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Engineering Interview Questions
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what is a diffrence between MCCB, RCCB, MCB, & ELCB ? what is rated current e.g. on motor name plate indicated that is rated curent? what is full load current? If we run D.C. motor with mechanical coupling and we measure voltage on terminal it shows voltage or not ? same in AC also possible ?

Reliance,

5 13765

WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

 5 9580

Can we weld hot rolled steel ASTM A615 ? Please Give the detail answer please thanks alot

 1815

how to reduce earth to neutral voltage?

Field Gun Factory,

8 23901

why the exchang voltge is in minus polarty i.e -48 instead of +48

 1563

what happens when a cdma user becomes as a roamer?

HCL,

1542

what is the differnce of STATIC ENERGY METER FROM ordinary energy meter?

 1 2723

Any one can explaination about calibration with rotating sub standards?

 1529

What is the basic working principle of Tri vector meter?

TCS,

5 29914

What is the difference between double compression

Bhel, Hyundai, Orchid Chemicals and Pharmaceuticals, PDO, Prefamac,

7 56598

how current flows in circuit?

 11 14636

Which code specifies the specification ofthe construction joints to be provided in the raft slab of a basement which is 6 m deep.what should bethe detail of such a joint?

L&T,

2029

What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?

 6 30065

three phase electronic energy meter have how much voltage in combined both r,y,b & why?

 1 2912

What are LAPD and LAPDm?

Qualcomm,

2 23404

Un-Answered Questions { Engineering }

What will be result if we connect LT votage to the terminal of HT motor?

1705

What is making & breaking current ???

964

for compensate 315mh inductance ,how many capaciance required?

1610

What is the difference between air conditioning and refrigeration?

606

how to produsing geretor power

1720




What kind of concerns is associated with temperature pinch points in condensers?

681

what is the procedure getting road permit form online

1192

Relate FDDI/ATM/SONET to the OSI model.

4316

What is the most common carrier gas used in pneumatic conveying?

722

WHY WE USE {} AT THE STARTING OF C PROGRAM

1493

different between general arc welding & aluminium welding?

1621

Question for mech.engineer in dmrc

1419

Define asymmetrical?

1

Describe the purpose of knee point voltage for differential protection.

636

What is the principle of mechanical refrigeration ?

612

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