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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is differance between PT-100 and thermocouple?

1 6980

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

1221

I have a table fan of Rallifan Make. When I overhauled it I found a stator winding and an aluminum die cast rotor. So it is supposed that it is a 1 phase induction motor. But there are only two terminals coming out and there is no capacitor. Can any one tell how this motor works? or which type of this motor is?

1 3176

On the secondary side of a distribution transformer, we use 1c x 630 sq mm cable. Why dont we use 4 core cables instead of 1 core cables on the secondary. Why we use aluminium cable glands on the outgoing instead of brass cable glands?

Siemens,

2 9085

Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?

Jindal,

1528

Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

7 5111

avr is an automayic voltage regulator ... it regulates voltage before it synchronise with grid after synchronisation it regulates power factor why....

7 6132

What is the difference between Off line UPS and Line interruptible UPS?

Etisalat,

1 3435

Do we really need wheels for the transformer

1 2402

Is motor current is dependent on load.

2 3327

how to calculate the current carrying capacity of a conductor. How it is related to diameter of cable or conductor

AGC, BARC,

3 12280

How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?

BARC,

1301

Why only three phase power generation are load are used

BARC,

2 5069

where is the need for short circuit test for 3 see is required and why? can you explain in brief with application

1233

I want to know in body earthing which material can be use either copper plate or GI plate please guide us which is best option.

3 3378


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Un-Answered Questions { Electrical Engineering }

In India the supply voltage is 230 volt A.C. During the negative half cycle phase becomes neutral and neutral become phase? or what will happen during negative half cycle? how the electrons flow during positive and negative half cycle?

1328


what is PDU in transformer?? which company manufacture??

1217


how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?

4464


What are the components of feedback control system?

461


Can anyone explain me about the capacitor calculation

1474






What is meant by short-pitched winding?

497


What is the kiosk parts, about them and their functions ? If anybody have some PDFs files or details about this plz send it on tawhidfaisal@Yahoo.com

1215


Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

1469


Why is the frequency not changed during transformation of electrical energy in a transformer?

591


Why is the air gap between the pole pieces and the armature kept very small?

651


why moisture formation found in XLPE Armoured cable outer sheath

1148


limitation of conductor height on ground when we consider EMC

1306


What is control system?

530


various transmission tower like .,D tower ,K.C.O tower ,C.C.O tower,K.C.R tower ,C.C.R tower ,H.C.O tower in different tons.

2292


Witch do depand of Power factor and theory of power factor?

1495