Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
Electrical Engineering XYZ MCQs Cogging and crawling are phenomena associated with: Correct answer: 3. The former during starting and the latter at a fraction of its rated speed Explanation: Cogging occurs during the starting of a cage induction motor, where the motor may fail to start or jerks when it starts. This is due to … Read more
Electrical Engineering XYZ MCQs Cogging of induction motor occurs at: Correct answer: 4. Low voltage and when stator and rotor poles are equal Explanation: Cogging of induction motor occurs at Low voltage and when stator and rotor poles are equal.
Electrical Engineering XYZ MCQs The power factor of squirrel cage induction motor is: Correct answer: 2. Low at light loads only Explanation: The power factor of a squirrel cage induction motor is generally low at light loads because the motor draws a significant amount of magnetizing current to establish the magnetic field, compared to the … Read more
Electrical Engineering XYZ MCQs An induction motor is, in general analogous to: Correct answer: 3. Two winding transformer with secondary short circuited Explanation: An induction motor can be analogously compared to a two-winding transformer, where the primary winding is analogous to the stator and the secondary winding to the rotor. When the rotor is short-circuited … Read more
Electrical Engineering XYZ MCQs As compared to DOL starting, a cage induction motor with star-delta starting shall have: Correct answer: 3. Reduced starting current Explanation: Star-delta starting method reduces the starting current by connecting the motor windings in star configuration during the start phase, which effectively applies only 1/√3 (about 58%) of the line voltage … Read more
Electrical Engineering XYZ MCQs Which of the following is the largest conversion device for same rating: Correct answer: 1. Synchronous machine Explanation: Synchronous machines are generally larger than DC and induction machines for the same power rating. This is due to the synchronous machine’s construction, which includes additional components like field windings and slip rings … Read more
Electrical Engineering XYZ MCQs Which type of motor is preferred in lifts: Correct answer: 2. DC Series motors Explanation: The preferred type of motor for lifts is the DC Series motor. This type is chosen because it provides high starting torque, which is essential for moving the lift from a stationary position. Additionally, DC Series … Read more
Electrical Engineering XYZ MCQs Which of the following motor is more expensive for same KW output rating: Correct answer: 2. Synchronous motor Explanation: Synchronous motors are typically more expensive than the other types listed (induction motor, DC shunt motor, AC single phase motor) for the same kW output. This is because synchronous motors require additional … Read more
Electrical Engineering XYZ MCQs In which of the following, voltage regulation may be zero or negative: Correct answer: 3. Leading power factor Explanation: Voltage regulation can be zero or negative when the leading power factor is present. This occurs because, with a leading power factor, the load current leads the voltage, effectively sending reactive power … Read more
Electrical Engineering XYZ MCQs What is the advantage of parallel operation of alternators: Correct answer: 4. All of the above Explanation: Therefore, all these factors contribute to the advantages of parallel operation of alternators.