Electrical Engineering Interview Questions
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Basic motor transformer generator

eCentric Solutions,

140

How to perform a DC resistance test In Alternator and their proceduces?

121

if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

121




what is difference between KW and KVA

174

how to select rating of HT Panel

167

if we have 320KVA Genset kindly advice how much load we can put it.

163

For 35 HP motor how much amount of capacitor should be on in kvr to reduce the current bill

181

Why transformer used in UPS??

JLL,

190




The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

184

if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

180

1hp single phase load = howmuch 3 phase load

129

1.4 What is meant by CT knee point voltage and how would you determine it

180

If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?

107

If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

ABC,

92

i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

69


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Un-Answered Questions { Electrical Engineering }

What is effect on in zone and out zone fault if CT chosen for phase side is Vk/2<5mA and Neutral side is Vk/2<15mA on REF protection of Transformer

1125


What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

766


If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

816


Apparent power is expressed as V * I(Conjugate). Why not in V * I ?

2555


how generator avr give to the input?

653






hi , i have 150 kw loud and we need 50 m cabil,i want to know wich size cabil we use. thanks

744


I HAVE BEEN SELECTED FOR APGENCO A.E(ELECTRICAL) 2008.HOW MUCH WEIGHTAGE FOR INTERVIEW AND WRITTEN TEST.HOW I HAVE TO PREPARE. PLEASE GIVE INFORMATION IF U KNOW.WHAT ABT G.D THIS TIME.CALL RATIO 1:2

1565


what is the method of earthing of a transformer using electrodes?

887


PLS MENTION QUESTIONS ASKED IN IOCL INTERVIEW FOR ELECTRICAL EGG??

1172


I am applying for NTPC examination.Can we please provide previous paper to my mail prasad.chintala108340@gmail.com

992


How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

686


Difference between earthing & grounding.?

696


What is the name of transformers oil filteration equipment?

790


Trafo ratio is 11kV/6.6kv,Vector group is YND11. What will be the effect if secondary is used for earthed system.

2472


What is advantages of VSCF wind electrical system?

942