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Latest Electrical Motors Questions and Answers

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How do the new IE efficiency classes compare with the old EFF efficiency classes? The new IS: 12615-2011 defines the following efficiency classes of low-voltage three phase asynchronous motors in

Electrical Machines Objective Questions

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Electrical Machines Questions & Answers 1. Magnetic Circuits Principle of Energy Conversion Excited Magnetic Systems 2. Basic Concepts in Rotating Machines Reluctance Motor Doubly Excited Magnetic Systems Elementary Synchronous Machines

Electrical Machines Questions and Answers

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Lap winding is suitable for high current and low voltage generators while wave winding is suitable for high voltage and low current generators. >Lap winding is suitable for high current

Induction Motor Interview Questions Answers

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What are the advantages and disadvantages of Induction Motors? Advantages: It is simple and rugged in construction It is relatively cheap Induction motors require less maintenance Induction motor has high

Electrical Machines Short Answers

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1. Why almost all large size Synchronous machines are constructed with rotating field system type? The following are the principal advantages of the rotating field system type construction of Synchronous

Questions and Answers in Electrical Machines

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[1] What is an ideal transformer? The ideal transformer should have the following properties: It has no losses Its windings have zero resistance It should have zero leakage flux (100%

Electrical Machines Interview Questions and Answers

S Bharadwaj Reddy
[1] Why is the efficiency of a three-phase Induction Motor is less than that of a three-phase Transformer?  Three phase Induction motor is nothing but a rotating transformer. Due to

Interview Questions on Transmission & Distribution

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Why is alternating current used for transmission? AC is used for transmission because transformers can step it up to high voltage for long distance, and down to low voltage for


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Transformers Questions & Answers Autotransformers  

Three Phase Transformers

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Transformers Questions & Answers Three Phase Transformers    

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