Electrical Engineering Interview Questions

in most industies hormonics present up to some level. what is limit ? and there effect?

Bhel,

4179

how we calculate size of exciter(excit. volt and current) for generator?

4155

what happens if generator is running leading power facotor?

10798

If the supply voltage is same (say 440V) whether a system designed for 60 Hz frequency will work with 50 Hz frequency or not , if so pl. give clarification.

ABB,

8567

why generaters need four earthings

4559

how many earthing required for ups, what should be the earth voltages

16347

what is transformer

42494

i need online ups battery calculater

2500

In domestic supply, when neutral touches earth the earth leakage trips. Does this mean that if the star (neutral) point of an alternator is earthed that power will flow to earth i.e. a direct short to earth?

4063

How one can check the faulty capacitor, diode when connected in the circuit ? and when you can not take them out ?

6692

What is the Difference Between MCCB & ACB & VCB

254821

what is dc voltage?

2947

HOW TO CALCULATE THE CABLE SIZE FOR POWER CABLE, CONTROL CABLE AND INSTRUMENT CABLE

5274

In a 3 phase squirrel cage induction motor why does rotor rotate? will 3 phase transformer rotate like a motor if it is placed on bearings and powered up? give reason

19442

WHAT DRESS I SHOULD WEAR WHILE ATTENDING AN INTERVIEW? PLEASE SPECIFY THE STYLE AND COLOUR. CAN A LADY WEAR CHUDIDAR FOR AN INTERVIEW?

9795

Un-Answered Questions { Electrical Engineering }

what is the relationship between current&voltage in practical purpose ?

2927

Sir pl provide 5 year sample paper for post junior engineer(electrical).I have currently applied for junior engineer (electrical) on RRB Ajmer

2392

aternator every parts and its working

281

what is integrated ac contact circuit

729

Why the moulded plug comes with domestic appliances instead of assembled plug like anchor, Vinay 5/15 A.

837

What is the formula to calculate the rating of a three phase miniature circuit breaker

830

How to measure size of cable on a given load

608

what is the prinsiple of dc motor and construction and working ,application of dc motor.

658

Can I use star delta connected induction motor for dual supply voltage?

777

Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

788

explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.

1195

what is the meaning of impedance protected in instrument cooling fan

1476

Pl.brief me about Electrical power distribution system from Main generating station to Industry.What is the use of in between station.

810

i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.

700

What is the accepted limit to increase the choosen transformer capacity over the load and why ?

1635