EE8301 - Electrical Machines - I - Unit-2 Two marks

Subject Name: Electrical Machines - I

Subject Code: EE8301

B.E. EEE Dept - semester 03

Anna University Regulation 2017 B.E. EEE Dept 3rd semester EE8301(Electrical Machines - I) 2 marks for 2nd unit is provided below. EE8301 all units 2 marks, Electrical Machines - I all units notes & syllabus are listed down for students to utilize it for scoring maximum marks with our study materials.

1.Define leakage inductance or winding inductance.

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2.What material is used in the transformer core ?

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3.What is meant by leakage flux ?

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4.Why transformers rated in kVA instead of kW?

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5.Why is the efficiency of transformers more than that of other rotating machines ?

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6.Define voltage regulation of a transformer.

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7.How can the eddy current loss be reduced ?

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8.What is an ideal transformer ?

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9.State the different losses which occur in a transformer.

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10.What is the application of equivalent circuit of a single phase transformer ?

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11.Mention the properties of oil used in transformer.

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12.Define regulation up and regulation down for a transformer.

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13.How are sledging in transformer oil caused ?

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14.Why is the auto-transformer distribution transformer ?

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15.Give the principle of transformer.

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16.What is transformer ?

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17.What are the advantages of staggering in transformer ?

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18.State the e.m.f. equation of transformer.

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19.How do you reduce leakage flux in a transformer ?

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20.What are no load losses in a two winding transformer and state the reasons for such losses.

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21.What are the functions of transformer oil ?

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22.What is Steinmetz's constant ? Give its value.

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23.List the advantages of stepped core arrangement in a transformer ?

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24.Why are breathers used in transformers ?

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25.Compare two winding transformer and autotransformer.

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26.What happens if DC supply is applied to the transformer ?

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27.What is Inrush current in a transformer ?

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28.State the different connections of three phase transformer.

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29.State the advantages of bank of single phase transformers used as a three phase transformer.

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30.Define all day efficiency of a transformer.

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31.Explain why the wattmeter in O.C. test on transformers reads core loss and that in S.C. test reads copper loss at full load.

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32.Why is the short-circuit test on a transformer performed on HV (High voltage) side ?

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33.Why polarity test has to be done in a transformer ?

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34.Which equivalent circuit prameters can be determined from the open circuit test on a transformer ?

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35.Why all day efficiency is lower than commercial efficiency ?

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Important links:-

EE8301 - Electrical Machines - I - Unit-1 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-2 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-3 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-4 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-5 Two marks (Click here)
EE8301 - Electrical Machines - I - All unit notes (Click here)

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