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Electrical Engineering Interview Questions

Is it possible that Generator trip but Turbine not trip.Give explanation.

3486

how can 3phase motor speed can be controlled without vvf drive?

3872

improve power factor by : 1)shunt reactor 2)shunt capacitor 3)series capacitor 4)series reactor

4075

where does core based current transformer is used? and what is the value of lux in a work station?

2789

Does the Impedance of the source affects the THD

2167

what may the reason for vector shift in a generator?

1005

What is DPR relay, And what for??

3965

i have 60Hz motor, can i run it at 50Hz power supply ???

3645

Explain difference between stand by earth fault and residual earth fault protection?

1128

what is difference between ac1 and ac3 contactor and why it is needed to be selected?

14267

How can we define 'Phase'

3740

what is accuracy ? in any meters , coils accuracy . how can u defined that ?

1527

power formula

2425

what mean by power factor

3247

how to maintain ht line?

1108

Un-Answered Questions { Electrical Engineering }

why Y CONNECTION IS BETTER INTERMS OF EFFICIENCY AND P.F FOR A LAOD LESS THAN 40% AND WHY AFTER DELTA IS BETTER FOR > 40%

1066

why the voltage and current in a long transmission line are called travelling wave?

1416

how to calculate the battery AH

1813

what is meant by surge? what we called for high currents?

1092

please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com

1272

What is meant by bus bar protection?

230

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

769

How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.

1324

How much earthing frequency is capable?

1146

How RTCC panel is working and give single line diagram for RTCC with transformer?

2267

what is the difference between online & offline caliberation of KWH meters. Can Digital meters be caliberated

1122

what is deffrence between squirral cage and wound rotor in IM?

1127

A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

1148

explain the what is a drive ? 0 4 which type motor r use in the celling fan..... PCB plannet 2 13 If stator & rotor of a 3-phase induction motor have different no. of poles, will the motor run or not?? types of drives Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only. ACC 1 41 how the 3phase induction motor is running in 2phase supply with help of capacitor? 1 33 what is the actual difference betwen constructional details and constructional features? 1 20 how does commutator convert a.c to d.c?

3741

what is the effect of un-synchronized power.

1133