Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Why Ferranti effect not occurs at full load?

L&T,

4 23255

how to identify the direction flow of electrons in a conductor? if i want to check the sequence in kv lines, is any device is available?

3 6052

What is the importance of creepage distance in disc insulator ?

1 12821

As we know that during saturation test of CT from secondary side, the current in secondary shoots up after core saturation. How core saturation effects the secondary current?

2 4603

Why secondary of a CT in a power system acts as an open circuit after core saturation?

2 5704

which motor is used in mixies

10 24134

the minimum clearance b/w ceiling and plane of leaf of ceilng fan shall be ..........mm

1 3921

why anti pumping relay is not given to tripping coil of the breaker? why only to closing coil?

INEL, Siemens,

2 6132

how to build a network which step down 415v to 1v rms

1996

how to calculate the bus-bar size. give formula with description

1 6033

what is single turn and multiturn encoder ? Can single turn encoder be used to show rpm of a motor(on shaft) ? Plz explain in brief .abanirout@gmail.com

1 3983

Can we use a absolute encoder to show rpm of a motor ? what about the condition when power is off ? what is difference if a incremental one is used ?abanirout@gmail.com

2031

Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?

2 5877

what happens when current(ac or dc)flowing through a boucket of water?please describe it.

3 7429

two bolbs of 100w and 40w respectively connected in series across a 230v supply.which bolb will glow bright and why?

DRDO, PSPCL, Siemens,

16 63263

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Un-Answered Questions { Electrical Engineering }

what is meant by class 1 E in electrical power supply?

2115

what is the difference between RMS & TRUE RMS VOLTAGE

2953

explain safety measures in alternator?

1784

WHY RATING OF VCB NOT LESS THAN 630A

2622

What types domain of laplace transforms? What behavior can laplace transform predict how the system work?

1145

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

1961

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

1952

In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

808

If 100 KAV USP dedicated earth got disconnect / Cut. What will happen at load.

1970

From past few months I am getting lagging pf even though sufficient capacitors used in circuit. Where is the problem pls answer

1441

WHY IL=IPH IN STAR AND WHY IPH=IL/1.732 IN DELTA? WHAT IS REASON BEHIND IT?

6359

how can you size an automatic voltage regulator?

2355

why a tester wont shock while testing the power in house

1854

How we calculate the size of ht cable for any transformer

2086

What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

1875

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