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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why do we twist copper to make cable?

Bhel, Integrated, MR Cables,

3 3657

CPC cable .PVC \1C....I want to get sure that type is flexible indoor or to be install on trench. please advice .thanx :)

932

why the conservater tank alwes made upper side of transformer???

3 3019

what is the criteria for selecting fuse rating in 1phase, 2phase & 3phase welding sets?

923

can anyone provide me a amf panel control wiring using ec-2 relay?

Electro Tech,

1237

why the projects getting loss?

SBPL,

928

what are the method of testing of transformer??

NCC,

2 2903

What is SF6 Circuit Breaker?

Amdocs,

2 3179

why we use circuit breakers for switching instead of normal switching device?

966

what is diffrent between plc and clc??

1 3171

why we cannot protect 100% winding of an alternator by using differential protection?

1201

How to control the dc motor in ac supply without thyristor circuit?

2 3057

what is the acceptable limit value for Desolve Gas Analysis/

1003

which signal we found accurate reading of analog signal or degital signal and why?

1 1717

what is the k var ratting of 1250kva

1035


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Un-Answered Questions { Electrical Engineering }

Draw a block diagramof Three UPS systems connected in Parallel mode?

1128


Can anybody inform me about the pattern of ECIL GET( Graduate Engineers Trainee) interview for Electrical students? Will there be HR round as well? I thought of preparing for 2 to 3 subjects thoroughly. Will it be sufficient? Please share your thoughts.

1264


what is the synchronous timer ? and it applications.

1408


what is the difference betweem star connected motor & delta connected motor?

1430


if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required

1518






The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input

1355


how to determine the inrush current of a transformer

1627


what is feed back and what are feed back amplifiers?

155


HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????

1114


some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?

872


A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.

1127


1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

1029


HOW TO CALCULATE HV CABLE SIZING?

2025


R=*¶ l/a

719


What is minimum phase system?

152