sanjeet swarnakar


{ City } kolkata
< Country > india
* Profession * diploma electrical engineer
User No # 22487
Total Questions Posted # 4
Total Answers Posted # 33

Total Answers Posted for My Questions # 27
Total Views for My Questions # 37705

Users Marked my Answers as Correct # 377
Users Marked my Answers as Wrong # 268
Answers / { sanjeet swarnakar }

Question { 9998 }

How to convert resistance value at 20 degree to 90 degree?


Answer

Ro -resistance at o degre centigrade
Rt -resistance at t degre centigrade
we have formula
Rt = Ro(1+alpha t)
here alpha is cofficient of resistivity

Is This Answer Correct ?    14 Yes 0 No

Question { ABB, 16069 }

if we convert ampers into kw,which one formula use by
us,pls tell me?


Answer

please tell me ur email ID

Is This Answer Correct ?    3 Yes 4 No


Question { 4685 }

how induction generator generated the power without
excition like syncronous generator.


Answer

due to residual magnetic present in the rotor core

Is This Answer Correct ?    4 Yes 0 No

Question { 9040 }

Can anybody explain Why starters are not used for motor
starting in industries?


Answer

starer reduce starting current with adding the external
resistance with the armature in series ,because the
resistance of the armature is very less,so starting current
is very high .
I=V/R if r is less then curent is very high

to reduce the starting curent starter is used.

up to 5 hp motor dol starter is used
but in industries the rating of the motor is if higher
thane 5 hp then starter is not used

Is This Answer Correct ?    1 Yes 9 No

Question { L&T, 43645 }

5. What is PMG in Alternators?


Answer

both the answer is right


please tell me ur email ID
my email ID is sanjeet.swarnakar@gmail.com

Is This Answer Correct ?    5 Yes 3 No

Question { Apollo, 109695 }

what are the main parts of UPS what is the function of that?


Answer

please tell me ur email ID
my email ID is sanjeet.swarnakar@gmail.com

Is This Answer Correct ?    14 Yes 52 No

Question { TCS, 8758 }

hoe to select the cable size in sq mm for certain load?


Answer

by kelvins law we can calcute the economical size of the
conductor

Is This Answer Correct ?    0 Yes 8 No

Question { Hatsun, 3572 }

1.what is electricity
2.what is electronice
3.how many modules
4.five electrical component with symbol
5.five electronice componene with symbol
6.how convert 220v.A/C to 24v/DC
7.220V.WAIRING DIAGRAM OF AMMETER/VOLTMETER/OHMMETEER


Answer

1. electricity is the flow of electon ,when the potential
difference is created between the two end of the conductor .
2.

Is This Answer Correct ?    4 Yes 5 No

Question { 4370 }

what is joule?


Answer

the energy used in displaceing 1 kg of substances to 1
meter is 1 joule
or 1 watt of bulb glow for 1 sec ,the energy used is 1
joule

Is This Answer Correct ?    7 Yes 0 No

Question { NTTF Nettur Technical Training Foundation, 48426 }

which type of motor is suitable for lift?


Answer

cumilitive compound motor

Is This Answer Correct ?    24 Yes 10 No

Question { ABB, 26124 }

What is the technical reason for adopting color coding of
three phase system as RYB.


Answer

in other country in place of RYB other convention is also
used



please tell me ur email ID

Is This Answer Correct ?    16 Yes 6 No

Question { 15437 }

which trsanmission is easy and cost effective AC or DC.


Answer

trsanmission is easy and cost effective in case of dc
1. it requires only two conductor
2.loss is vey lessthan ac supply
3.no need of capacitor ,inductor
4.corona loss,skin effect are not occur in case of dc
current

Is This Answer Correct ?    10 Yes 3 No

Question { Nalco, 9233 }

Does increase or decrease of reactive load affects the
Voltage.


Answer

yes,
when reactance increase loss increase
so voltage decrease

Is This Answer Correct ?    5 Yes 7 No

Question { JCB, 39086 }

Questions :-
HR-
Q.1 about yourself & family background ?
Q.2 Why u choose Power sector as ur carrier starting not any
other sector ??
Q. 3 What think abt NTPC ?
Techincal Questions:-
Q.1 about Vocational Training……What u did , see the main
equipments….etc
Q.2 Why a transformer Noise during its running condition ?
Q.3 about transformer oil material & Test name for the
measurement of its dielectric strength & wht will u do if
its dielectric strength goes low ? ……..some discussion type ?
Q.4 What is relation between transmission lines &
Communication lines ?
Q.5 Which Machine u will prefer to use at a place where
flammable gases are coming out & why ?
Q.6 how fault in an electric system is detected & hw
protection of equipments is done ?
Q.7 Why we didn’t feel electric shock in an electric train ??
Q.8 Anything u want to ask from us ??


Answer

give ur mail id
my email id is
sanjeet.swarnakar@gmail.com

Is This Answer Correct ?    9 Yes 16 No

Question { Polycab, 33856 }

Why do we give DC excitation to AC Synchronous motor??


Answer

if AC excitation is given then alternate north and south
pole is created on rotor field
the rotor move half cycle clockwise and half cycle anti
clockwise and finaly stop to rotate
due to this dc current is given to the rotor of the
syncroneous motor

Is This Answer Correct ?    38 Yes 18 No

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