Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is difference between AC VVVF drive & Dc VVVF drive explain their working principle?

Apollo, OPS,

13 33616

why we step up voltage for reducing the loss, even if voltage and current are proportional anr resistance remains same

Sarhad University,

12 18942

how to select earthing conductor size of amy motor/panel etc.

Sony, VBB,

1 7836




How would we calculate the no of earthing pits required for motor /panel

National Engineering Industries, APGenco, Practical Viva Questions,

5 18617

send me the upsc conventional papers of 2006

Siemens, Juniper Networks,

1 1852

what is cogging and crawling

BMRCL, ABB, Siemens, Ashok Leyland, Bharat Bijlee, MN Dastur,

20 66906

for 500mw power production how many range of transformer set in unit please reply if three transformer use .

2 4462

What is power factof?

RRB,

21 12740




What is auto transformer?

US Consulate, ABC, Transformers and Electricals,

28 43635

Why donot sleep below the tree for night time?

12 19462

could mail me the question papers for the test.

ONGC,

1 1959

What is Cement

ACC, L&T, Reliance Cement,

11 11540

why the generating voltage in India is 11kV or why is it be transmitted as multiples of 11

Bhel, ACC, ECI Engineering and Construction, NTPC, Senthur Power Services, SBL,

33 88867

why electric shock due to dc is dangerous than that of ac

44 40058

What is the difference between online ups and offline ups?

NIT, HCL, UBS, GMR, Electrical Tech, Indus Towers, Gravity India, Pyramid, Techno Electric and Engineering,

44 186500


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Un-Answered Questions { Electrical Engineering }

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

595


What is DTR erection?

2447


how is capacitor bank look like

1105


Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

688


please give some hindalco placement papers for written exam

509






does buccholz in a transformer use batteries

2202


What is Control & Relay Panel? And Remote Control Center?

955


how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

653


we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?

198


I have 1500/1A CT If i connect this CT in 6.6KV bus bar means what will be the voltage present in CT?

683


what is the main parts of transformer? how it is functioning? pls giv the ans briefly.

684


What is conventional thermal current (Ith)

1762


what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.

1195


what's the exact magnitude of current, flows through Neutral?

694


What is different type of Electrical curve and how it protects the equipment's while up-normal situation?

598