Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Make a list observation on Transformer?

HSL,

1051

How many earthings are required for commissioning the Transformer?

HSL, Dalmia Group,

14 16477

Name the earthings?

HSL,

3 4860




What is the acceptable earth resistance for Commissioning the Transformer?

HSL,

6 5869

Draw a SLD of HT distribution EB grid up to users Transformer?

HSL, VVL,

4426

What is Engine?

HSL,

6 3278

What are the earthing required for commissionthe DG Set?

HSL,

2 3137

If AVR fails in DG set what will be the affect?

HSL, GoodYear, Hotline Glass,

17 25057




What are the safety measures of Alternator Explain them?

HSL,

1 2191

Draw a SLD of DG distribution up to main LT panel?

HSL, TATA,

6524

What is mechanical interlock?Explain the uses?

HSL,

2 5856

What is UPS?

HSL,

14 7137

Draw a Block diagram of TWO UPS systems connected in Parallel in Paralled mode?

HSL,

2603

Draw a block diagramof Three UPS systems connected in Parallel mode?

HSL,

822

What are types of central ac plants?

HSL,

1 3615


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Un-Answered Questions { Electrical Engineering }

On a 6 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 42 AH). What Shall be the current rating of DC MCB ?

1017


any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?

647


what is the size of cable for 15kw motor and 85 meter cable length using with vfd

1141


why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

929


the problem faced on star or delta winding connection??

663






if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?

333


How will polarity test of Dy5 Transformer ?

922


What are the specifications for conducting earth leakage test as per IEC standard?

549


how can we change the phase angle b/w two phase?

2258


how many electricity poles are there and what are the names and their sizes.

620


1hp= how much rpm

677


At light load transformer efficiency is less because A secondary output is low B transformer losses are high C fixed loss is high compared to output D copper loss is small

2025


What is the exact formula for one weber of magnetic flux?

841


how we calculate electrical load on a building according to area?

1402


working principle of AC Servo Motor with its construction

7363