This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Synchronous Machine Applications”. 1. One of the most prominent component of base loads is ___________ a) synchronous generator b) induction generator c) dc series generator d) all of the mentioned 2. ______ alternator is used in thermal stations and ______ alternator is … Read more
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Starting of Synchronous Motors”. 1. Synchronous motors are ___________ a) not self starting b) self starting c) single excited d) none of the mentioned 2. Which method is/are used to perform magnetic locking? I. Auxiliary motor II. Dc motor III. induction motor … Read more
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Power Factor Correction by Synchronous Motors”. 1. The magnetization current drawn from an AC supply a synchronous motor is used to _________ a) set up flux in magnetic circuit of device b) compensate core losses c) set up magnetizing armature reaction d) … Read more
This set of Electrical Machines Questions and Answers for Entrance exams focuses on “Efficiency of Synchronous Machines”. 1. The short circuit load losses is/are ______________ a) direct load loss and stray load losses b) direct load loss c) stray load losses d) field current loss 2. The open circuit voltage and open circuit core loss … Read more
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Measurement of Xd and Xq”. 1. The d-axis reactance is determined by ______________ a) OCC & SCC b) OCC c) Slip test d) SCC 2. The slip test is used to determine ____________ a) Xq b) Xd c) Xd and Xq d) … Read more
This set of Electrical Machines Interview Questions and Answers for freshers focuses on “Hunting and Damper Windings”. 1. The relative speed between rotor and stator field is zero. This means ___________ a) mechanical speed of rotor is equal to stator field speed b) mechanical speed is zero c) stator field is stationary d) none of … Read more
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Synchronous Machine Stability”. 1. Steady state stability limit is defined as maximum power flow possible through a particular point without loss of stability when the ___________ a) power is increased gradually b) power is increased suddenly c) power is reduced gradually d) … Read more
This set of Electrical Machines Multiple Choice Questions & Answers focuses on “Synchronizing Power and Synchronizing Torque”. 1. The coupling angle or load angle of a synchronous motor is defined as the space angle between __________ a) rotor and stator poles of opposite polarity b) rotor and stator poles of same polarity c) rotor and … Read more
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Power Angle Characteristics of Synchronous Machines”. 1. Choose the correct power angle characteristics for the synchronous motor and generator. a) b) c) d) None of the mentioned 2. For a 3 phase 400V alternator having 0.5pu of synchronous reactance and its excitation … Read more
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Two Reaction Theory of Salient Pole Machines”. 1. In salient-pole machines, the armature mmf cannot be accounted for by introducing one equivalent reactance due to __________ a) non-uniform airgap b) variable resistance c) non-uniform air gap d) any of the mentioned 2. … Read more
