Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

can we use ac ameter as dc ameter with ct

1 4215

How will you calculate the correct KWH value if your CT is 600/5 and your KWH meter is rated for 100/5

L&T,

1 6462

what is meant by transformer oil temparature

Vijaya Bank,

3 5593

Why don't connect earth wire to elcb?if earth fault occur,how will detect it

TATA, Tata Communications, Telecommunications,

1 4646

if single phase is having 220v supply then why three phase is having 440v instead of 660v?

C&S, NTPC,

4 8547

Fantio of tranformer

Tenon,

2234

What is the basic difference between directional and non directional over current protection?

1 4789

In an electrical power supply,why if neutral phase of a 3phase supply fail over current occur but if it's single phase supply neutral phase fail low current occur?

1 3549

why transformer rating comes in kva?

HNG, Tech Mahindra,

4 8186

I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.

KVF,

2457

exact definition of reactive power in power system

Sreetech,

2 5228

why conductors of low tensile strength 1)produce greater sag and 2)can not be used for larger spans

1 2856

What is multiplying factor of meter if the meter ctr and ptr is open type?

1 5046

We order Dyn 5 distribution transformer to a company. What arrives is Dyn 11. Is it ok to use this transformer. It will be installed alone.

G&S Construction,

3 6312

in transformer input is d.c signal which type of emf is induced

1 4379

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Un-Answered Questions { Electrical Engineering }

State superposition theorem?

1144

which VFD is better ( LT or HT)

2069

we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

2065

What are the functions of temperature scanner in power transformer?

2188

How much of the total hydro power potential has been exploited so far in india?

1120

Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.

1735

To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1922

What is difference between SMC supportg and Glass Fibre Reinforced Plastic Support.

2341

Why negative feedback is preferred in the control system?

1258

draw the full wave and half wave circuit of 3 phase system and inverter circuit used in ups

2397

Why frequency changes due to load variation in power system ? i.e why when load increases frequency decreases?

1909

Can a generator runs after getting 1st stator earth fault.

1409

what is the relationship between phase & neutral

2592

why dc is used in control circuit for mv & hv switchgear instead of ac

1924

can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

2215

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