-excited fields4. Normal load with minimum excitationCorrect Ans Provided: 3

Q.50 Which of the following 3-phase ac to dc converter requires neutral point connection?Ans 1. 3-phase semiconductor2. 3-phase full converter3. 3-pahse half wave converter4. 3-phase converter with diodesCorrect Ans Provided: 3

Q.68 If current I passing through inductive coil L, varies from zero to I in time zero to ‘t’ sec , the energy stored by the inductance is ________________Ans 1. ½ I²t2. ½ L² I3. ½ It²4. ½ ...

Q.80 ……. are used to limit short circuit current in a power system.Ans 1. isolators2. earth wire3. series reactors4. H.R.C FuseCorrect Ans Provided: 3

Q.70 State the uses of ARC lampAns 1. Industrial lighting2. Display application3. Public lighting4. Cinema projectorCorrect Ans Provided: 4

Q.88 IGBT device is a ………………Ans 1. Power-controlled device2. Voltage-controlled device3. Frequency-controlled device4. Current-controlled deviceCorrect Ans Provided: 2

Q.63 Which part of the wind mill acts as a housing for the turbine?Ans 1. Wind Vane2. Turbine3. Wind mill head4.  ShaftCorrect Ans Provided: 3

Q.87 Find the correct sentence from the followingAns 1. Option (C): Energy is required to create and maintain the flux2. Option (A): Magnetic flux does not actually flow through the magnetic circuit3. Option (B): There is no perfect ...

Q.73 An ACSR conductor of size 48/7 means thatAns 1. The conductor has 55 strands.2. It has 48 strands of steel and 7 strands of aluminium.3. It has 7 strands of steel and 48 strands of aluminium.4. The ...