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 4345

Why fuse is? What will prevent by fuse?

2 4958

What are the fire Estingushers use in electrical fire?

3 5972

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

1 4270

What are the differents between Breaker & Contactor?

8 63095

What are the main parts of VCB?

12 30083

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

Bhel,

2 4405

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

3 5845

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

Areva,

4 21778

what is LA CT PT panel?

Dwarikesh Sugar Industries, NTPC,

3 25354

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

4 11123

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

3 19009

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

Crompton Greaves,

1973

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

2 11543

how many types method in earth testing?

ONGC,

3 7375

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Un-Answered Questions { Electrical Engineering }

How much should be the load percentage for 15kva Inverter and Iinut & I output load with Calculations

2114

What’s electric traction?

1142

How LT megger works ?

2132

What is Auto Mains Failure Panel & Auto Synchronizing Panel

1943

what happen when power factor of 2 parallely operated transformer become equle?

2208

what is the affect of earth's magnetic field on the frequency used in aircraft???

2010

How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.

2197

Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in

4730

Suppose a 3 phase, 2 pole, 440V induction motor is driving a flywheel of 600mm diameter, 150kg mass. By using v-belt and pulley, the speed is increased to 4500 RPM. What will be the effect on motor current?

1400

What are the limitations of Kirchoff's laws?

1591

Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB

2736

why zero sequence impedance measurement is not applicable for single phase GT

2199

PLEASE ANYBODY HAVE ELECTRICAL CIRCUIT DIAGRAM FOR CHMER PULSE CD 60M SPARKING MACHINE.PLEASE MAIL ME SUPRIYAAYYAPPAN@YAHOO.CO.IN.

2804

What is relation between mu(nought) and epsilon(nought)?

1536

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

1287

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