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Electrical Engineering Interview Questions

230v 1 phase Phase and Neutral insert in Bulk water what happens.

2381

what is the safety points of vaccum circuit breaker.

1144

what are protective device needed to power a 360W ,50hz,240v,single phase,0.65 pf universal motor

L&T,

2700

in magnetic field we send current to generate flux,why not voltage?

2202

IF TVM OF TRANSFORMER SHOWS POWER FACTOR ON 33 KV SIDE AS 0.97 LAGGING AND ON 132 KV SIDE IS 0.75 LEADING.IS THIS CORRECT.WHERE IS PROBLEM.

1325

how to convert 1 phase power to 3phase power by using induction motor. . . .

2381

what is the difference between high impedance and low impedance circuit?

3358

How much earthing require for h.t.22 k.v. cable in coming side & out going & 22 lighting arrest or,22 k.v.D.o. & A.B. switch.

1212

What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.

1040

How cable from Kit-Kat to main switch, from starter to motor are designed?

1100

FULL FORM OF MCCB

3624

explain wiring system

1555

why in a swquence network representation, the negetive sequence generated voltage is taken as zero?

957

why battery dc voltage become Half when we check with respect to ground for example 120volts + and - terminals and when we check + terminal with Earth thats 60volts why 60volts we can not ground the battery.

GE,

11728

wat is meant by PX class in ct?

1053

Un-Answered Questions { Electrical Engineering }

draw 3 phase rectifier diagram

1139

What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks

1048

how many types are their in switchyard or substation(like D,I TYPE), what is differant between them

1157

Why we do 2 types of earthing on transformer (ie:)body earthing & neutral earthing , what is function. I am going to install a oo kva transformer & 380 kva dg set what should the earthing value?

179

What is the function of capacitor in electrical circuits?

166

why any centrifugal blower draw more current in starting. consider id fan and fd fan?

881

What is core CT & it's function?

1088

Leakage current,un balance current which relay using for high voltage transmission?

1194

Difference between transition and diffusion capacitance

1605

i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

1125

What is the resistance of the field winding of a d.c. Shunt generator kept low?

161

what is tower earthing and what for it is required

1116

Basic motor transformer generator

432

what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?

974

we have earthmat at 110KV substation.we would like to take earth resistance.b some says that by connecting earth megger terminals (C1,P1) at middile point of earthmat (at riser) will cause voltage gradient at other earthmat nods and dont get exat earth resistance.when connecting at end nods will get exat value . is it correct .please explain

1168