Electrical Engineering Interview Questions
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If the characteristic Impedance is equal to load Impedance then…… a) voltage will be increased b) power transmission is zero c) …… d) max. power is transmission to load

2 3243

The normal highest generated voltage in India is a) 6.6KV b) 132KV c) 11KV

13 13210

The corona effect is more in a) summer b) winter c) dry weather d) humidity weather

CPCL,

10 7875




ynchronous M/C with under excitation with reactive power absorption , acts as a) synch. Motor b) synch gen c) synchr capacit

4 2007

Why size of HT cable is less then LT cable inspite of the fact that voltage is higher in HT cable?

L&T,

2 5331

How will I know that how many batteries I should connect to my UPS unit?

3 6141

A 25MVA 3300/400V T/F is termed as per winding is …… a) primary 3300V & Secondary 400V b) primary 3300V & low voltage winding 400V c) High voltage winding 3300V & Secondary 400V d) High voltage winding 3300V & low voltage winding 400V

Engineers India Limited,

4 2771

Buchholz relay is used ………. a) protection T/F b) oil T/F c) Air core T/F

Engineers India Limited,

8 9431




Resistor switching is used in which type Circuit Breaker ? a) oil filled CB b) Air blast CB c) Gas filled CB

Engineers India Limited, wbsedcl,

11 18859

In EHV tranm. The conductors are …….. a) Cu roads b) Cu bars with Si c) Cu tube with Si plate

Engineers India Limited,

2 2966

the max. power will be transferred if …… a) sending end vol. is high b) receiving end v is high c)…….. d) corona loss is least

Engineers India Limited,

2 2765

Moving Iron instruments are applicable with a) DC only b) AC only c) DC & AC

Bhel, Engineers India Limited, Engineers India,

14 8812

. The string effcy in AC sys is 80% Then for same power, the string effcy in dc sys is a) less than 80% b) 80% c) more than 80% d) zero

Engineers India Limited,

1 972

The temperature rise in the sys, which leads to ….. a) Increases stress& length b) increases stress but decreases length c) Decreases stress & increase length d) decrease stress & length

Engineers India Limited,

1 1734

According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor

CDS, Engineers India Limited, TNQ,

785


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Un-Answered Questions { Electrical Engineering }

by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.

741


why single CT used in DOL starter power circuit?

1084


WHaT IS THE CONCEPT OF INDUCTION LAMPS IN MODERN LIGHTINGS, and HOW IT WORKS TO EMIT LIGHT ( AS NO ELECTRODES ARE PRESENT ) ?" COULD INDUCTION LAMPS CAUSE INTERFERENCE WITH COMUNICATIONS INTO A STORE USING INDUCTION LIGHTING ? WHAT IS THE BENEFIT OF USING THE LOW FREQENCY INDUCTION LAMP , VERSUS LED , AND VERSUS FLUORESCENT, AND VERSUS ANOTHER KIND OF LIGHTING . THANK yOU MOISES GUINDI

759


Tell me the reason of connecting domestic t/f primary in star or delta,and also secondary side.

708


Why slip ring ind. motor power consumption is low compare to induction motor .same 90 kw motor used same load output

476






What happen when change order of CT in GIS feeder?

202


why power factor is important?

4805


How to do maintenance of transformer feeder.

509


List of equipments required foe industrial repair lab.

670


What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

208


WHAT ARE THE DATAS REQUIRED FOR PROTECTION AND METERING AND CONTROL AND LOGIC PREPARATION,HOW TO STUDY THE PROTECTION AND METERING?

758


how can you calculate fault level ?

1125


upto how many load can v connect to stabilizer which is used for tv

1001


WHY DO VOLTAGE TRANSFORMERS FAIL DURING EARTH FAULT IN THE DELTA CONNECTED 6.6KV ELECTRICAL SYSTEM

727


list of tests to be carried out at manufacturers end while purchasing a step up transformer of 11kv to 66kv ,2MVa Capacity.

720