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Question   WHAT IS MEANT BY MECHANICAL ENGINEER? OR WHO IS MECHANICAL ENGINEER? Rank Answer Posted By  
 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? Rank 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? Rank Answer Posted By  
 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? Rank Answer Posted By  
 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 non-linear 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 It-bhu
 
 
Question   what should i conten when company ask me abt tell me abtyour profile Rank Answer Posted By  
 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 ? Rank Answer Posted By  
 Interview Question Submitted By :: Kuppu
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Answer
124
 
2 Pk
 
 
Answer
m-20   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
M20---1.1.5.3
M30---MIX DESIGN
 
4 Kalpana
 
 
Answer
1:2:4
1:1.5:3
1:1:2
 
0 Naveed
 
 
Answer
There are two types of mixes.
1-Nominal Mix
2-Design 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
M20-1:1:5:3,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:-
1-NOMINAL MIX
2-DESIGN MIX

1-NOMINAL MIX < M30 -ITS ALSO CALLED NOMINAL CONCRETE
2-DESIGN 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
M20-1:1.5:3
M30-DESIGN MIX
M40-DESIGN MIX
 
0 Pramod Kumar Singh
 
 
Question   Moving Iron instruments are applicable with a) DC only b) AC only c) DC & AC Rank 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 Rank 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
1-3.5 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 TRF-1 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 	=
	&#8730;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 = 1-3C 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.solar-wind.co.uk/cable-sizing-DC-cables.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 8-12 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/How-to-determine-the-suitable-size-of-cable-for-Electrical-Wiring-Installation-with-Solved-Examples-in-both-British-and-SI-System.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 on-the-job 
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, can-do 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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