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| Question |
relation between flow and differential pressure. |
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Answer Posted By |
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Interview Question Submitted By :: Abhinav Prateek |
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| Answer |
Flow is a continuos process of flowing of any liquid.
Differential pressure is the pressure difference between
Suction pressure and Discharge pressure.  |
0 | Ramprasad |
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| Answer |
pressure drop across the flow element is proportional to
the square of the flow rate  |
0 | Manash Ranjan Jena |
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| Answer |
Flow is proportional to the square root of differential
pressure.  |
0 | Sandy |
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| Answer |
If we are using "restricted type flow mesurement principle
such as Orifice, Ventuary, V-Cone flow meters, anu-bar etc.
then the Pressure drop across the element i.e. delat P,
then Flow is proportional to the square root of
differential
pressure.  |
0 | Jpshukla |
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| Question |
explain the working of Coriolis Flowmeter. |
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Answer Posted By |
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Interview Question Submitted By :: Abhinav Prateek |
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| Answer |
When a mass flows through a vibrating pipe, Coriolis forces
are generated which bend and twist the pipe. These very
small pipe deformations are measured by optimally mounted
sensors and electronically evaluated. Because the measured
phase shift of the sensor signals is proportional to the
mass flowrate, the Coriolis Mass Flowmeter measures the
mass flowrate in the flowmeter directly.  |
0 | Manash Ranjan Jena |
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| Question |
what is meant by insulation voltage in cables? explain it? |
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Answer Posted By |
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Interview Question Submitted By :: Victorvgp |
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I also faced this Question!! |
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| Answer |
The cables can be XLPE , PVC etc insulated. now during the
testing the high voltage is applied to the cable and to
test the cable for rupture.Normally the operating voltage
of the cable can be in 1000 volts , but the test voltage is
in KV's e.g 11kv for the short duration.  |
0 | Will |
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| Answer |
Voltage which can carry by cable without getting shock to
person.  |
0 | Kiran Sule [Technip] |
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| Answer |
It is the property of a cable by virtue of it can withstand
the applied voltage without rupturing it is known as
insulation level of the cable.  |
0 | Harpreet Singh [Technip] |
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| Question |
how netral CT is selected (including its details
specification) |
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Answer Posted By |
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Interview Question Submitted By :: Veemandal |
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| Answer |
pls send me the exact answers thanx  |
0 | Imran |
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| Answer |
NCT selected by based on rating of
transformer
Netural CT - Netural current Transformer it can used in
transformer side only
it purpose when a current comes reverse through netural
side means it should sense by current transformer only.
then CT secondary can be connected to relay (ie.,)Earth
Fault Relay. when a current is high means it will sense
then coil will enegrised and gave trip command to breaker.
it is one of the protection of transformer from fault.  |
0 | Abobakkar [Siemens Vai Mt] |
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| Question |
difference b/w eath and neutral |
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Answer Posted By |
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Interview Question Submitted By :: Ramesh |
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| Answer |
Neutral is used to complete the circuit while earthing is a
return path for leakage current  |
0 | Mahesh Patidar |
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| Answer |
earthing is physically connecting to earth where as ground
or neutral is any reference value it could be zero  |
0 | Vasuram |
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| Answer |
Neutral is used to complete the return path for the circuit
while earthing is a path for Fault/leakage current.  |
0 | Steve Mably |
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| Question |
wat is the difference between real power and reactive
power..which is useful..?and how it s useful..wat is the
effect of these on a power system... |
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Answer Posted By |
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Interview Question Submitted By :: Geetha_raj2007 |
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| Answer |
power used in da loads are real and that being wasted culd
be termed as reactive.real is da useful one.  |
0 | Aurobindo Sahoo |
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| Answer |
reactive power is actually a useful power,which is used for
boosting up of voltages,it is the stored energy...
(capacitors),injection of reactive power is necessary at
some cases.  |
0 | Nithya |
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| Answer |
Alternating current
In alternating current circuits, energy storage elements
such as inductance and capacitance may result in periodic
reversals of the direction of energy flow. The portion of
power flow that, averaged over a complete cycle of the AC
waveform, results in net transfer of energy in one
direction is known as real power (also referred to as
active power). That portion of power flow due to stored
energy, that returns to the source in each cycle, is known
as reactive power.
Power triangle The components of AC powerThe relationship
between real power, reactive power and apparent power can
be expressed by representing the quantities as vectors.
Real power is represented as a horizontal vector and
reactive power is represented as a vertical vector. The
apparent power vector is the hypotenuse of a right triangle
formed by connecting the real and reactive power vectors.
This representation is often called the power triangle.
Using the Pythagorean Theorem, the relationship among real,
reactive and apparent power is:
(apparent power)2 = (real power)2 + (reactive power)2
Real and reactive powers can also be calculated directly
from the apparent power, when the current and voltage are
both sinusoids with a known phase angle between them:
(real power) = (apparent power) * cos(theta)
(reactive power) = (apparent power) * sin(theta)
The ratio of real power to apparent power is called power
factor and is a number always between 0 and 1.
To know the Power Triangle & the above concept here is the
hyperlink for this sub:
http://en.wikipedia.org/wiki/Power_factor#Importance_of_powe
r_factor_in_distribution_systems  |
0 | Vasanth Kumar S M |
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| Answer |
Real power is active powe whichis used to do work or to
produce energy & it is V*A*Cos phi whreas reactive power is
the power which is used to magnetise the magnetic field in
electrical motors,transformers,electrical ballasts etc..and
it is V*A*sin phi  |
0 | Shvetang Dave |
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| Question |
How to Calibrate Penumatic Transmitter.LRV= -60 URV= -20.Can
u give me Answer. |
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Answer Posted By |
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Interview Question Submitted By :: Seshu |
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I also faced this Question!! |
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| Answer |
make the calibration set up , to get -60 , give 60 in lp
sidethen adjust zero screw, give 20 in lp side toget -20
url , and adjust span screw.  |
0 | Welcome4ujd |
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| Question |
what is the earthing condition between earth & neutral. |
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Answer Posted By |
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Interview Question Submitted By :: Deepak Garg |
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I also faced this Question!! |
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| Answer |
if you see the voltage level between earth and neutral is
approx 2to3v
this is becoz
earth is at potential zero
but neutral is not at exact zero
it is zero volt with respect to phase but is floating with
respect to earth  |
0 | Glen |
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| Answer |
approx 2to3v  |
0 | Saravanan |
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| Answer |
The neutral is connected to earth at the feeder
transformer. The neutral current (from single phase or
unbalanced loads) flowing through the resistance of the
neutral conductors between your position and the
transformer raises your neutral to earth potential
accordingly.  |
0 | Mark Spencer |
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| Question |
What is the technical reason for adopting color coding of
three phase system as RYB. |
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Answer Posted By |
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Interview Question Submitted By :: Angenushul |
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| Answer |
I think use of colour coding for three phase system is
only for identification . you can use other colour code
also.  |
0 | Prosenjit Majumder |
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| Answer |
The color coding in a conductor is only for identification
purpose.there is no other technical reason for that.  |
0 | Sath [Genus Power Infrastructures Ltd.] |
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| Answer |
It is just a convention and nothing else.  |
0 | Ajit Pal [Genus Power Infrastructures Ltd.] |
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| Answer |
in other country in place of RYB other convention is also
used
please tell me ur email ID  |
0 | Sanjeet Swarnakar [Genus Power Infrastructures Ltd.] |
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| Answer |
First- for Identification Purpose
Second- RYB Electrical standard so every common pepole can
identify
third -All motor or other end side device are mention with
RYB only so they maintain the same in phase system  |
0 | Suni [Genus Power Infrastructures Ltd.] |
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| Question |
How to connect frequency meter in metering circuit?(single
phase and three phase frequency meter)phase to phase or
phase to neutral |
Rank |
Answer Posted By |
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Interview Question Submitted By :: Guest |
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I also faced this Question!! |
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| Answer |
Frequency meter need to connect parallel with the circuit,
as its a sensing device.
there is no such 3 phase frequency meters, measuring from
one phase is more than enough.  |
0 | Rvg.msceb |
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| Answer |
phase to neutral  |
0 | Balaji |
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