Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why number of stator and rotor slots are not equal in IM?

1 3398

if a motor has 1500rpm then what will its HP?

Willdale,

3 4560

what is the physical phenomenon because of which skin effect occurs ??

Power Grid,

6 8958

What happens if the Capacitive Voltage Transformer Primary neutral is not earthed. There is a CVT between Transformer and source, and the CVT neutral of the transformer is not earthed, does it effect the transformer while charging or does it effect the transformer charging process.

1 3419

How to address the servo drive for motor

1453

what is skin effect?

MPSEB,

6 5892

What are the disadvantages of LT AVR over HT AVR?

APTransco, Jindal, TNEB Tamil Nadu Electricity Board,

1 4881

in which base we defined the conductor is Dog type, Squirrel type, rabbit type, wolf type etc used in transmission line?

Bhel, CIL,

3 6620

how to find the ballast lost from the actual wattage? for example i am going to buy decorative type 2x36watts fluorescent light fitting for this lamp how to find the ballast lost? is there any formula?

MEIL,

2 4478

What is oil temprature with A/T contacts in Transformer ?

1 2745

WHICH TYPE OF TRANSFORMER USED IN SWITCHYARD IN POWER PLANT?

GE, Lanco, NTPC,

15 19857

IF alternator SCR value will be high means what happen in alternator efficency at operating power factor of 0.8

3319

what is ten delta test? what is the significanse of it

1 1909

for selection of transformer we will considering 5 to 6 times of starting current of higher rating motor connected to secondary side. according to process wise we will start the motors gradually suppose if we will start 15 to 20 motors at a time wat will happen?

1 2845

why ceiling fan give hising sound

2 3586


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Un-Answered Questions { Electrical Engineering }

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

593


I want to replace the 3 KW DC motor with AC motor so what should be the rating of AC motor? Details Of DC motor to be changed with AC are - Kw - 3, Vf - 310, If - 0.15, Va - 400, Ia - 13, RPM - 2400

1343


If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

557


What is the difference between amorphous core transformer and CRGO core transformer?.

3073


What happens when two positively charged material is placed together?

624






WHY TERTIARY OF POWER TRANSFORMERS IS LOADED WITH EQUIPMENTS LIKE CT,PT,ISOLATOR AND CB

1395


How to check the Bushings of the transformer?

1205


How you calculating the 30 Hp 3 phase AC motor of power what size of cable is used for this motor?

1082


what is the advantages of having in-built acvvvf (without seperate inverter in the control panel)in the drive system of elevators?

2741


sir i had plane to do some project with the base of hopkinson test in AC supply its possible

1297


hi friend i am going too attend for hpcl in this month please help me by sending written test question papers i am in the stream of E.E.E

1453


What is stepper motor. What is its uses?

592


why co incidence factor considered in transformer sizing?

1354


Types of test in Switchgears, MCC, NGR and DB's how it should be procced. Can anyone give me the details here or email me to pasuvaraj.k@gmail.com

1542


Why can't we parallel Voltage transformer secondary circuits?

903