Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above

1311

A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm

2 2486

If we have two nodes A and B and Vab is the potential difference between these nodes then which node is called reference node a.node A b.node B c. Ground node

1 4577

To have variable speeds we use a. Induction motor b. Traction motor c. Shunt motor

1 2469

ROC converges if poles and zeros lie inside a. Origion b. Z=1

1757

Period of infinite continuous fourier series a. N b. N+M c.infinite

1 4588

Which protection detects both AC and DC?

Megatron Solutions,

3 4868

how to calculate total load in a villa?

Megatron Solutions,

1 2738

In Single Phase AC Supply,If Voltage between Phase and Neutral is 230V means what will be the Voltage between Phase and Earth?

2 2526

best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?

1221

I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

1194

We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables) please provided formula for calculate the cable with example.

SK Engineering,

1182

Please provided formula for calculate the cable size from step up transformer to M.V panel, run overhead aluminum cables, total load is 5mega watt, total length 900 feet.

SK Engineering,

1276

How to calculate the size of earth cable to earth the neutral of UPS ?

N Johnson,

1388

how many ht 11 kv cable size for 11kv 2000 kva 11kv*433v transformer ?

Megatron Solutions, TCS,

3 7133


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Un-Answered Questions { Electrical Engineering }

What is the end effect of linear induction motor ??

1543


What is the difference between single point and double point bonding. please kindly detail about bonding of cables.

1898


am commissioning the trafo without connecting the neutral therefore unbalance will occur what is the alternative solution for this?

1333


If we have 11 kv RYB Phase single core cable near about. Then wht effect and losses

1318


what are the ''pitting rings''and how cn they be controlled in a series generator

1341






List few applications of d.c series motor?

672


current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer

1134


Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.

1588


How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

1730


DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS

1585


i want use the cable size 16cx4 core aluminium usege watts 240x2000w this cable size is correct?

1763


As you achieve greater success with the company after some years, Will you like to be a share holder in our company?

2361


What the formula for calculating no.of earthings & size of earth strip for 100mX90m shop.

1839


what is the function and use of cable differential protection relay?

2370


In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.

1489