Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the difference between air & vaccum circuit breakers?

IOCL,

2 5722

What are the components of a substation?

IOCL,

3 5142

What is ELCB?

Bhel, CDS, IOCL,

9 11718

How voltage step down is done?

IOCL,

3 4983

How does a 3 phase induction motor is started?

IOCL,

3 5772

can anyone tel me what is competency of electrical supervisor??

ONGC,

2 3816

minimu size and length of gi earth pipe

2 3956

we have consol make 3 phase servo stabilizer for cnc m/c. while installing the earth neutral voltage is 1.7 volts at stbilizer off condition and when stabilizer get on en voltage reaches 4.8 volts (new earthing is done and neutral is helthy condition all phase to neutral volts 440,442,441 v)why this happen.solution for cause.

3 5537

how to calculate the over current rating of 3phase motor

2 5730

why sec of ct should be kept shorted

Enercon,

2 5217

difference between isolator and circuit breaker?????

Enercon,

7 11278

how to improve IR value in HT motors?

ABB, AMW, Macleods,

3 15923

Why we are using air gap magnetic condutors

Ford, IOCL,

2 5665

I want to know how to calculate the size of electricity cable in building?

DR Engineering Services,

1522

whether Transformer is singly excited or doubly excited machine?

2 7941


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Un-Answered Questions { Electrical Engineering }

how will we calculate the copper wire load..

1438


Why is back emf used for a DC motor? Highlight its significance.

688


Why only sinusoidal ac voltages are generated?why not triangular or sawtooth?

1560


how is working bearing heater?

1552


Why do we use copper cable for HT Supply and why not Aluminium?

1516






what is the difference between capacitive and resistive voltage divider?

2905


What is the function of the generator exciter?

911


How many kw will suply from one db

1062


How do I calculate a WTI CT ofa 1250kVA 6600/400V transformer

1290


what is d check in dg 1500kva

1573


how to synchronize 3 phase slip ring induction motors of different ratings.

1775


what is the stear deltaprinceple?

1394


Why do we use center tap transformer that used with portable tools

1748


In MEP Services what are parts of STP and what are there function?

2923


why r we using shell transformer for low voltage

1531