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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is running ,how?

5 4652

differentiate between remote backup relay and local backup relay?

1 2967

1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

IES,

2 2958

CAN 50Hz transformer work at 60 Hz power supply? if yes how it is possible?

2 5303

type of transformer

3 3081

what is the principle of servo motor

2 3693

pls send me some question and answer for rrb railway interviw related 2010

CEAT, RRB,

2 3320

IAM WORKING IN THERMAL POWER PLANT AS A TRAINEE.. I WANT TO IMPROVE MY CARRIER., IF ANYBODY KNOWS ANY COURSES., ANY TESTS, ANY BOOKS ,, ANYTHING PLS HELP ME..

2 3869

Re: What do you mean by Power factor of a generator? Power factor purely depends on the load (wether inductive, reactive or unity) then what does the Power factor mentioned on the generator nameplate means?

2 3754

Genreally distribution transformers are having Star/delta connections to provide phase and neutral to the consumers. Is the neutral of the star conncted secondary grounded in these transformers?

1 2263

why co incidence factor considered in transformer sizing?

960

why the genearation of electricity always in form of sine wave only ??? why not cosine wave ???

1 2802

what is the meaning of Air condition "TON"

3 8412

why is efficiency of transformer more than that of other rotating machines?

1 3444

what is load which is indicated in power plant generation panel? in any power plant

1 2368


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Un-Answered Questions { Electrical Engineering }

If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?

1174


Is potential difference materials property ..? if yes tnen how.. explain brifly.

985


What is state space method ? Why its used ? Can it applicable on linear, non-linear, 1st order, higher order, homogeneous, non-homogeneous, open-loop , closed loops , stable & unstable systems ?

1148


our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

1197


FEINGING DECREASES THE FLUX DENSITY IN THE AIR GAP. HOW?

1100






what is the responsibility of C license holder in industry?

5698


if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to improve a power factor is secondary should kept negative to improve it primary side means is -.90 became +.90 at other side

982


at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

909


i have 3500 amp load and select current transformer and perches.how i calculate .please understand

1246


Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?

1608


Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.

846


In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

1230


What is an 86-P or an 86-A trip

1022


How can we calculate the efficiency of a Running (On-Load) Motor ? What parameters are required and what is the method ?

1080


Where burned of electricity,when,who, & why.

1033