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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

If we want to change a contactor of faulty one what are the conditions want to fullfil

Qatar Shell,

1956

A 11 KV motor is working. if the supplay is fail. what will happened with it's breaker? Trip / remain the same condition?

 4 6939

A 6.6 KV motor breaker is try to Drack OUT by me while the motor running. What will Happened? a, will Trip. b,Drack Out lever will not access c, will get shock d, noting will happened

 4 7384

If I want to buy a new Xformer for my plant what are the main parameter will I need to check?

 1865

Why the motor take high starting current for long time(10- 15 sec) which is connected to Blower as compaire with a motor which is connected with pump with same rating?

 2 4849

Why a motor blower cobination draw more current at winter than summer?

 1 3880

in the case of 6.6kv motor starter combination contain fuses on it VCB. but in 11KV motor starter combination Fuses are not using in it's VCB why?

 2241

what is the different between RCCB & ELCB

 3 7631

why HT motors are earthed only at equipment side & for it's single core cable with aluminium wire armoure using?

Legrand, NLC Neyveli Lignite Corporation Limited,

1 4223

why Batteries & Battery chargers are used in substation? what is the different between UPS & battery charger?

DLF,

4 52550

In the case of petrochemical area AC drive & AC motor is used where the speed variation is required. Why they are not Using DC drive & DC motors in such areas?

 1 4191

which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?

 2143

what is the minimum (Common factor) insulatin resistance of the following a, 4mm sq wire b, cable from 50 mm sq to 800mm sq

2055

what is power plant?

2 5115

What is difference between incomer & outgoing type Vaccum Circuit Breaker?

VBG,

2 19636

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Un-Answered Questions { Electrical Engineering }

Why use in ht motore

1655

Does the motor power displayed on the Motor name plate is the mechnical power motor delivers or it is consumed power from the system?

4320

Basic motor transformer generator

1431

What is the function of auadag in a cro?

1087

Give atleast 20 alternating current apparatus and devices.

1738

Why syn. Generators are used for the production of electricity?

1105

What are the various types of BUSBAR Schemes? explain each

5247

what is the common earth

1035

What is an alternator impedance value?

2816

what is the carona effects meaning in HT line transmmission system

1961

how external lighting design? please give examples?

1830

R=*ΒΆ l/a

1586

What is contract demand in solar system?

1660

What is electrical grounding?

1107

What is the magnetic field (coil DC ) of Turbo Expander?

2031

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