vignesh


{ City } noida
< Country > india
* Profession * associate software engineer
User No # 96482
Total Questions Posted # 10
Total Answers Posted # 33

Total Answers Posted for My Questions # 38
Total Views for My Questions # 64997

Users Marked my Answers as Correct # 196
Users Marked my Answers as Wrong # 48
Answers / { vignesh }

Question { TNEB Tamil Nadu Electricity Board, 11471 }

why are maintine power factor 0.99 in Eb line?
why are used capacitor bank in Eb line?
what is the purpose capacitor bank?


Answer

Generally capacitors are used to improve power factors in inductive loads... Inductive load will reduce the current phase with voltage.. so lagging power factor is obtained.. in order to recover that, capacitance is provided which will reduce the voltage phase with current..so the pf remains almost near to 1(not exactly one)...

Is This Answer Correct ?    6 Yes 0 No

Question { 11527 }

If the ceiling fan is on slow speed, does it consume less
electricity?


Answer

No.. The power consumed by the fan in both low n high speed,
remains the same.. bcoz at low speed the current given to the
armature reduced but the reduced current is given to
resistance.. hence the speed reduces but power absorbed
remains constant...

Is This Answer Correct ?    11 Yes 8 No


Question { 4265 }

What is the difference between phase, neutral wire and
earth cable. if neutral is connected to ground, y we need
earthing cable? what difference in hot and cold wire? do
neutral wire carry current?


Answer

Phase- carry the current at required voltage..
neutral- negative phase of current vil flow through it..
Earth- the connection of ENTIRE neutral wires to ground..
we will not connect neutral n phase wire to ground...
Earthing cable s used for byepassing the current due to lightning,etc..
Neutral wire can carry current but it not real one.. dat s if u checkd with tester, there s no current in neutral it seems.. but actually it carries the negative part of current..
I dont know abt hot n cold wire.. if anyone knows pls post it

Is This Answer Correct ?    4 Yes 0 No

Question { Asian Paints, 16160 }

Based on what the rating of machines are provided??(ANswer should in single word)


Answer

INSULATION OF THE MACHINES

Is This Answer Correct ?    21 Yes 12 No

Question { HAL, 8976 }

Which type of power plant is more easier to produce
electrical power at economical
condition?


Answer

HYDRO POWER PLANT

Is This Answer Correct ?    14 Yes 0 No

Question { HAL, 8976 }

Which type of power plant is more easier to produce
electrical power at economical
condition?


Answer

Hydro Power Plant

Is This Answer Correct ?    9 Yes 0 No

Question { HAL, 8976 }

Which type of power plant is more easier to produce
electrical power at economical
condition?


Answer

v cant install solar power plant with economical benefits.. bcos one square feet of solar panel cost s more...

Is This Answer Correct ?    1 Yes 0 No

Question { 3583 }

what is the uses of control rod?


Answer

Control rods are used in nuclear power plants.. in tat. continously bombarding of neutrons takes place.. if it happens, too much heat was generated.. in order to cut the chain reaction, control rods r used to block the neutrons and hence stopping the process///

Is This Answer Correct ?    0 Yes 1 No

Question { 5455 }

What is bottlenecks and how to identify bottlenecks? Could anyone answer this question in point of interview please....


Answer

Its based on performance. Bottleneck is measure for the
maximum load that is applicable to the application.After that,
the system will be crashed.

Is This Answer Correct ?    0 Yes 3 No

Question { CTS, 5910 }

How Load Runner records the script? I mean How it generate the
script?


Answer

It will record all the client activities that was performed during recording. Instead, it records all the request sent to the server and request received from the server.

Is This Answer Correct ?    11 Yes 0 No

Question { 5895 }

hi i'm jhaniya i'm a fresher i've completed course in
informatica and cognos but yet nw i din get a job ..so
planning to study oracle will tis match ..even if i get
placed in oracle can i then get into informatica wil this
work out ..which part can i choose in oracle ..


Answer

you are certified in informatica... dat sounds good.. since informatica is ETL tool, u can use it with any database for warehouse.. like oracle,mysql,db2,etc.. so u can surely do certification in oracle side.. al d best

Is This Answer Correct ?    0 Yes 0 No

Question { IBM, 9863 }

is it possible to assign two primary key in a table


Answer

Answer is strictly NO...!!!

we may have morethan one unique column in a table but we should assign only one primary key...!!

Is This Answer Correct ?    3 Yes 0 No

Question { HP, 8005 }

without using count(*) and rownum how can we count total
record in a table


Answer

simple..!!! Findout the primary key of the table..

then..

select count(primary_key_column) from table;

thats all; becos count vil work with non-null values.

primary key cant b null..
so.. v can use count on primary key...

Is This Answer Correct ?    13 Yes 1 No

Question { BirlaSoft, 4871 }

you are sorting a table using "order by"(descending) clause of
a column which contains a null value...whether that row
containing null value will come first or last in the output??


Answer

The column contains null value will come first.. COz oracle consider the null value as larger value in this case....

Is This Answer Correct ?    15 Yes 0 No

Question { 4109 }

One table how may column and Primary key


Answer

ONE COLUMN MAY HAVE N NUMBER OF COLUMNS,.. THERE IS NO RESTRICTION IN THAT.. BUT A TABLE SHOULD CONTAIN ONLY ONE PRIMARY KEY, BUT IT MAY HAVE N NUMBER OF UNIQUE KEYS.

Is This Answer Correct ?    12 Yes 3 No

Prev    1    [2]   3    Next