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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 13800

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 9608

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

 1828

how to reduce earth to neutral voltage?

Field Gun Factory,

8 23930

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

 1575

what happens when a cdma user becomes as a roamer?

HCL,

1549

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

 1 2729

Any one can explaination about calibration with rotating sub standards?

 1536

What is the basic working principle of Tri vector meter?

TCS,

5 29938

What is the difference between double compression

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

7 56633

how current flows in circuit?

 11 14684

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,

2040

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

 6 30124

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

 1 2920

What are LAPD and LAPDm?

Qualcomm,

2 23432

Un-Answered Questions { Engineering }

What is the use of worm gears?

604

What is channel coding?

1439

hi every body i am master student in control engineering and my project is slip control in trains i assumed a Dc motore as traction motor but i don't have characteristics of this kind of motor that is used in train. i want from every body if he or she has the characteristics or information about Dc motor that is used in train give me those information or technical characteristics .

1059

can we resonance with triple bonds?

1626

What are high pass filter and low pass filter? and What are the flowmeter ?

1512




Good day everyone,currently in our premise we using 30kw slip ring motor with resistance bank which we use as forward and reverse at conveyor bar handling. So,my question is how do we calculate the resistance bank which is suit the motor. Kindly,assist me... thank you

1273

The friction plate is always mounted on a) flywheel b) Pressure plate c) Internally splined hub d) Clutch spring

1025

why high speed tripping relay is used in protection circuit why not normal relay

853

Explain how do motion detectors work?

575

Who built the sears tower?

639

what is conductor constant of raccun conductor

1779

what would happen if reactive power (kvar)is increased (more)or decreased (less)? how much exact reactive power should be maintained? and what should be done for that

1777

please explain to me how to calculate current,voltage,resistance with formula??

976

sir i have applied for ntpc and engineers india can u suggest some books which have one words.

1372

What are the advantages of using a fet instead of a bjt?

572

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