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Question 
WHAT IS MEANT BY MECHANICAL ENGINEER?
OR WHO IS MECHANICAL ENGINEER? 
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Interview Question Submitted By :: Ksgsuresh 
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Answer 
Mechanical engineering is a discipline of engineering that applies the principles of physics and materials science for analysis, design, manufacturing, and maintenance of mechanical systems. 
0  Ankit 


Answer 
mechanical engineers are the engineers who made the machines by applying simple physics and who know all about it. 
0  Sanwar R Marak 


Question 
2. What are the grades of steel used in the concrete design? 
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Answer Posted By 
Interview Question Submitted By :: Jainaryan312 
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Answer 
Fe 250
Fe 415
Fe 500
Now days Fe 415 is uesd. 
0  Mr.sagar .y. Bothare 




Answer 
now Fe 500 is more used due to its heavy quality then Fe 415
and rate difference is low 
0  Pankaj 


Answer 
Two types of steel using in concrete design
1) Tor steel 460 N/m2
2) Mild steel 250 N/m2 
0  Fm Irfan 


Answer 
There are four types of Steel grade :
Fe250
Fe415
Fe500
Fe550
How the grades are classified ?
The grades are classified in many ways but the main thing we
all should know is the vary of compressive strength..!!!
For fe415 its Compressive strength is 415n/mm2 and for fe500
is 500N/mm2 and similarly for other grades[:)]..!!! 
0  Karthik 


Answer 
all markable 
0  Vivek Kumar Singh 


Answer 
Fe 250
Fe 415
Fe 500
Fe 415 is mostly used in now a day for
construction 
0  Sreenath 


Question 
what is meant by fuzzy logic? what is fuzzification and
defuzzification? 
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Interview Question Submitted By :: Karuna 
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Answer 
the fuzzy logic is mainly used to determine the
uncertainity of the purticular system.
here the fuzzification means ascending manner
and defuzzification means descending manner according to
from membership functions 
0  Bikkinas 


Answer 
fuzzification means coverting crisp values to fuzzy values and reciprocal for defuzzification. 
0  Karuna 


Answer 
I think in electrical engineering ,fuzzy logic is used to
mimic human actions approximately.Automatic Washing machine
is using fuzzy logic according to the Advt.i.e. as you start
the machine,water is filled in the tub,rinsing will
commence after that ,thereafter spin dry ..etc 
0  K.prakashchandra 


Answer 
fuzzy means sets of rules.Fuzzy – “not clear, distinct, or precise; blurred”
A form of knowledge representation suitable for notions that cannot be defined precisely, but which depend upon their contexts. 
0  Mashroob Kauser 


Question 
What is cascade control in process instrumentation? 
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Interview Question Submitted By :: Gaurav 
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Answer 
Cascade Control system in process instrumentation is
defined as a system whose gain is dependent of other
control controlled variable vice versa.For Example: Four
conveyor running process if the speed of any one drive is
changed other will also vary acording to its defined gain. 
0  Swarndeep Signh 


Answer 
In CASCADE control output of one system works as the set
point for the next system , this is called cascading and
hence the system is said to be cascade control system. 
0  Himanshu Bhardwaj 


Answer 
Best example of cascade control is level control of a
tank. first taking care of it's actual level( getting
signal from level transmitter) then controlling it's flow.
so only controlling element is flow and level singnal will
work as a setpoint for flow controlling.
There are two controller used one for level whose
controller o/p will work as a set point for flow controller
then final control signal from flow controller will actuate
the control valve. Thus actual level will achived. 
3  Abhishek Vyas Srf Limited 


Answer 
Cascade Control uses the output of the primary controller
to manipulate the setpoint of the secondary controller as
if it were the final control element.
Reasons for cascade control:
Allow faster secondary controller to handle disturbances in
the secondary loop.
Allow secondary controller to handle nonlinear valve and
other final control element problems.
Allow operator to directly control secondary loop during
certain modes of operation (such as startup).
Requirements for cascade control:
Secondary loop process dynamics must be at least four times
as fast as primary loop process dynamics.
Secondary loop must have influence over the primary loop.
Secondary loop must be measured and controllable.
Reasons not to use cascade:
Cost of measurement of secondary variable (assuming it is
not measured for other reasons).
Additional complexity.
Examples of cascade control:
Control of heat exchanger outlet temperature using steam
flow as secondary loop. 
0  Sanjay Kumar Itbhu 


Question 
what should i conten when company ask me abt tell me
abtyour profile 
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Interview Question Submitted By :: Amit 
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Answer 
when interviwer asked the question just take a brieth and
start from your education background or you are basically
from and where you done your education and what you got in
those education period like awards, medals, if you did
oranise or participate the fest or events what are the
certificates you got from those and where you started you
career and how do you got the job like how well you
performed and at what position you started and now where
are if you get promoted with your performance mention it
and what are the activities you are doing in your job
profile and also what you can handle if you are fresher
just tell where you are strong and what are the
capabulities you have . 
0  Bhasker Reddy Ch 


Answer 
i m rasheed qureshi i m 28 yeare old i m doing mba from shadan collage for boys and i had competed mba first year my specilation i s major finace and minor is marketing i would like to share my family backround my father is policeman my mother is homemaker i have two brother three sisters all is mareied i m aim of my life do good jod and give comfertable life my parends 
0  Arsheed Qureshie 


Question 
M20 Grade ratio?
M30 Grade ratio?
M40 Grade ratio ? 
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Answer Posted By 
Interview Question Submitted By :: Kuppu 
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Answer 
124 
2  Pk 


Answer 
m20 1:1.5:3 
4  R.venkateshwar Rao 


Answer 
1:1 1/2:3 for M20 
3  Sameer 


Answer 
for M15  1:2:4
M20  1:1.5;3
M25  1:1:2
M30  design Mix 
3  R.venkateshwar Rao 


Answer 
M 7.5  1:4:8
M 10  1:3:6
M 15  1:2:4
M 20  1:1.5:3
M 25  1:1.5:2
M 30 design mix 
3  Vejeydeepak 


Answer 
Two tye of mix
1 Nomilal mix
2 Desigen mis
BIS dos not permit that we assume above M25
If we want M25. code suggest us we should go for design mix.
M20 is 1:1.5:3
M25 is 1:1:2 
0  Mahendra Mohan Srivastava 


Answer 
M201.1.5.3
M30MIX DESIGN 
4  Kalpana 


Answer 
1:2:4
1:1.5:3
1:1:2 
0  Naveed 


Answer 
There are two types of mixes.
1Nominal Mix
2Design Mix.
M20(1:1.5:3)we can do by nominal mix as well as design mix.
But M30 & M40 we only do design mix. 
0  Deepak Kumar 


Answer 
1:1 1/2:3, m30 & m40 digen mix only 
0  Muneeswar 


Answer 
M30 mix design & calculation 
0  Suriya 


Answer 
M20 Grade ratio = 1:1.5:3, from
M30 & M40 Grade ratio Design Mix 
3  Ehsan 


Answer 
M2o Grade  1:1.5:3
M30 Grade& M40 Grade  Normaly We Used Disign Mix. 
0  P.senthil Nathan 


Answer 
M20  1:1.5:3
M30 Grade& M40 Grade  Normaly We Used Disign Mix. 
0  Viji.n.b 


Answer 
M201:1:5:3,M30,40,Design mix 
0  P.sivakumar 


Answer 
M 35 1:1.6:2.907 
0  Rvsmani 


Answer 
M 20 1:2:4
M 25 1:1.5:3
m 30& M 40 DESIGN MIX 
0  Murali 


Answer 
m20 1:1.5:3
m30 1:1:2
m40 design mix 
0  Prabhu 


Answer 
THERE ARE TWO TYPES OF MIXES:
1NOMINAL MIX
2DESIGN MIX
1NOMINAL MIX < M30 ITS ALSO CALLED NOMINAL CONCRETE
2DESIGN MIX >= M30  ITS ALSO CALLED CONTROLLED CONCRETE.
SO, M20 IS A NOMINAL MIX AND ITS RATIO IS 1:1.5:3 AND ITS
STRENGHT IS 20 N/MM2.
M30 & M40 ARE DESIGN MIX AND ITS HAS NOT ANY RATIO THESE
ARE MEASURED BY THERE STRENGHT WHICH ARE 30 N/MM2 AND
40 N/MM2 RESPECTIVLY. 
2  Shalu Verma 


Answer 
M7.5  1:4:8
M10  1:3:6
M15  1:2:4
M20  1:1.5:3
M25  1:1:2
M30  design mix 
0  Lakshmi 


Answer 
1:2:4
Design mix
design mix 
0  Natarajan K.s 


Answer 
m20 grade 1:1.5:3
m30 grade Design mix
m40 grade Design mix 
0  Dinesh Kumar.t 


Answer 
mix desing only 
0  Muruganantham 


Answer 
Higher grade of concrete should be done only with Mix Design 
0  Pravin Deshpande 


Answer 
M15(1:2:4), M20(1:1.5:3), M25(1:1:2), M30 is design mix 
0  Teja Singh 


Answer 
M15  1:2:4
M20  design mix as well as nominal mix,and the nominal
mix ratio is(1:1.5:3)
M25  design mix as well as nominal mix,and the nominal
mix ratio is(1:1:2)
M30  design mix 
0  Partha Mitra 


Answer 
1:1.5:3
1:1.5:3
1:1:2 
0  Gaurav Sharma 


Answer 
m20 grade is 1;1.5;3
m30 & m40 grade is mix degisn 
0  Deepak 


Answer 
M5  1:5:10
M7:5  1:4:8
M10  1:3:6
M15  1:2:4
M20  1:1.5:3
M25  1:1:2
M30  only design mix
M40  only design mix 
0  Ranjithkumar T 


Answer 
M201:1.5:3
M30DESIGN MIX
M40DESIGN MIX 
0  Pramod Kumar Singh 


Question 
Moving Iron instruments are applicable with
a) DC only b) AC only c) DC & AC 
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Answer Posted By 
Interview Question Submitted By :: Srikanth 
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Answer 
For Both AC and DC. 
0  Ashwin 


Answer 
only ac 
0  Vivesh Yadav 


Answer 
both ad & DC 
0  Upendrae 


Answer 
AC ONLY 
0  Arul Rajan 


Answer 
both ac aswell as dc 
0  Mahesh Rathod 


Answer 
both ac & dc 
0  Kumar 


Answer 
dc only 
0  Jeff 


Answer 
c) DC&AC 
0  Ashok Kumar Mena 


Answer 
moving iron instruments are applicable for AC as well as DC 
0  Srinu 


Answer 
dc & ac 
0  Chandan Gupta 


Answer 
(c) 
0  Rttrt 


Answer 
both ac&dc (c) 
0  Ramanjaneyulu 


Answer 
DC & AC 
0  Nalini 


Answer 
option c 
0  Divya 


Question 
In which form Government will get the more profit than any
other?
a)Direct taxes b)Indirect taxes c)exise tax d)estate taxe 
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Answer Posted By 
Interview Question Submitted By :: Srikanth 
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Answer 
c)exise tax 
0  Guest 


Answer 
a) Direct Tax 
0  Abcd1236 


Answer 
direct tax 
0  Guest 


Answer 
EXCISE TAX 
0  S Senthil Kumar 


Answer 
2.indireact taxes 
0  Guest 


Answer 
2.indireact taxes 
0  Guest 


Answer 
indirect taxes 
0  Ritika_ch16 


Question 
Which tax is not shared by the cental govt. with the state
govt.
1. Income tax 2. Excise Duty .... 
Rank 
Answer Posted By 
Interview Question Submitted By :: Srikanth 
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Answer 
2. Excise Duty .... 
5  Guest 


Answer 
b) Excise Duty 
0  Abcd1236 


Answer 
Income Tax 
5  K Radhakrishnan 


Answer 
Income tax 
0  Surekha 


Answer 
excise duty 
0  Guest 


Answer 
Excise Duty 
0  Ag 


Answer 
2.excise duty 
0  Guest 


Answer 
2.excise duty 
0  Guest 


Answer 
income tax

0  Guest 


Question 
WHAT SHOUL BE THE RAKE ANGLE WHEN SS IS TO BE MACHINED

Rank 
Answer Posted By 
Interview Question Submitted By :: Guest 
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Answer 
13.5 degree 
0  Ramanuj 


Answer 
WHAT DO U MEAN BY SS? 
0  Sssssss 


Answer 
SS means Stainless Steel 
0  Ramya 


Question 
I want formula to calculate cable size as per load given in
kw & amp.I searched many sites but didn't right answer.Plz
reply me asap. 
Rank 
Answer Posted By 
Interview Question Submitted By :: Ksawasthi 
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Answer 
sorry i dont have the xat formula for that but
for ALUMINIUM CABLE: 1sq.mm = 1.2 A of current
CU: 1sq.mm = 5.0 A of current
and the relation b/w A & KW IS
1KW= 1000*A*240*COS#
A CURRENT
240= VOLTAGE
COS# = POWER FACTOR (.8 TO .99)
NOW IF U KNOW THE EXACT CURRENT LOAD OR LOAD IN THE FORM OF
KW U CAN EASILY FIND THE AMPERE RATING.
AFTER FINDING THE AMPERE RATING U CAN CALCULATE THE THE
SIZE OF THE CABLE. ANKUSH MIGLANI
9718151073
ankushmiglani2000@gmail.com

3  Er. Ankush Miglani 0971815107 


Answer 
You want the appropriate cable size then just apply the
frml P=V*I*Cos#
Where voltage = 0.240
Load is given and cos# lie between 0.8 to 0.9
you can easily get the ampere rating and choosecable size. 
4  Er.Nitesh 


Answer 
i will give you the basic eqaution,
PL = V*I*Pf=S*Pf ; i need to calculate the load current ,
I= PL/(V*Pf); as per ADDC(abu dhabi electricity), Pf=0.9
V=230 volt,
From the load CURRENT i can choose the rated current of
cable, take into account the voltage drop, so refer to
cataloge of any cables and wires company like oman cables
regarding with three phase just put cu(3) in the equations
best regards 
3  Mohammed Motawe 


Answer 
good
3phase cable size calculation formula 
2  Tharik 


Answer 
See dear the basic soultion to cable size calculatiion in
sismple form can be done like this
Vd= ( mv* I * lenghth)*100/(400*1000)
I u can calualte from the Kw value for the particular pf
simple P/554
L required length
mV is the volatage drop/amp/km that can be obtained for the
particluar size of cable from supplier
eg. for 4cx16 its around 2.5 for most suppliers
100/400 is just amultiplication factor for converting it in
to 3 phase
Now do calulation and check if voltage drop limit is below
2.5 or 4 as per your standards
Simple.
But be cutious this is the simplest method and suitabel
method,many factors like grouping factor,derating
factor,spacing factor,type of laying,etc has to be taken
for apt analysis
Software like E Tap can also be utilised 
0  Premgin 


Answer 
mv= (VD*1000)/L*I
VD= VOLTAGE DROP(AS PER COUNTRY STANDARDS)
L = LENGTH OF CABLE
I = CURRENT RATING
I = P/(1.73*V*PF)
PF= POWER FACTOR
MV= MILLI VOLTAGE DROP/AMP/METER
SELECT THE CABLE DEPENDING UPON THE MV RATING IN PRODUCT CATALOGS 
3  Robert Nithin 


Answer 
Voltage drop works on Ohms Law.Multiply the route length in
metres by the the number of ampers of current that the
appliance draws,and then multiply by the number of milivolts
per ampere metre (mV/A.m)
Formula: Vd = L x I x Vc /1000
Where: Vd is the voltage drop measured in volts
L is the length of the cable in metre
I is the circuit current in Ampere
Vc is the millivolts per amper per metre droped
along the cable
1000 is a correction factor applied because Vc is in
millivolts and Vd is in volts. 
0  Nour Travis 


Answer 
Cable size depends on 1)Voltage Drop, 2)Distance, and 3)Load
So u have to calculate first the permissible voltage drop.
For lighting circuit permissible voltage drop:
2% of the rated voltage + 1 volt
2 X 230 /100 +1 = 460/100 + 1 volt = 5.6V
For motoring load
5% of the rated voltage
5 X 415/100 = 20.75 V
Now the formula for calculating voltage drop:
Voltage Drop = I X D (r X 0.85 + Xc X 0.53)/No. of runs X 1000
I : Current
D : Distance
r : Resistance
Xc : Capacitive reactance
If the voltage drop comes within the limits then ur cable
selection is ok. 
0  Anupam Mathur 


Answer 
Hai
First u will convert the KW OR kvA loads to AMph
After u can select the suitable cable from cable manufuture
catalouge . that u will consider derating factor = 0.72
For Example
50 A
16 SQ XLPE Al cable may be suitable
The 16 sqmm cable suitable for 70A ( DATA TAKEN FROM
HAVEELS CATALOUGE)
70 * 0.72 = 50.4 A
So the cable suitable for the above load.
after u will cross check voltage drop for the cable 
0  Bala 


Answer 
Hai
The formula is delda v =
rt3 x I X Z X L/ 1000 x no OF runs
% OF VOLTAGE DROPS = Deta v
 X 100
APPLIED VOLTAGE
The % of voltage voltage drops should be below 3 %
I = Requird current
Z = Cable impedance
L = cABLE LENGTH
First how many Amp you required
Example  80
then you go to cable catalouge find out suitable cable
size
then calculate original current carring capacity of that
cable and multifly with 0.72 ( derating factor )
example in catalouge may be 35 sq mm cable and current
carring capacity may be 125 A
125 X 0.72 = 90
The carring carring capacity point of view this cable will
be ok
next you will check voltage drop with help of above said
fomula 
5  Bala 


Answer 
it is easy,just refer some catalogue from a cable retail shop u idiot. 
0  Shine 


Answer 
dear you can calculate the size of the cable as follow:
first you need to measure the current capacity and it's low as follow:
Kw/(P.F * Voltage that we wanna use)= current
so when you get the current capacity for the load you can get the size from catalogs there is tables gives you the rating of current and how much the size for every rate for this current.
and this current will be ok if we dont have a voltage drop in line of distance between the source and the load.
actually all the distance between the load and the source have a voltage drop so we have to use this law in order to measure the percentage Voltage drop and it has be 2.5% from the load to panels:
V.D = {((x sin@ + Y cos @) x I x L)/ V } x 100%
I is the current that you measured.
L is the distance between the load and the panel.
V is the voltage that we use.
X is the AC resistance.
y is the AC reactance but sometime we ignore it.
X,Y it is depends on the size of cable so when you chose size this factors will control the voltage drop and you can change it sometimes to get the voltage drop rate as 2.5% 
0  Engr. Abed Alraheem 


Answer 
hey hi he needs formula for cable calulation without refer
any catloge 
0  Saran 


Answer 
What is the correct size of cable[4core armoured cable]for
aload of 15kva. 
0  Antony Ngigi 


Answer 
FIRST YOU CALCULATE VOLTAGRDROP
VD=1.732*V*L*I*Z/1000
%VD=VD/RATED VOLTAGE*100
LV CABLE MINIMUM=5%
MV CABLE MINIMUM=3%
V=VOLTAGE
L=LENGTH FOR FEED
I=AMPS
Z=IMPEDANCE 
0  Inudeen 


Answer 
hai am also no exact answer
may be
eg 5HP motor select cable size 2.5sqmm cu cable, r 4 sqmm
Al cable.
work out
5Hp motor taken 90% full load current 7 amps.
that current * 5 times = 35 Amps (motor not run in full load
its my experiance)
2.5sqmm cu cable full load withstand current 36A
4sqmm Al cable full load with stand current 34A
so we choice Cu r Al cable 
0  S.venkatraman 


Answer 
We can use fromula for Voltage Drop Calculation
VD = mVxIxL/1000
VD = Voltage Drop
mV = Milli Volt(Given Rating Cable Manufacture)
Example 16sqmm mV =2.5 mv/a/m
I = Load Current
L = Lenght of Cable
Exapmle #
Voltage = 415vAC, Ampere = 25, Length of Cable = 100Meter
VD = 2.5x25x100/1000
= 6250/1000
= 6.25 (in volt)
= 1.50% (in percent) 
0  Tauqeer Hussain 


Answer 
Kv*load/volt
for single phase use 230 volt& for three phase use 440 volt
Kv =1000 
0  Sukhvinder Singh 


Answer 
Voltage drop Calculation for Exaple 2Run cable
=mV/A/M(Full load current/2)length
for single Run
length x Full load current x mV/A/M/1000
mV/A/M find from cable Catalogue
this is only for Voltage drop 
0  Anubaby 


Answer 
PERCENTAGE OF VOLTAGE DROP IS EQUAL TO
% V DROP = 1.732*Ir*L/1000 ( R COSØ + X SIN Ø ) / V * N
WHERE
Ir = FULL LOAD CURRENT
L = LENGTH OF THE CABLE
R = RESISTENCE OF THE CABLE
X = REACTENCE OF THE CABLE
COSØ = 0.8
SINØ = 0.53
V = VOLTAGE
N = NO. OF RUN CABLE
MAXIMUM % VOLTAGE DROP CONSIDERED 6% As per IE Rule & it cable size designs is Economical.
If Power rating & required cable length is increase , so your cable size is also increase. 
0  Amit Kumar Tripathi 


Answer 
The Power Cable size shall be selected on the basis of
(a) Full load of Current Carrying Capacity
(b) Fault current Rating
(c) Steady state voltage drop
(a) Full load of Current Carrying Capacity
Transformer TRF1 Rating (P) = 1600 KVA
Rated System Voltage (V) = 0.4 KV
Minimum size is required for full load current =P/_/3 x V
=2309.47Amps
Overall derating factor of multicore LV cables =0.660
From Cable catalogue, 1C x 400 Sqmm cable is selected and
Current rating of the cable in air = 680Amps
Therefore 6 cables Run is selected= 4080 Amps
Hence selected cable size is adequate
(b) Fault Current Rating criterion
Since feeder is protected by circuit breakekr, cable size is decided based on the bus of Fault current the transformer feeder .
The required size of cable for fault current is given by
formula =Isc. _/t
K
where,
Isc  Short circuit current in KA = 50KA
t  Fault Clearing time in seconds =1Sec
K  XLPE insulation factor = 0.094
Therefore required cable size = 531.91Sq mm
Hence, Actual cable size choose 6 Run  1C x 400 Sq mm is adequate
(C) Steady state voltage drop
Ir  Full load current of motor = 2309.47Amp
Rated System Voltage (V)= 400V
Cos Ø = 0.85
Sin Ø = 0.53
L  length of the cable =5
N  No of cable runs per feeder =6 Run
R  Resistance of 1C x 400 Sq mm cable =0.104 Ohm / km
X  Reactance of 1C x 400 Sq mm cable =0.07 ohm / km
The voltage drop is given by formula =
√3 x Ir x L/1000 (R cosø1 + X sinø1)/N X V
Therefore voltage drop =0.1044 %
Voltage drop is less than permissible value of 6% 
0  Amit Kumar Tripathi 


Answer 
Dear See 1 eg. of Cable Designing
From  5 MVA power T/f LV side
To  11 kV LA’s
• RMS Symmetrical Short Ckt current = 17.39 kA (As per Tender spec.)
• Fault Clearing Time = 1 sec
• Min. Cable Size = (17.39x1000xsq root 1)/94= 185 sqmm.
• Min. Cable Size = 13C 185 sqmm.
• Cable Length = 0.06 Km. (Assumed).
• Ifl = (5000x1000)/(1.734x11000x0.9x0.95) = 307 A.
• Derating Factor = Ca X Cg = .88x1 = 0.88
• Cable sized considered = 3C X 185 sqmm. (XLPE+Al).
• Cable Resistance (Ohm/Km) = 0.21
• Cable Reactance (Ohm/Km) = 0.087
• Cable Ampacity = 330 A.
• Cable Derated Current = 330x0.88 = 290.4 A.
• Min. No. of cable required = 307/290 = 1.0586 = 1 No.
• No. of Cable Runs Selected = 1 No.
• % Voltage Drop = (sqrt 3x307x0.06(0.21x0.9+0.087x0.43)x100)/(1x11000)
= 0.066 % (Acceptable) 
0  Er. Naushad Ashraf 


Answer 
I dont understand why people are complicating the issue....
the answer is very simple.
Consider Cable selection for the 3ph motor of 1kW
Formula>> P= root(3) x V x I x Cos(Phi) x Eff
p= power... Say 1kW
V= voltage (415Volt)
I= Unknown
Cos(phi)= 0.85.. say
Eff= Efficiency..= 0.85... say
Now,calculating this, we get>> I= 1.9Amp.. say approx 2A
Now derate this current (bcoz, cable will be laid in duct
or undergroung,etc) consider derating factor as 0.7 (say)
Then current is 2A/0.7=2.85A... say 3A..
now see the cable catlogue of any company.. say polycab..
See which size of cable can carry 3A current and use it...
thats it..
Approx.. for 1kW motor, 3Cx 2.5 Sq.mm cable is sufficient
upto 275m length.
NOTE: This is rough method of calculation. If cable length
is more or motor size is more... then voltage drop
calculation is also to be done.
Contact 9665065050 
0  Tushar Jana 


Answer 
you can calculate cable size by this link
http://www.solarwind.co.uk/cablesizingDCcables.html 
0  Muhammad Usama Qadir 


Answer 
i have a load 230 ampere and the length to the MDP is 285
meter the is going to mdp in a pvc duct under ground i need
the formula 
0  Berialay 


Answer 
if u want to find the cable size for a specific load. so u
find the load current. and just divid by 4, similsrly u
find the accurate size of cable for specific load. for
example. a load of 50kw, ist u find the load current, and
then divide by 4.
P = 50kw or 50,000watt
V = 440 volt
I = ?
p = 1.7320*440*I*0.8
I = p/1.7320*440*.8
I = 50,000/598.4
I = 83 Ampere
now u divid the load current by 4
83/4 = 20 sq.mm
its simple if u find the cbale size... 
0  Tariqusman 


Answer 
sorry i remind you that if u determind the above value of
cable size, for example i find 20 sq. mm cble for 83 ampere
load . so u use the 25 sq. mm cable.
sorry for 20 sq mm. there no have 20 sq. 
0  Tariqusman 


Answer 
For 400V 3ph AC system
# For 1% permissible voltage drop
size of cable in mmsq (aluminium cable)=( I*L) /80
# For 2% permissible voltage drop
size of cable in mmsq (aluminium cable)=( I*L) /160
# For 3% permissible voltage drop
size of cable in mmsq (aluminium cable)=( I*L) /240
I = Full load current
L = Length in meter from load center to motor 
0  Abhishek Gupta 


Answer 
as one of our friend said above
for Al its 1.2 amps and for Cu its 5.0 amps per 1 Sq.mm
but actually its
1 .0 amp for Al and 812 amps for Cu [per 1 Sq.mm].
the basic thing is that suppose a cable for load of 100 amps is to be laid then
for Al 100 amps/3 phases=33.33 amps/phases,
as we don't have 33 amps cable take 36 Sq.mm cable (near and above the value) i.e,3 C*36 Sq.mm.
for Cu consider 8 amps for Cu
then 8 Amps*5 Sq.mm =40 Amps per core or phase
i.e,for 100 amps load u need to lay
a cable Al= 3 Core *36 Sq.mm
and for Cu =3 core *5 Sq.mm 
0  Santhosh 


Answer 
as u know power=v*i*power factor
the load is given in KW
SUPPOSE THE LOAD IS 30KW
FOR THREE PHASE VOLTAGE IS 440V
THEN, 30*1000=440*I*O.9(SUPPOSING PF)
30*1000=396*I
THEN, I=75AMP
FOR ALUMINIUM CABLE 1Sq.mm=1.5 amp of current
for copper cable 1sq.mm=5 amp of current
then, your cable size is 15sq.mm for copper cable 
0  Tanu Saxena 


Answer 
sir plz send me proper formula for cable size calculation 
0  Qasim Riaz 


Answer 
Oh Dear..Its so easy...Follow these simple steps (below
link)...
http://www.electricaltechnology.org/2013/10/HowtodeterminethesuitablesizeofcableforElectricalWiringInstallationwithSolvedExamplesinbothBritishandSISystem.html
Titled as "How to determine the suitable size of cable for
Electrical Wiring Installation with Solved Examples (in both
British and Si System) " 
0  Engr Wasim Khan 


Answer 
CABLE SIZING FORMULAS:
1ST STEP CALCULATE THE VOLTAGE DROP (Vd).
(1 ph.) Vd= 2 x I x L x P.F/(K x Area mm2)
(3 ph.) Vd=1.732 x I x L/(KxArea mm2)
where:
I: Load current
L: Length of the conductor.(in meters)
K: 58 for copper conductor and 36 for aluminum conductor.
2 for single phase and sqrt 3 for three phase.
____________________________________________________________
2nd step.
AREA mm2 = 2 X I X L /(K x Vd) (FOR SINGLE PHASE)
AREA mm2 = 1.732 x I x L/(K x Vd)(for three phase)
____________________________________________________________
FORMULAS DESIGNED BY
ENGR.
MUHAMMAD YOUNAS KHAN
M.Sc.Engg.,MIEE(UK)
NEAR KEEKER WALI MASJID.
MOHELLAH LAKER MANDI
WAZIRABAD CITY,PUNJAB
PAKISTAN 
0  Engr.muhammad Younas Khan 


Question 
Why you consider yourself suitable for the post manager
power plant? 
Rank 
Answer Posted By 
Interview Question Submitted By :: Ganga_15 
I also faced this Question!! 
© ALL Interview .com 
Answer 
Ya! I have the confidence that I can do that Job upto the
expected level of the company. 
0  Samuel 


Answer 
well the anwer given by samueal is wrong 
0  Parvinder [Manganese Ore India Limited] 


Answer 
I am pioneer of power plants 34yeas of my experience in
this line and iam gaining in my self for this job. i am
right person for this job and now handle as a HOD power
plant in maihar cement sarla nagar distt. satna MP. 
0  Baboolal Vishwakarma [Manganese Ore India Limited] 


Answer 
As you have seen from my academic records and written
tests, i have the right technical aptitude to serve the
post.This, along with my people management skills, i am
confident that despite if being a fresher, with the right
training and guidance, i will be able able to match up to
your expectations. 
0  Raisaa A [Manganese Ore India Limited] 


Answer 
I believe that my knowledge, attribute, skills, working
experience, and inspiration that the position required
makes me suitable candidate for this post. I can
confidently carry out the task mentioned in your job
description. I consider myself a committed team player who
also relishes challenges and readily assumes responsibility
and accountability in a personal performance role where
initiative is vital. The software expertise gave me a good
foundation to build on. I can add value and make a
worthwhile contribution to the company’s growth with
technical essentials which I have gained during my past
service career. My attitude and temperament best suits the
nature of the job. And therefore, I am eager to enter in a
new working environment. I would like the opportunity to
contribute to the efficient operation of a well known
company and to earn advancement through onthejob
performance. 
3  Neetu Banga [Manganese Ore India Limited] 


Answer 
excellent
Last Updated:29march 2009
Cover Letter Attached With: pioneer, Profile 1
I have been working as power plant engineer in maihar cement
sarla nagar distt. astna mp.and i have34 Year of experience
in a modem Power Plant and experience, plant Erection
,commissoning,maintenance, & operation of thermal Power
Plant. Highly motivated, dependable Licensed First class
Boiler CamptencyProven ability to initiate appropriate
action, follow instructions and carry out tasks in an
efficient manner. Proficient in Machines care, excellent
management, coordination and emergency break down avoider
techniques. Team player with effective interpersonal
communication skills, and a positive, cando attitude.
i am a pioneer &expert of cfbc,fbc ,afbc,boilers and handle
whole plant as a manager now so that consider me for as a
general manager power plant i am a tight condidate for this job. 
0  Baboolal Vishwakarma [Manganese Ore India Limited] 


Answer 
I appreciate answer put by Neetu Banga, I am sure its will
help all of us answering in future. Keep up Neetu Banga! 
0  Lucy Tehran [Manganese Ore India Limited] 


Answer 
Excellent and Ideal answer given by neetu benga... for any post and branch...... Thanku dude.............. 
0  Pavan Kumar [Manganese Ore India Limited] 




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