Interview Questions Answers in Electrical Engineering, Industrial Engineering, General Knowledge

What are instrument transformers?

Answer

the instrument transformers are

1. CVT(Capacitive voltage transforme)

2. CT (Current tranformer)

First have three cores used for metering and protection
purpose in substation

Second have five cores and also used for protection and
metering in substation

Is This Answer Correct ?

3 Yes

3 No

Question { Adani, 9729 }

how is classified voltage level in generation,transmission
& distribution system?,

Answer

distrbution 415 v
gen 11kv
trans 33-765 kv

Is This Answer Correct ?

22 Yes

2 No

Question { ONGC, 18323 }

how many types of colling system it transformers?

Answer

1. ONAN (oil natural,air natural)
2. ONAF (oil natural,air forced)
3. OFAF (oil forced,air forced)
4. ODWF (oil direct,water forced)
5. OFAN (oil forced,air forced)

Is This Answer Correct ?

39 Yes

5 No

Question { ONGC, 10659 }

how many typetesting of transformers?

Answer

Transfrmer has
1. routine tests
2. type test
3. special test

further type tests are
1. IR OF WINDINGS
2. POLARITY
3. VOL. RATIO
4. TEMP RISE TEST
5 DIELECTRIC LOSS

Is This Answer Correct ?

21 Yes

5 No

Question { 4204 }

What is DHCP & work?

Answer

DHCP is dynamic host configuration protocol

it is used for assigning IP address to differnt devices on
network.

Is This Answer Correct ?

7 Yes

3 No

Question { ACC, 67731 }

what is AMF panel????????

Answer

it is related alternetor/dg set. it has full form
of "auotmatic main failure".

during s/d or main failure after predetemined time starting
of alternator .
monitor oil level,oil and water temperature.
it monitors voltage,speed frequency etc.
after restoring of main it off the alternator/dg set.

Is This Answer Correct ?

60 Yes

23 No

Question { 17024 }

WHY WE CAN GENERATE POWER IN 3PHASE MODE ONLY NOT IN 4 OR
5PHASE

Answer

As we know that in power sytem there is namely RYB phase
sequence. one genrator has been designed for three phase.
if there are numbers of generator running in parralel then
there will generated power have phases of RYB*NO. of
generator(assumed)but all geration will be added in form of
three phases only.

Is This Answer Correct ?

1 Yes

32 No

Question { CPCL, 15488 }

The corona effect is more in
a) summer b) winter c) dry weather d)
humidity weather

Answer

b. winter

Is This Answer Correct ?

3 Yes

11 No

Question { Engineers India Limited, 4103 }

Who was Ramansay award winner in the yr 2006?

Answer

annie padilla

Is This Answer Correct ?

6 Yes

1 No

Question { Engineers India Limited, 5362 }

Who got the Rammon Magases Award 2007 this year.

Answer

mr. P.Sainath(India)

Is This Answer Correct ?

5 Yes

1 No

Question { Engineers India Limited, 7350 }

Induction type 1-p wattmeter reads …..
a) true value b) apparent value c)volt ampere value

Answer

(a) true value

Is This Answer Correct ?

18 Yes

3 No

Question { IBM, 35704 }

why AC cannot to be stored and DC cannot be transmitted?

Answer

A/c supply can not store because in A/c supply in frist
half cycle it charge (store) and other half it dischage. In
A/c supply terminal are change in cycle.so it is not
possible..

nowdays DC supply can also be transmitted

+/-500 KC DC lines are operated in INDIA by central
transmission utility company named POWERGRID CORP. OF INDIA

Is This Answer Correct ?

41 Yes

13 No

Question { Bhel, 57244 }

what is the highest transmission voltage in India till now?

Answer

765(800kv)

but 1200 kv testing in progress

Is This Answer Correct ?

33 Yes

5 No

Question { 6019 }

what is the switching substation

Answer

it is a intermediate point between two substations where
line enters and leave this point having no step up or down
transformer. it is provided to reduce voltage due to
capacitive effect or to increase voltage which is due to
reactive effect

Is This Answer Correct ?

22 Yes

0 No

Question { 5221 }

in single phase circuit if i connect a heater between phase
and neutral, then what will be the current path? phase to
neutral or neutral to phase.

Answer

phase to neutral.

Is This Answer Correct ?

10 Yes

0 No

sukhvinder