Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is bandpass of a transformer?

2 6153

When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

Bhel, Sail, Sterling Telecom, TCS,

15 48925

please send me the L&T Emb. sys. placement papers and entire details of pattren

HMM, L&T,

1996

Why we connect the capacitor in Delta?if we conect in Star what will happen?

9 30823

What is IGBT?Where it is used? What is the difference between IGBT and Thyristor?

AC, Formo Plastic, HBL Power Systems, SECL,

5 63300

What is mean by diversity Fator?

7 19892

can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

Philips,

11 20245

Explain Clearly Pahase and Neutral?

7 10586

Why the Motor takes High Current in Starting time?

5 11135

What is the difference between Surge protection device and Lighting arrester?

6 15488

Explain the working principle of Synchronous Generator and Assynchronous generator?

TATA,

11 52361

why the current leads voltage in the case of a capasitor

Infosys,

9 19266

Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?

9 14790

The rotor current is directly proportional to slip. How?

3 7624

How the starter control the starting current in three phase AC Motor?(In DC apply the reistance).

6 14638


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Un-Answered Questions { Electrical Engineering }

How to calculate the volumetric capacity of a oxygen & Nitrogen gas Cylinder if pressure is 145 kg/cm2 & water capacity of cylinder is 67 liters.

1862


how can i determine the gear ratio for a rack and pinion system if an electronic gate operated by an electric motor is to travel a distance of 5meters in 15 seconds.

1756


PLS MENTION QUESTIONS ASKED IN IOCL INTERVIEW FOR ELECTRICAL EGG??

2105


How does the phase sequence controller works, how it identifies the phases? confirm working principle

1754


During underground cabling in landscape area what did we cover the cable with to prevent the electric shock & protect the cable?

1533






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.

1338


how does commutator convert a.c to d.c?

1890


what are the accessories need to be added while doing estimation for the following: 1.MCCB 2.MCB 3.ACB

1697


what is ground fault in ACB?

1779


WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.

1589


I AM FROM ELECTRICAL ENGINEERING ? I AM ASPIRING FOR "BHEL".HOW I HAVE TO PREPARE .ON WHICH TOPICS TO BE CONCENTRATE MORE.PLEASE GIVE FULL DETAILS OF WRITTEN EXAM.

1808


how to calculate the change over time for star delta starter for different KW motor?

3887


What is class ab operation?

754


In parallel operation time both NGR’s close or not close if both close what will happen

3402


What are the difference between CT/PT operated Meter and RRAMR Meter for HT/LT application?

2179