The zero power factor method of an Alternator is used to find which parameter or property: Efficiency Synchronous Impedance Paralleling Voltage regulation Correct answer: 4. Voltage regulation The zero power factor method of an Alternator is used to determine its voltage regulation. Zero power factor method is also called the general method, the Potier reactance […]
Category: Electrical Machines
The secondary winding of which of the following types of the transformer should be always kept closed
Electrical Transformer MCQ: Statement: Of the mentioned transformers the secondary winding of which of the following transformer is always kept closed The secondary winding of _____________ should be always kept closed: Power transformer Current transformer Auto-transformer Potential transformer Correct answer: 2. Current transformer The secondary winding of a current transformer is always kept closed. Explanation: […]
Synchronous Motor MCQ Part 2
Synchronous Motor MCQ Part 2. Electrical Engineering MCQ questions on Synchronous motor. What is value of angle between induced voltage and supply voltage of synchronous motor under the running condition What is value of angle between induced voltage and supply voltage of synchronous motor under the running condition: 0 to 90 degrees 90 to 180 […]
Synchronous Motor MCQ Part 1
Synchronous motor MCQ part 1. Electrical Engineering Multiple choice questions on Synchronous motors for interviews, job exams, and concept development. Synchronous motors generally have Synchronous motors generally have: Non-salient pole rotor Salient pole rotor Smooth cylindrical rotor Correct answer: 2. Salient pole rotor Which of the following is correct statement about the magnitude of field […]
Transformer MCQ Questions Part 1
Transformer MCQ Questions Part 1 by ElectricalEngineeringMCQ Under: Electrical Transformer MCQ Connecting 1000 KVA transformers in parallel If two transformers of 1000 kVA are operated in parallel, the first one having a 6% impedance, and the other one having a 3% impedance, each having the same turns ratio are connected to a 1700 kVA common […]
The temperature rise of transformer is directly proportional to
The temperature rise of transformer is directly proportional to: Real power Apparent power Reactive power None of these Correct answer: 2. Apparent power The temperature rose of transformer is directly proportional to the apparent power.
Potential Transformer MCQ Questions with Answers
A Potential transformer or PT is a type of special-purpose transformer that is designed to sample high voltage and provide a low secondary voltage that is directly proportional to it. Given below are most important basic MCQs on Potential transformers. Secondary winding rating of Potential Transformer Usually, Potential transformers have a secondary winding rating of: […]
Current Transformer MCQ Questions with Answers
A current transformer is a type of instrumentation transformer that steps down current in power systems to safe levels that can be processed via relays and measurement devices/equipment. Current transformers can be found in generation stations and switching stations. Given below are the most important Current Transformer MCQ Questions Secondary winding rating of Current Transformer […]
The voltage regulation of synchronous generator operating at unity power factor is
The voltage regulation of synchronous generator operating at unity power factor is: Small Negative Zero Small Positive None of these Correct answer: 3. Small positive Explanation: Voltage regulation is mathematically defined as: VR = (Vnl – Vfl)/ Vfl For unity power factor loads, the full load voltage is smaller (but nearly closer to full load voltage) […]
The voltage regulation of synchronous generator operating at a leading power factor is
The voltage regulation of synchronous generator operating at a leading power factor is: Negative Positive Zero None of these Correct answer: 1. Negative Explanation: The basic formula for voltage regulation is: VR = (Vnl – Vfl)/ Vfl For leading power factor the full load voltage (Vfl) is higher than the no-load voltage (Vnl) and thus the […]