Electrical Engineering Interview Questions
Questions Answers Views Company eMail

critically criticize the application of ring main unit in power system

973

why i can not use thimble on capacitor duty contactor

846

Make a list of materials and layout diagram for a 35hp motor, to be wired at 35meter away from the MDB in a chemical factory.

FEWA,

2 3316

Draw SLD for a panel has 500A Bus Bar rating, with 4 outgoing, each is 80 A (load current), showing the transformer and capacitor bank rating.

FEWA,

1057

Draw SLD feeding from the SS up to distribution board of the load, calculate cable size, breaker sizes, and meter for the following case: Ground Floor: electric room, pump room, 5 shops, each is 15 KW First Floor: 5 shops, each is 15 KW Second Floor: showroom 30 KW Service Loads: water pump 3 KW (3ph) , fire pump 3 KW (3ph), and one DB service 12 KW (3ph).

FEWA, HMK,

1375

Draw an S.L.D of the main panel for a hospital, showing meter position. Essential loads are: 1) Equipment load 100 KW 2) Critical load 500 KW 3) Life AID Safety load 400 KW 4) NON-Essential load 200 KW 5) Other service loads 200 KW Calculate and suggest the size of the transformer, size of main cable, capacitor bank, and calculate the capacity of an emergency load having above first three mentioned loads is supplied by an emergency generator.

FEWA, HMK,

1179

what are the disadvantages of low power factor

HMK,

841

how can we Increase the Value Of Frequency in electric circuits

HMK,

894

Give accurate definitions for these electric terms: Inductor Inductance Inductive Induction Reactance Reactive Esam Baraka ٢١ ساعة

HMK,

893

how to calculate short circuit current for the busbar

HMK,

924

What is main purpose of chock coil and starter in florescent tube ?

1 1380

What is the comparison between 30mA DP RCCB and 100mA DP RCCB and can replace it against 63A MCB

1090

7. A resistance of 30 ohm is connected across 240v supply. If a resistance R ohm is connected in parallel with 30ohm resistor across the same supply, the current drawn becomes triple of original one The unknown resistor R is

2 9631

What is duty cycle for HT motors? How many start permitted if mentioned as 01 for hot and 02 for cold per duty cycle?

GVK,

1 1623

Purpose of providing neutral isolation panel for parallel operation of diesel generator

1160


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Un-Answered Questions { Electrical Engineering }

WHAT WOULD BE THE FORMULA OF WIRE GAUGE FOR A FULL LOAD CURRENT

1659


List examples of voltage source?

583


what is differnce btwen lll and lllg faults

1488


can i use ups power as a raw power for another ups

1438


What happens to voltage when current is zero?

745






how rectifier transformer work in electroststic precipetatore(esp?

2064


what is the voltages using in movie theaters??? why ??why not other??

1706


WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?WHAT IS THE NEED TO BE PHASE SHIFT CHANGE BETWEEN THE PRIMARY AND SECONDARY WINDING

1315


what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks

1718


What is the function of the circuit breaker failure relay?

1875


How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?

1546


What is knee point voltage?

654


In a flange coupling, the flange bolts are designed for

671


Differnce between negative Pahse SequenceFunction and unbalance Function?

1269


how to select the no. of brushes in a lap winding?

1736