Interview Questions Answers in Electrical Engineering, Civil Engineering

where we use stardelta starter and dol starter

Answer

both are use in motor ,The purpose of stardelta starter is
to limit the starting current of motor.If the starting
current is low means we can use dol starter upto 5 hp
motor.above 5 hp motor we should use stardelta starter for
limit the starting current.

Is This Answer Correct ?

43 Yes

4 No

Question { 5178 }

what is single phase motor?

Answer

the motor which run between phase & neutral is called
single phase motor

Is This Answer Correct ?

2 Yes

2 No

Question { 6816 }

what is 2 phase motor?

Answer

the motor which work between two phase is called 2 phase
motor.

Is This Answer Correct ?

4 Yes

5 No

Question { 9476 }

what is meant by mimic diagram ?where it is used ?plz
explain briefly

Answer

thank u Perservance

Is This Answer Correct ?

2 Yes

3 No

Question { 8263 }

suppose we using 3 phase motor of 440 v means what range of
C.T. is require for measuring current , the rating of motor
is 1HP ?

Answer

Tanku MR.Navnit Bhimani then above which HP U suggest to
use CT ?

Is This Answer Correct ?

0 Yes

2 No

Question { 8699 }

A motor works on 30kw.it is working on 440volts.How much
amper will be Required?

Answer

MR bala i con't understand your answer at(30/Rt3 x.8x.440=
49.2 A)
plz clear me this equvation

Is This Answer Correct ?

3 Yes

1 No

Question { 8699 }

A motor works on 30kw.it is working on 440volts.How much
amper will be Required?

Answer

THANKS MR.BALA

Is This Answer Correct ?

0 Yes

0 No

Question { MacLellan, 14384 }

how much Amp we can put in 1200kva generator?

Answer

as per my field knowledge by using formula
I= KVA X 1000/1.732 X 440 X 0.8

THERFORE ANSWER IS :1694A

Is This Answer Correct ?

14 Yes

2 No

Question { NCC, 19548 }

directional over current relay when acted & how it works

Answer

i con't get u .plz send clear answer Aniruddh

Is This Answer Correct ?

0 Yes

5 No

Question { 5579 }

i need project topics along with circuit diagram in the
electrical and electronics engg and also some websites
regarding projets.

Answer

if u know any website means pls send kumar4486@gmail.com

Is This Answer Correct ?

5 Yes

2 No

Question { 8028 }

Why power factor does not occur in DG set ?

Answer

because DG set its not act a load its producing power, its
not getting power ,so power factor occur only in loads like
motors,load bank ,any other suggestions welcome .

Is This Answer Correct ?

4 Yes

11 No

Question { 8028 }

Why power factor does not occur in DG set ?

Answer

thnks for your advice Rahul

Is This Answer Correct ?

0 Yes

1 No

Question { KPTCL, 16606 }

define frequency ?

Answer

if frequency is cycle per second means then why we mention
speed in RPM ?then why we mention frequency in HZ.

Is This Answer Correct ?

6 Yes

14 No

Question { 6396 }

WHAT IS MEANT BY vfd(VARIABLE FREQUENCY DRIVE )HOW CAN WE
APPLY VFD TO MOTOR ? I WANT FULL DETAIL IF ANYBODY KNOW THE
WEBSITE FOR THAT PLZ SEND .THANK U

Answer

thnx thowsif

Is This Answer Correct ?

1 Yes

0 No

Question { 17829 }

how we can improve P.F. by using capacitors ?

Answer

thnx thowsif ur answer is vry useful 4 me

Is This Answer Correct ?

2 Yes

0 No