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Electrical Engineering Interview Questions

when a pure dc signal is sent through a moving iron meter, what will it read?? dc or rms?? when a variable dc signal is sent through a moving iron meter, what will it read?? dc or rms??

GATE,

1462

what is an isolation transformer??? what is its purpose??? what happens if it is not used where it should be used?????

3325

how does the terminal voltage of transmission lines increase when a capacitor is connected???? This happens not only in transmission lines but also in all circuits. How??? When a capacitor is connected in a transmission line, capacitor also takes energy from the same supply. But how is it able to increase the terminal voltage??? Practically What sequence of events happen during increase in voltage???

1110

design of IGBT firing circuit for 11KV

1637

what is the difference between oil surge relay and buchholz relay.

5834

why we use the 100% and 95% stator earth fault protection for the synchronus generator ?

1268

Why 36 KV LA is used in 33 KV Line and 9 KV LA is Used in 11 KV Line

4754

How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?

961

what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.

ME,

1328

Why VCB is required and ACB is also require? what is the BDV of Trafo of 11/33 KV

1876

While testing a ZCT what parameters have to check or measure?

1439

as a electrical student why should i hire you?

TCS,

1545

grr resistance & contrator malt continuous

1118

super position theorem is applicable to

2273

a 120 60 watt incandescent lamp has to be operated from 50 c/sec 1 phase ac supply. in order to do this a circuit element has to be connect in series with the lamp. which one of the following sries element is preferable.

SSC,

2539

Un-Answered Questions { Electrical Engineering }

How to distinguish whether MCB is DC or AC looking at it physically

1123

What is the difference between cylindrical-type and sandwich-type winding?

194

Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?

5545

I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz

1210

I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?

924

Batteries. What is the difference between Lead and Nickel batteries ?

1242

How do i carry out or know the vector group of a Dyn1 and Dyn5 transformer

1107

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

1226

What is electrical grounding?

182

how can we say that stator magnetic field rotates with synchronous speed?can we derive?

881

Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?

1273

What is the lockout relay

628

what happen if field of dc shunt motor opens? what is function of putting res. in parallel to one phase of 3 phase IM? the power supplied by 5A source in circuit is given by------Watt.

1170

explain PV modules in solar energy generation.

996

transformer phasor diagram under load explain it?

1210