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Electrical Engineering Interview Questions
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What is the difference between hot and cold loop testing?

 663

L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

 663

What is the effect of electric motor stuck in star configuration,

 678

how the aircraft outer body and inner body is separated ?

 624

how the inner and outer body is separated in aircrafts?

 589

Why we use d.c. meger in a.c. induction motor?

 1 9320

What happens to a motor if it is connected in Delta connection

 563

75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

 3259

what is the range of maximum DOL and SDS can be use for pump and fan application

 626

What is the difference between DOL starter and star delta starter

 567

electrical knowelge

 730

What is resistance reading of earth copper rod with grid and without grid?

 640

A 230 v dc series motor is connected to 230 V ac supply, then

 1 1123

What is various types of electrical formula?

 1 1028

How many gap between finger contact in a.c.b. and v.cb.?

 736

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Un-Answered Questions { Electrical Engineering }

1) why a dg set shows variation of power factor and load when synchronised with other dgs? 2)Why the load sharing is not become equal in all dgs?. 3)When a dg set will not run on auto start?

1529

11000volt DG set carnt kaise banvay

1222

What happens to a motor if it is connected in Delta connection

563

How REF protects transformer alone? explain with diagram.

1004

CT Ratio of a energy meter connection is Red Phase : 100/5A, yello Phase : 50/5A & Blue phase : 100/5 A what is the overall Multiplication factor

1196




What is given by the definition in BIL IMP/PF = 950/395 kV. This was found in a name plate of a power transformer.

1838

A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

1583

I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

1207

why the name trunking bus PT

2484

What is meant by positive and negative feedback?

622

why do we use 25kv supply for traction purpose?

1504

Where should the lighting arrestor be placed in distribution lines?

662

how much maximum load a 2 core (Single phase) 16mm aluminium wire can take ?

2183

A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1512

What is difference between slip rings and carbon burushes?

13894

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