dev


{ City } nainital
< Country > india
* Profession *
User No # 67612
Total Questions Posted # 11
Total Answers Posted # 17

Total Answers Posted for My Questions # 21
Total Views for My Questions # 41639

Users Marked my Answers as Correct # 80
Users Marked my Answers as Wrong # 51
Questions / { dev }
Questions Answers Category Views Company eMail

what happend if we remove dc exciter from moving machine..: gg

 4 Electrical Engineering 4626

what is slip ring startor

 1 Electrical Engineering 2672

corona happens more in summer or winter?

MAHINDRA,

3 Electrical Engineering 5941

What phase difference between p and s winding of transformer

MAHINDRA,

1 Electrical Engineering 4611

in alternator why on load terminal voltage is less than no load teprminal voltage

 1 Electrical Engineering 2897

Why we use parllel operation of alternator

 1 Electrical Engineering 2934

why we short ckt the secondry vo5tage/ winding in transfr and motor?

 2 Electrical Engineering 3990

why in transformer there is not rotating fiddl/ magnetic field like motor

 4 Electrical Engineering 4295

what is relation between torque and speed / rpm?

 1 Electrical Engineering 3293

What happen if we give resistance to the armatuure of a dc motor?a

 1 Electrical Engineering 2692

Which generation plant has instant start

 2 Electrical Engineering 3688



Answers / { dev }

Question { 13770 }

why only 11kv level is used for transmission purpose? why
not 230v?


Answer

Min vol. for transmission is 33 kv not 11 kv
11 kv is max. distribution voltage

Is This Answer Correct ?    2 Yes 5 No

Question { MAHINDRA, 8153 }

corona happens more in ac or dc?


Answer

thank u guys its mean i have another right
answer at written test

Is This Answer Correct ?    1 Yes 0 No


Question { 32335 }

what type of motor is used in washing machine


Answer

slip ring single phase

Is This Answer Correct ?    10 Yes 14 No

Question { Bajaj, 26668 }

what is the power factor of choke coil used in tubelight


Answer

i think it should be 0.7 to 0.8 because we use
it step up the voltage like transformeri

Is This Answer Correct ?    11 Yes 12 No

Question { Bajaj, 26668 }

what is the power factor of choke coil used in tubelight


Answer

it is .6 acc to my book

Is This Answer Correct ?    0 Yes 5 No

Question { 6423 }

if we connect a ohmmeter across shorted capacitor .what will
be the reading..will it be zero or infinity


Answer

zero coz of max currentu

Is This Answer Correct ?    3 Yes 1 No

Question { 7474 }

why do we need a 4th wire in 3phase 3wire transmission line


Answer

that is earth wire

Is This Answer Correct ?    22 Yes 2 No

Question { 3004 }

if there is nutral in phase why we use earthing wire and
grounding?
even at fault condition the fault current flows to neutral
(it is a lower path)


Answer

nuteral is for completing the ckt and earthing wire is for
electrical equipment safety neutral wure cant protect
equipment similarly grounding for unbalanced current safety
for human mainly works on principal of rccb and elcb

Is This Answer Correct ?    5 Yes 0 No

Question { 14274 }

which is the gas used in tube light?


Answer

Hello madan bhai ans is
nitrogen and argon i hope u
have tick the right ans
kya tumne bhel ka exam diya
tha ye do ques usme hi aye
the

Is This Answer Correct ?    0 Yes 3 No

Question { 5038 }

The power showed in the name plate of the motor is input
power or output power??
The power showed in the name plate is 18.5kw
measured current is 34.5 amps. location is india.
can i calculate the efficiency of the motor using this
data??


Answer

Remember the substation
gives us the power calculated
in kva what we use
calculated in kw and what
returns to grid it will be kvar
so it would be output power
and we cant calculate
effeciency by only motor
current and voltage

Is This Answer Correct ?    2 Yes 2 No

Question { 3942 }

what type of relay has to be used for tripping the circuit
from mains when a fault occur in a machine


Answer

It depends upon the fault i
mean if there would be any
earth fault or overcurrent
then we use impedance relay
if u r talking about small
motor we can use overload
relay for heavy equipment
we have impedance relay
tripping relay mm30 relay for
every fault

Is This Answer Correct ?    3 Yes 0 No

Question { 4270 }

a wire in which bulb is connected
there is two terminal
when one terminal is connected to phase than why the value of
current shock in nutral terminal is max. or large??


Answer

U cant get any shock it is just like a tester when u touch the tester metal body u work like a neutral as well as here in bulb

Is This Answer Correct ?    0 Yes 2 No

Question { 2681 }

What is the Maximum Power generation capacity of a
Synchronus Machine ??


Answer

I think u r talking about alternator max rating is 33kv used by america, russia

Is This Answer Correct ?    2 Yes 1 No

Question { RRB, 6088 }

Why sip ring used in ac motor also why its not used in dc motor?


Answer

Actualy for better torque in induction motor we should have high resistance and low inductance but in induction motor we have coil which have high inductance so we give high resistance from rheostat to rotor. And we use slip ring because it is use for rotating device only in ac motor

Is This Answer Correct ?    2 Yes 1 No

Question { Reliance, 6482 }

What it the purpose of parallel phasing transfomers??


Answer

Load sharing

Is This Answer Correct ?    5 Yes 0 No

 [1]   2    Next