Electrical Engineering Interview Questions
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Basic motor transformer generator

eCentric Solutions,

172

How to perform a DC resistance test In Alternator and their proceduces?

145

if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

174




what is difference between KW and KVA

204

how to select rating of HT Panel

185

if we have 320KVA Genset kindly advice how much load we can put it.

201

For 35 HP motor how much amount of capacitor should be on in kvr to reduce the current bill

1 261

Why transformer used in UPS??

JLL,

220




The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

211

if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

214

1hp single phase load = howmuch 3 phase load

161

1.4 What is meant by CT knee point voltage and how would you determine it

203

If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?

135

If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

ABC,

112

i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

96


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Un-Answered Questions { Electrical Engineering }

what could be the RMS value and average value of a 4 phase sine wave?

731


An active element is one which a. Supplies energy b. Absorbs energy c. Supplies energy and convert energy from one form to another

632


How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.

687


What is an alternator impedance value?

1735


Single phase and threephase power calculation

885






What Should be the value of Vector Surge angle at Tripping and how to calculate it?

850


WHAT IS THE TECHNICAL SPECIFICATION OF C CURVE & D CURVE LEGRAND MAKE MCB

1252


Where is the best place to mount  distribution panel in a house.

891


A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

1238


difine electrical ballast in HPSVL

791


how the CT and PT is connected in the circuit during testing of transformer explain with diagram

840


Difference between drift current and diffusion current?

535


Why the cores of large transformers build up of circular cross section?

784


how withstand of hi-pot test outputs of transformer wire 2.5mm

726


i need previous entrence exam papers of nhpc.

1616