Electrical Engineering Interview Questions

what should be the ideal gauge of wire (In sq mm) for different loads in Ampere?

218

write down the formula of cable size in RM if current is 50Amp.

168

What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

177

my question is how to answer the question "you are from b.tech eee background and why do you want to go for banking

147

what is feeder bay?

291

What is difference between insulating medium and fault current interruption medium in a switching device.

318

What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor

Viva,

241

what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.

208

11 kv input, 66 kv input advantages

175

What is CCM in Electrical ? where can we use this material?

187

for what purpose the star point is done in ct

213

can we install LT panel & HT panel in one room?

361

can we install HT panel & LT panel side by side or how much clearance is required ?

245

what is resver in electrical enginnering with answer

284

surge tank, hrc fuse, earthing transformer, firm power objective type

228

Un-Answered Questions { Electrical Engineering }

what kind of quetions will ask in BHEL in interview? Plz help me?

842

FOR 16/20 MVA 132/33 KV ONAN/ONAF TYPE TRANSFORMER IT IS DESIGNED FOR 16 MVA WITH ONAN CONDITION.IT BECOMES 20 MVA UNDER ONAF CONDITION.LOAD LOSS IS GUARANTEED FOR 65KW AT 20 MVA AND % IMPEDANCE 13.75. PLEASE TELL US AT WHAT LOAD LOSS AND % IMPEDANCE IT SHOULD BE DESIGNED FOR 16 MVA AND WHAT WILL BE ITS EFFICIENCY AT 20 MVA?

2048

Distinguish between nuclear power station with thermal power station for initial cost, starting period, cleanliness, and transportation of fuel

803

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

788

How many types of interlocking use in screw type air compressor,make-Kaser(BSD MODEL)?

802

what is the string efficiency

3391

If i=10+10sin314t then find the rms and average value of current with explain?

2846

please send the last 5 years {{{JUNIOR ENGINEER - ELECTICAL, ELECTRONICS RRB CHENNAI and secundrabad}}} TECHNICAL question papers TO MY EMAIL ID dinesh100701@gmail.com

929

How do we calculate the resistance per metre of single core aluminium stranded cable 19*3.25mm sheathed in pvc,at 15 deg C temperature?

1110

how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

822

how to work droop ct in generating station

1209

How will calculate losses in an multi core Aluminium LT cable of different sizes & upto what length we can use a LT Cable ?

963

what is difference between bus coupler and auto transfer switch

472

why fractional pitch winding generally used in alternators?

1603

A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.

980