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 AC voltage source are generate as 50 Hz ?

4 6596

What will happen if induction motor is supplied with capacitive load?

NTPC,

1 5393

how we identify between current transformer and potential transformer without having it name plate?

L&T, TATA,

5 12816

Please give the formula for converting from 1 tr refrigeration to kw.

Bugema University,

2 4631

what is settable hystersis protection? If any body knows plz kindly post the answer..

2052

what is the formula for computing cable tray size & capacity

2166

what clearance required for 4.5 mva dry type transformer?

SPS,

2031

how to calculate lighting for a room

Coca Cola,

2 7696

How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

2148

A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

1 3414

method to check earthing

ECC,

5 11850

why slipring motor , at full speed run as squirrel cage motor?

1 4139

I have running 4 generator in paralel.All generators Voltages is same(470 V),KW also same (100 KW) but only No2 generator Amper is high than another generators. DG No:1,3,4 470V,100KW, 150 A DG No:2 470V,100KW,400 A

4 5603

What is the permissible value of earth resistance and as per which standard / act / rule ?

HBL Power Systems,

3 7098

The loads are connected with phase and ground then why current flow as the loads ?

1966

Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

what are the industrail measures to over ferranti effect? how would the ferranti effect the power system if those remedial mearsure arent taken? how often does this effect occurs in real power system?

2145

What is mean 2XWY

2490

How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

1617

1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?

1890

What are the weight of 800KV DA,DB and DC type tower ?

3146

how many types are their in switchyard or substation(like D,I TYPE), what is differant between them

2112

Draw torque - speed curve and load curve of induction motor? mark operating point ?

2056

Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?

2443

what is an unbalance in acircuit? in a three phase 3wire circuit how an unbalance will come? in a three phase four wire system how an un balance is coming?

1841

At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

2031

Witch do depand of Power factor and theory of power factor?

2094

What is BusBar integrity test and how it is conducted?

2258

what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

4329

what is the minimum requirement gigaohms for the insulation test using 5kv in 300mm xlpe cable

1978

what are the advantage and dis-advantage of 3 phase 4 wire energy meter?

2189

For More Un-Answered { Electrical Engineering } Questions Click Here