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 3176

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

13 12841

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

CPCL,

10 7583




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

4 1945

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

L&T,

2 5257

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

3 6049

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 2703

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

Engineers India Limited,

8 9215




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 18453

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

Engineers India Limited,

2 2909

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 2702

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

Bhel, Engineers India Limited, Engineers India,

14 8675

. 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,

1 917

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 1667

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

CDS, Engineers India Limited, TNQ,

760


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Un-Answered Questions { Electrical Engineering }

sir i have a car stereo system and there is jack on him so can u tell me a way to find out their power terminals on the jack or on the circuit board"

594


Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

205


Is it a better option to procure screw type air compressor rather than reciprocating air compressor?If so, what is the reason?How should we select an air compressor(100 CFM)? Please mention the important parameters of air compressor.

701


What is different between Difnit time and instatous over current relay

903


How we can change the direction of rotation of Induction motor? Prove it using graphical

708






If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?

562


how to decide choke rating for drive?

1005


What is servo motor? what is its purpose?

741


how to select automotive wire by mathematical equation with given current, vlotage and resistance

971


What is the unit audit? if our Max demand is something and we found much more unit then how to improve our max demand?

415


Whata are the types of Cables?

699


sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

931


how is control wiring coding is done in a CRP panel ?

689


why chock were used in old tubelights but are not newest tubelights?

503


Why auxiliary transformers are not connected in parallel in primary stations?

161