Electrical Engineering Interview Questions
Questions Answers Views Company eMail

we want low electricity at lower speed of fan.what we have to do?

5 5089

only some transformers and some generator requires NGR why?

1 4218

what is entropy?

NTPC,

3 4907

why mosquito bat makes noise when it hits with a insect?

2 5195

What is meant by SPS Aluminium pipe in substations? Anyone knows whats this?

Amec,

1 4331

What is the actual meaning between the energy conservation and energy saving ?

3 3959

why threre are two parallel lines in transformer's symbol?

NTPC,

11 28103

How to calculate the NGR value for a 2.7MVA Transfomer, 11KV system where the fault current has to be limited to 50A?

Sterling Wilson,

1 7450

1. When do you use a VFD motor? 2. If the ceiling fan is on slow speed, does it consume less electricity? 3. If we want the fan to consume less electricity at low speed, what do we have to do? 4. What does “battery of 180 AMP HOUR” mean to you? 5. What does “battery of 180 AMP HOUR” mean to you? 6. If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

Asian Power, Bhel, Focus, Focus Energy, L&T,

6 13402

IF ANYONE HAVE ANY QUESTION ASK ME AT MY MAIL anmol.bhardwaj5@gmail.com

1600

why any surge protection is not provided to UHV ac transmission line (765kv) ?

NK Power Systems, Reliance,

1 4118

what is sf6 where it is use & working or function ?

5 7569

what a function diesel generetaor turbo charger & turbo charger is more heated explain reason ?

1782

We have 2 Nos. Transformer with the capacity of 2000KVA and 1250 KVA and currently using only one 2000KVA T/R during operational hours while non- operational hous 1250 KVA T/R also used to reduce T & D losses. Similarly, 2 capacitor bank of 500KVAR and 300 KVAR also installed to balance reactive power. Now problem is around 1000 KW load PF is not maintaning 0.99 as 350 KVAR capacitor is in healty condtion. Now the PF is maintain 0.95 to 0.96.

2 6163

How to calculate the electrical load for a standard telecom BTS shelter and choose the DG set capacity for the same load?

Quippo,

2625


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Un-Answered Questions { Electrical Engineering }

Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.

1272


what is through fault?

1735


Why temperature rise is conducted in bus bars and isolators?

734


Comparision of Air break circuit breaker, SF6 Circuit breaker and vacuum circuit breaker.

1903


in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.

1424






What happen when change order of CT in GIS feeder?

1146


How many types of electrical earthing are there?

628


What is slope...? Explain slope 1 and slope 2...?

1053


How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

1642


what is Fan Control Cubicle

1856


if grounding is notdone at regular intervals for long distance transmission, will the load connected at distribution end receive voltage during negativehalf cycle of the sine wave?

1525


will 1050kva DG set withstand for back charge of 16MVA transformer

1433


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..............

1349


What is the effect of solar radiation on the design of an Isolated Phase Busduct?

1825


in control scheme dc logic wiring commonly using negative loop,what is the reason?if we use positive looping what will happen?

1829