Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Is it reuired to use house service barcket for 31/2 core 300 Sq.mm cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

HAL,

1 2793

What is Gnat,Ant,Rabbit &Dog overhead conductor? Please explain.

1 8607

Can I do body earthing of machine by using Cable armour or I have to run another GI wire for body earthing and how many wires I need to run. Is there any rule for this. eartnig

HAL,

3 4605

can we use existing 6300V alternator for generating 6600V by increasing excitation,what are advantages & disadvantages to alternator & motors of 6600V.

GMR,

1 3501

can we charge 3 ph power transformer delta-star wound with neutral grounded 6.6kV/415V from secondary side(415V) but with primary(6.6kV) open by dg,what are the disadvantages or losses.

1 2424

why the transformer connected like STAR- STAR, DELTA- DELTA, STAR- DELTA, DELTA-STAR ...? why these connections ,,, explain the advantages these connections?

2571

what is the diff between VCB & ABCB breaker in substaions? explain the operating priciples of VCB & ABCB

1 5471

explain the operating principles of CVT & RVT

2 7405

For a certain load i need 100kw load ,In that case what rating mccb should i use?

5 10769

What are protections for dty type transformers

1357

What is Dry type transformer.How it works

Vatika,

6 14475

Where the Dry type tranformers are used.

5 5717

WHat is the general checks required for Dry type transformers

1629

what is the difference between ACTIVE POWER and REACTIVE POWER.I WANT CLEAR ANSEWER.

8 11094

how we can find out the speed of fan without using any measuring instrument

2 3981


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Un-Answered Questions { Electrical Engineering }

What are the advantages of autotransformer?

737


How 3 phase invertor works?

1472


What difference between ref protection and differential protection ?

1308


Which type of transformer is used for lighting loads?

681


What will be the impact on motor performance if a LT motor is rewound with changed motor winding data as given below:- Original winding data: total 04 wires = 02 wires of 17 SWG + 02 wires of 16.5 SWG. Changed Winding data: total 03 wires of 15.5 SWG wire size Motor rating: 160KW, 740RPM, 415V, ID FAN application. Normal Running Current = 95% of FL Current.

1552






What is CVT and what is relation with wave trap?

1635


1sq mm dc powr cable can carry how much dc currnt

1457


What are the types of transformers according to the arrangement of iron cores?

595


can we use trip light with bus coupler?

1415


why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

1443


why asa method ZPF method is more accurate than ASA method?

5283


How short circuit MVA(Fault MVA) in a power system calculated for calculating number of earth plates ?

1788


List out the different frequency domain specifications?

728


what r the safety measures in UPS ? explain all?

1746


what is breathing?

1309