Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the difference between series and shunt compensation using facts in a transmission line

42946

Suppose i Have an Ac motor of 25Hp 1500 Rpm 50 Hz Can i run a motor 2500 Rpm by AC drives by increasing a frequency either it safe or not ....

3253

what is the use of Reactive power

4576

1 KVAR = 1.3Amps but, 25KVAR capacitor/690V capacitor takes just 21Amps as leading current, what is the reason? Please explain...

7256

why we are 0.8 power factor only?

3696

You are given 220 V supply source, four wires, an ammeter and voltmeter. There is no any indication or description on meters. How will you identify which is ammeter or voltmeter?

ABB,

8778

If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.

MEIL,

1460

What is a soft start?

3779

IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE DIFFERENCE BETWEEN OVER HEAD AND UNDER GROUND LAYING THE CABLES

12517

How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

1462

what are the insulation properties.

4764

what is mean by transition resistance of transformer?

3950

X is a uniformly distributed random variable that takes values betweeen 0 and 1.The value of E {X3}(x cube) will be.

GATE,

2646

If the rank of a (5x6)matrix Q is 4, then which one of the following statements is correct ?

GATE,

3740

An input device is interfaced with Intel 8085A microprocessor as memory mapped I/O.The address of the device is 2500H.In order to input data from the device to accumulator,the sequence of instruction will be

GATE,

5700

Un-Answered Questions { Electrical Engineering }

how to decide no of electrodes for 1600A LT Main incomer panel

1163

R=*ΒΆ l/a

1152

What is a difference between indoor transformer and outdoor transformer of same rating

5190

in 1-phase 230v,how in 3-phase 440v. in each phase in between 230v.

2347

define as synchronous generator

1678

how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?

2214

What do you mean by dependent and independent voltage sources?

594

Can u tell me design of switch yard

1680

how to deside the capacity of chock for drive?

1613

Define piezo-electric effect?

693

slipring induction motor starting time Lrs operating why lrs starting time lrs outer body didn't get shock

1458

temp of cast resin 1500kva tx formerwent up to 138.c but came down very fast to about 100.c within 20 mins when load was reduced from 70% to 60%

1480

What would cause a 240v choke that should give 110v out on a 16w lamp to gradually increase to 160v?

1738

How many kw will suply from one db

1063

how to avoid electrical shock how capacitor store charges wat are the speed control of induction motors state faradays law flemings left hand rule what is rotary converter wat is transmission and distribution what are the sources of energy abrevation of acb,vcb,sf6,igbt what is output equation of transformer which test copper iron and iron loss are calculated what is eddy current draw a single line diagram (10 marks) draw direct online starter(10 marks)

1436