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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is short circuit analysis of electrical networks?What are the procedures to be followed for its calculation?

DLF,

2 6820

how the arcing is made in ac electric arc furnace? ( between the three electrodes in any sequences or between the electrode & the charge(steel))

1 3799

What is Phasing out test?

1 17981

Why we have short circuit the secondary of the transformer

1 3432

what is high voltage in india?

Essar,

11 11751

1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?

1214

how can we know the size of cable cross-section from current rating ?

3 4139

starting torque is increased and current is decreased by using external resistance in a slip ring induction motor. How??

3 5870

what the effect will occur if we increase the airgap in induction motor

IES, Tanfac,

4 10365

how can we select the type of wire.what factors we have to look on it , do we have some formula to calculate it. please guide me on it

1343

what's the outstanding feature of universal motor?

Tanfac,

2 6533

what will happen if phases are not shorted with neutral in transformer impedance test? and if neutral is not connected with ground?

1 3141

Three phase alternators are connected in star connection why?

Tanfac,

13 37545

can u light up bulb with out useing neutral

12 22673

How can we findout the maximum efficiancy of Transformer? At which load?

HAL, Tanfac,

1427


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Un-Answered Questions { Electrical Engineering }

v/f drive basic princeple

1749


Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?

1066


What is meant by load angle of an alternator? Upon what factors does the load angle depend?

2371


how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

1443


What is electrical cable termination

2052






Single line diagrams for star to delta and DOL starters.

1626


we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

1052


what is the step by step formula for calculating bus bar phase and neutral size of a panel board.suppose the incomer of panel board is 100A..???step by step answer please

2706


What is safety of Ht panel

964


Why two phase welding machine is used instead of three phase welding machine.

1173


Which types of gate insttaled in static switch. Please give me answer.

965


what is the principle of operation of CFL ??

1991


hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.

2166


hi , i have 150 kw loud and we need 50 m cabil,i want to know wich size cabil we use. thanks

1445


what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1312