Electrical interview questions with answers

Electrical Interview questions Part 18

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 08:58:11 PST

Electrical questions:Different between megger and contact resistance meter? Answers:Megger used to measure cable resistance, conductor continuity, phase identification where as contact...

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Electrical Interview questions Part 17

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:05:30 PST

Electrical questions:Which type of oil is used as a transformer oil?Answers:Transformer oil, or insulating oil, is usually a highly-refined mineral oil that is stable at high temperatures and has...

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Electrical Interview questions Part 16

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:07:43 PST

Electrical questions:What are Motor Generator Sets and explain the different ways the motor generator set can be used ? Answer:Motor Generator Sets are a combination of an electrical generator...

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Electrical Interview questions Part 15

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:08:38 PST

Electrical question:Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?Answer:4-20 mA is a standard range used to indicate measured values for any process. The reason that...

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Electrical Interview questions Part 14

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:09:16 PST

Electrical question:How do you select a cable size (Cu & Al) for a particular load? Answer:At first calculate the electrical current of the load, after that derate the electrical current...

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Electrical Interview questions Part 13

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:09:50 PST

Electrical question:How electrical power is generated by an A.C Generator? Answer:For the generation of elect power we need a prime mover which supplies mechanical power input to the alternator,...

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Electrical Inteview questions Part 12

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:10:32 PST

Electrical question:What is meant by regenerative braking?Answer:When the supply is cutt off for a running motor, it still continue running due to inertia. In order to stop it quickly we place a...

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Electrical Interview questions Part 11

noreply@blogger.com (Siva kumar.T.A) — Sun, 22 Jan 2012 09:11:01 PST

Electrical question: Why we do 2 types of earthing on transformer (ie:)body earthing & neutral earthing , what is function. i am going to install a 5oo kva transformer & 380 kva DG set what...

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Electrical Interview questions Part 10

noreply@blogger.com (Siva kumar.T.A) — Fri, 06 May 2011 10:24:28 PDT

Electrical interview question:What is the difference between Isolator and Circuit Breaker?Answer:Isolator is a off load device which is used for isolating the downstream circuits from upstream...

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Electrical Interview questions Part 9

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:24:04 PST

Electrical interview question:how to calculate capacitor bank value to maintain unity power factor with some suitable example?Answer:KVAR= KW(TAN(COS(-1)#e)- TAN(COS(-1)#d) )#e= EXISTING P.F.#d=...

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Electrical Interview questions Part 8

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:23:09 PST

Electrical interview question:What happens if i connect a capacitor to a generator load?Answer:Connecting a capacitor across a generator always improves powerfactor,but it will help depends up on the...

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Electrical Interview questions Part 7

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:42:15 PST

Electrical interview question:What is Automatic Voltage regulator(AVR)?Answer:AVR is an abbreviation for Automatic Voltage Regulator.It is important part in Synchronous Generators, it controls...

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Electrical Interview questions Part 6

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:25:13 PST

Electrical interview question:Why syn. generators r used for the production of electricity?Answer:synchronous machines have capability to work on different power factor(or saydifferent imaginary...

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Electrical Interview questions Part 5

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:27:40 PST

Electrical interview question:Give two basic speed control scheme of DC shunt motor?Answer:1. By using flux control method:in this method a rheostat is connected across the field winding to control...

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Electrical Interview questions Part 4

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:28:10 PST

Electrical interview question:What will happen when power factor is leading in distribution of power?Answer:If their is high power factor, i.e if the power factor is close to one:1.losses in form of...

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noreply@blogger.com (Siva kumar.T.A) — Tue, 08 Mar 2011 10:28:13 PST

What information do we collect? We collect information from you when you subscribe to our newsletter. When ordering or registering on our site, as appropriate, you may be asked to enter your:...

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Electrical Interview questions Part 3

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:44:37 PST

Electrical interview question:why, when birds sit on transmission lines or current wires doesn't get shock? Answer:Its true that if birds touch the single one line (phase or neutral) they don't get...

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Electrical Interview questions Part 2

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:32:29 PST

Electrical interview question:How tube light circuit is connected and how it works?Answer:A choke is connected in one end of the tube light and a starter is in series with the circuit. When supply is...

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Electrical Interview questions Part 1

noreply@blogger.com (Siva kumar.T.A) — Mon, 15 Feb 2010 14:36:07 PST

Electrical interview question:What is electric traction?Answer:Traction means using the electric power for traction system i.e. for railways,trams, trolleys etc. electric traction means use of the...

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