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 cant we connect the motor output to generator and then generator output to motor ?

4 7331

who invented active elements? plz give me the complte details of active elements...

1843

What is UJT PNP, NPN transistor & working principles?

TATA,

1 12792

what is relation of rpm with Power supply? rpm directly Proposational to power ?

2 6594

How to calculate the Harmonics losses in terms of cost/unit.

2024

how to select the cable size? any formula to calculate cable size?

4 8699

what is the frequency of direct current(dc)?

Cognizant, University,

12 38720

What happen if two protection core (3p) of VT in LAVT are 11kv/root3, 110v/root3 and one protection core (3p) is 11kv/root3, 110v/3

1 5278

What is the difference between single point and double point bonding. please kindly detail about bonding of cables.

2447

I need a formula to calculate the size of cable as per load but in the terms of length. Please Reply me as i search lot of sites but i did not get the answer.

2069

How does the sensitive earth fault protection provided by cbct for motor can help in reducing the size of cable used to supply the motor?

1 3626

How is The split core current transformer working ?

Honeywell, NCC,

1 3727

I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.

2155

What is the difference between bushing and insulators.? what is the creepage distance?

4 40760

In motors how many types of cooling systems were used?

NTPC,

2071

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Un-Answered Questions { Electrical Engineering }

how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

1762

Define bibo stability.

1076

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?

1843

What is different between Difnit time and instatous over current relay

2547

size of condotory fron voltage level

2216

Mention the disadvantages of low power factor?

1130

2 v/500amp/hr to 1.80vpc at 20 degree celsious 2v/5ooamp/hr to 1.75 vpc at 77degree farren .this is the capacity of a battery .what is the meaning of this . can i get a detailed explenation

2302

1 Ton is equal to how many watts?

1101

what is star delta starter? how it works? give its control and power diagram.

2093

When calculating the speed of a rotor required for a particular frequency of synchronous generator we use the equation 60f/p Is this p is the number of pole pairs of rotor & do we consider the number of pole pairs in the stator is 1?

2007

draw vector diagram and +ve,zero sequence diagram of symmetrical three phase fault.

2032

what is 3rd Harmonics? how it is generated in alternator

9484

For a three phase induction motor, what will be the effect on motor if the neutral of the system is shifted to say 20 deg.?

1826

Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

2187

Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

1509

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