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HPCL Electrical Engineering Interview Questions

why two fuses are used in battery charging room?one in positive line and the other in negative line?do any DC system require two fuses?

3283

what are the different sizes of U.G. cable & where these cabl;es are used according to voltage ..

1331

can you plz send l&t aptitude questions if available its urgent plz plz plz

1338

yesterday i am using my laptop by plugging power supply also battery was working properly after while i unplugged AC power source ,using my battery i played car game (use much power) after that the battery finished the charge and it closed my PC. after that my battery not charge (when unplug automatically PC will turn off)

1596

what is the different between surgearrester and lighting arrester

5658

Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

1844

Is RTCC panel needs any control supply.

1175

What shall be the secondary output voltage if the primary winding of a 220/6V, 50 Hz transformer is energized by an 110V, 60 Hz supply?

406

What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?

445

When the relative speed between the magnetic fields of stator and rotor does is zero under steady state operation?

404

What is the armature mmf in a D.C machine?

464

What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?

373

The electromagnetic torque developed is proportional to what in a D.C series motor?

365

Explain the method to keep noises low in a control system?

332

Which motor will you choose which can operate in both lagging as well as leading power factors?

347

What is the difference between graphical skinning and stateful skinning?

1

Explain callback in Node.js?

56

What is the default value of boolean variable?

216

What is the use of base keyword? Tell me a practical example for base keywordâ€™s usage?

291

What is api in j2ee?

235

Which interrupt has the highest priority?

331

audit under section and penalty under saction scurtiny under saction

1253

What are the states of thread in java?

238

How to get that a secondary index is attached to a select query?

638

What is slice() method in jquery?

223

How does grep work in linux?

254

What is null propagation c#?

246

How to find out what is the default collation in a database?

298

What languages do you need to know to build a website?

38

What is queue() in jquery?

240