Electrical Engineering Interview Questions

what is form factor.and rms value..

2318

WHY ARE THE LT GENERATORS SOLIDLY EARTHED WHILE THE HT GENERATORS ARE EARTHE THROUGH NGR OR NGT??

4720

what is the maintaining Cf in UPS.

941

how to design domestic earthing pit and earthing wiring?

4926

placing earthing pit in pathway is correct or wrong??. placing earthing wireGI1/18 inside walls is correct or wrong?. explain!!!

680

why induction motor always operate at lagging p.f.?

6833

if we give DC suply to the AC motor what hapen

TATA,

4423

Why Indian Electricity frequency desined 50 Cycles as developed countrys are using high frequency with low voltage

2978

what is the use of spherical metal balls attached on to the earth wire of transmission over head lines?

2417

what is the function of an auto reclosure relay in OHL?

2955

why transformer capacity is called KVA and motor capacity is called HP/KW? Why transformer capacity cant call HP/KVA?

7996

what happens when back feeding supply accidently collapses with normal supply ??? How?? [that is sometimes in a substation 11kv feeder if their ws long time permit work, back feeding supply will provide from nearest substation... if accidently after the permit work,they charged the feeder without removing back feeding wat will happen...?]

KSEB,

2592

Difference between low impedance and high impedance Restricted Earth Fault

1684

Differentiate between Low and High impedance Protection

2101

Differentiate between Zero and Negative sequence current

707

Un-Answered Questions { Electrical Engineering }

what is the id1 & id2 setting in differential protection relay of CSPC?

1290

How can claculate to attain the desired PF in the line ( HOW Much KVAR is required ) Pls Give the formula? Equate Petrochemical 0 1 how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec. 0 1 What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding? Equate Petrochemical 0 1 What is required of exietation to the alternater. 0 1 why star point of HT motor not earthed? Equate Petrochemical 0 1 Why we are getting low voltage in star connection? Equate Petrochemical 0 2 What's ND relay & it's functions? Equate Petrochemical 0 2 How instantanious short circuit current is calculated? its formula? Equate Petrochemical 0 2 What is servo Motor? What's the advantages of this motor over Induction motor? Equate Petrochemical 0 2 What is core CT & it's function? Equate Petrochemical 0 3 what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY L & T 0 4 What is required of exietation to the alternater. KNB 1 23 what is the design voltage for 6.6KV 2000 KVAR HT capacitor? Consultancy 0 3 Pls explain about vfd control?Where it is used, Give some example? siemens 1 22 Please explain me abt PQ diagaram in the power sector. 0 9

762

The knee point of a current transformer is normally unique and known.So why in the nameplate of a CT they put the minimum value like this Vk> 400v.

154

Define Electrical Insulation and examples of Solid,Liquid and Gaseous insulating materials?

482

define the active power?

730

CAN CU XLPE/PVC CABLE BE USED INPLACE OF LOW NOISE SCREENED CABLE? KINDLY GIVE REASONS

657

i am electrical and elctronics engg passed out in 2009 want to attend for reliance placements.plz send me apttitude ,technical and hr question answers to my mail plz. my mail id-kat.bindas@gmail.com

668

can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

937

PLZ SEND ME SOME UNIQUE PROJECT OF ELECTRICAL ENG (B.TECH)

754

Why PT voltages are measured with respect to ground? What do u mean by voltage or current polarized.

1092

how can you calculate fault level ?

1157

1.what is mean by 8/20 micro sec waveshape

875

what are the difference between PLC and embedded

886

A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

187

What current position are you holding in your current company?

823