ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Instrumentation
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3010)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3270)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13221)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2348)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (407)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (76)
 Bio Engineering interview questions  Bio Engineering Interview Questions (16)
 Metallurgy interview questions  Metallurgy Interview Questions (79)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (162)
 Instrumentation interview questions  Instrumentation Interview Questions (2317)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (104)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (43)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (73)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1189)
Question
what is the basic working principle of I/P and Positioner in 
any control valve.
 Question Submitted By :: Dinesh Sarshiha
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 1
I/P is basiclly working on the flapper and nozzle
principle.And the positioner is working on the Forced
balance principle.
 
Is This Answer Correct ?    92 Yes 7 No
Ramana
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 2
I/P is input (requirement of process/operator) at which
valve needs to be operated.Positioner gives output
(feedback) to control loop about actual position of valve.
Conclusively-I/P-requirement, Positioner-job done
conformation
 
Is This Answer Correct ?    20 Yes 15 No
Rk Singh
 
 
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 3
I/P Converter , converts 4-20 mA signal from controller
to .2 to 1.0 Kg/cm2 pneumatic signal.

Positioner consist of air supply port , signal input port,
out put port.When positioner get in put signal ,it compare
with stem position and output is generated and signal
boosted sufficiently to operate the valve . It uses force
balance system.
 
Is This Answer Correct ?    45 Yes 9 No
Ashok Polampalli
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 4
basic working principle on frequency circuit 
Is This Answer Correct ?    4 Yes 31 No
Aziz
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 5
I/P works on Motion Balance and Positioner works on Force
Balance priciples
 
Is This Answer Correct ?    4 Yes 15 No
Parag Pathak
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 6
It works on force balance principle. A coil is suspended
in a magnetic field on a flexible mount. At the lower end
of the coil is a flapper valve that operates against a
precision ground nozzle to create a backpressure on the
servo diaphragm of a booster relay. The input current flows
in the coil and produces a force between the coil and the
flapper valve, which controls the servo pressure and the
output pressure.Zero adjustment of the unit is made by
turning a screw that regulates the distance between the
flapper valve and the air nozzle. Span adjustmentis made by
varying a potentiometer,which shunts input current past the
coil.
 
Is This Answer Correct ?    37 Yes 3 No
M M Chotrani
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 7
i/p means current to penumatic converter its gives 4-20ma
and hi regulate the penumatic pressur
 
Is This Answer Correct ?    2 Yes 6 No
Rahul D Bhoir
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 8
it's work to forced balanced
principle
 
Is This Answer Correct ?    6 Yes 1 No
Chetan Jodatti
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 9
I/p converter is a heart of
control valve. Positioner is
like a blood circulation.
 
Is This Answer Correct ?    2 Yes 2 No
M.suresh
 
  Re: what is the basic working principle of I/P and Positioner in any control valve.
Answer
# 10
mA ---> Kg/Cm2 ---> % Valve Open

4 ---> 0.2 ---> 0%
8 0.4 25%
12 0.6 50%
16 0.8 75%
20 1.0 100%
 
Is This Answer Correct ?    7 Yes 2 No
Mayank Rathod
 

 
 
 
Other Instrumentation Interview Questions
 
  Question Asked @ Answers
 
micromotion flow meter used for Reliance 3
how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path? Yokogawa 1
how to calibrate the radar transmitter for measuring the exact tank level if tank is having agitator moving continiously because due to agitator tank surface level will vary every time.   2
What is cable size for intrenal wiring in DCS or PLC ,from any card to Terminal amd Why   2
If the average power during generation is zero, why do the analog meters have + and - ? Siemens 1
What is the difference between PLC and DCS?   3
what is the advantage by using PID controller than P& PID?   1
Dear Sir/Madam, I am attending an interview for ETs in BHEL. I have cleared my written test under Electronics (Instrumentation). This is the first time I am appearing for an interview. Can any one who has attended the interview earlier give me a clue to face the interview. With regards Sindhu Siemens 1
I want to know if flowrate increases in 16' pipe line what will happen to upstream pressure and why?   1
Can we measure pressure using differential pressure transmitter? If yes then how? Reliance 3
What is the relationship between GAIN and PROPORTIONAL BAND. SABIC 1
What are the different types of temperature sensors and the principle they work on? GAIL 1
 
For more Instrumentation Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com