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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

A 150KW 440V motor is need to replace in the field instead of faulty one. what are the main parameter should I need to check?

1 4276

Why fuse is? What will prevent by fuse?

2 4866

What are the fire Estingushers use in electrical fire?

3 5848

What are the usege & different between UPS & batteries with charging system in in Substation?( UPS 120V AC & battery charger is 120v DC)

1 4210

What are the differents between Breaker & Contactor?

8 62813

What are the main parts of VCB?

12 29703

If a contactor need to replace with faulty one. what I want to check?

Bhel,

2 4312

If the 11 KV supply is fail. what will happened with it's breaker if it is supplay to the 11KV motor?

3 5756

what is the differnce between high impedance relay and low impedance relay

Areva,

4 21607

what is LA CT PT panel?

Dwarikesh Sugar Industries, NTPC,

3 25198

At what load maximum effiecency will be obtained Distribution transformer and Genarating transformer Pls clarify?

4 10970

Why Neutral Busbar CT & transformer neutral CT connected with phase CT in Restricted Earth Fault?

3 18889

how to calculate the surge level of surge suppressors related to the SF6 cicuit breakers?

Crompton Greaves,

1943

What is the basic difference among Circuit breaker,Contractor and Isolator? Are they different names of same device/equipment?

2 11455

how many types method in earth testing?

ONGC,

3 7258

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Un-Answered Questions { Electrical Engineering }

How to minimize the eddy current losses?

1123

which IS or IEC is used for earthing,breakdown voltage of transformer oil, hv/pd testing and all type of electrical testing

2573

WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >

1866

iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

2219

State superposition theorem?

1098

What are the types of excitation system?

1978

Can we use shunt trip coil instead of trip coil with protection relay for protection?

1709

11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter

1891

which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?

2144

what is inverter and converter

1877

1.Can we use 6.6/11KV 300sq mm xlpe 3core cable for LT use (415 Volt). 2. If we use it for LT then what is the current rating

1718

what is static frequency converter?what is the function...of sfc...?

2197

I Need standard operation procedure(SOP)for 500kva Oil type transformer oil filtration & Procedure for IR value checking.

2838

Installation method of self treated earth electrode.

1998

what is dc mator?types of dc motor?losses in dc motor?what is the mechanical,electrical and commercial efficiency of a dc motor?

2041

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