Q.83 For a 3-phase induction motor, the synchronous speed is 3000 rpm. Find the actual rotor speed if the slip is 3%.Ans A. 2970 rpmB. 2730 rpmC. 2820 rpmD. 2910 rpmCorrect Ans Provided: D

Q.97 The phenomenon of oscillation of the rotor about its equilibrium position is called ________.Ans A. phase lockingB. huntingC. pluggingD. single phasingCorrect Ans Provided: B

Q.60 Which of the following is NOT a valid advantage of static capacitors being used for power factor improvement?Ans A. No rotating partsB. Long service life – more than 15 yearsC. Less maintenanceD. Low lossesCorrect Ans Provided: B

Q.110 Find Geq in the following network.Ans A. 6 SB. 4 SC. 10 SD. 8 SCorrect Ans Provided: B

Q.73 State TRUE/FALSE for following statements.1. In a delta-delta system, the line voltage and phase voltage are equal.2. When a Y-connected load is supplied by voltages in abc phase sequence, the line voltages lag the corresponding ...

Q.66 With reference to the delta-delta connection of a 3-phase transformer, state TRUE/FALSE for following statements.1. It is satisfactory for both balanced and unbalanced loading.2. Third harmonic does not appear in the output voltage wave.Ans A. ...

Q.58 Find the most economical value of the diameter of a single core cable to be used on a 50-kV, single phase system. The maximum permissible stress in the dielectric should not exceed 40√2 kV/cm.Ans A. 2.5 cmB. ...

Q.77 Which of the following is a non-fusion welding?Ans A. Submerged arc weldingB. Carbon arc weldingC. Inert gas weldingD. Forge weldingCorrect Ans Provided: D

Q.65 Arrange the following materials in ascending order with reference to the resistance offered to electrical current?Glass, Silver, GermaniumAns A. Silver, Glass, GermaniumB. Silver, Germanium, GlassC. Germanium, Glass, SilverD. Glass, Germanium, SilverCorrect Ans Provided: B

Q.90 In CRO, _____________ is NOT a part of the vertical deflection system.Ans A. main amplifierB. preamplifierC. time base generatorD. delay lineCorrect Ans Provided: C