1. which type of transformer connection is preferred in case of power supply transformers? (A) Star/Star (B) Delta/Delta (C) Star/Delta (D) Zig Zag/Star 2. In a power transformer usuall which winding is closer to the core? (A) Primary winding (B) Secondary winding (C) Low Voltage winding (D) High Voltage winding 3. The power factor of a purely inductive load is (A) Zero (B) Lagging (C) Leading (D) Unity.

9 Answers   CECRI_Central_Electrical_Research_Institute,

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Explain about p.t?

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why dc series motor has high starting torque

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how to find impedance , mutual indatnce in transmission lines

0 Answers   NTPC,

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New istallation how many eathing have one transformer? Names of earthing connect places?

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how to find insulation resistance of a motor(415v) by theoretical formula??

2 Answers  

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How to test IR testing & magnetic balance test

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why the secondary winding of the transformer is not open circuited ?

5 Answers   Nepal Electricity Authority, Torrent Pharma,

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why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

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why phase to phase voltage is 400v while phase to neutral is 220v?

1 Answers  

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