. Instrumentation and Control Engineering

Instrumentation and Control Engineering


About Indian Space Research Organisation (ISRO)
 India decided to go to space when Indian National Committee for Space Research (INCOSPAR) was set up by the Government of India in 1962. With the visionary Dr Vikram Sarabhai at its helm, INCOSPAR set up the Thumba Equatorial Rocket Launching Station (TERLS) in Thiruvananthapuram for upper atmospheric research. Indian Space Research Organisation, formed in 1969, superseded the erstwhile INCOSPAR. Vikram Sarabhai, having identified the role and importance of space technology in a Nation's development, provided ISRO the necessary direction to function as an agent of development. ISRO then embarked on its mission to provide the Nation space based services and to develop the technologies to achieve the same independently.

Indian Space Research Organisation (ISRO)
 Scientist/ Engineer
 Eligibility  : BE/B.Tech(CSE, Mechanical Engineering, Electrical)
 Location   : Belgaum
 Last Date  : 09 Jul 2015
 Process    : Written-test

 (ISRO) - Job Details
 Advt. No. ISRO HQ:ICRB:03:2015

 Scientist/Engineer Jobs recruitment in Jobs opportunity in Indian Space Research  Organisation (ISRO)
 Eligibility :
 BE/B.Tech or equivalent in First Class with an aggregate minimum of 65% (average of all semesters  for which results are available). Candidates who are slated to complete the BE/B.Tech course in the  academic year 2014-15 are also eligible to apply provided final Degree is available by 30/9/2015.

 Scientist/Engineer 'SC’ [Electronics]/Post Code : BE 001
 No. of Vacancies : 49

 Scientist/Engineer 'SC’ [Mechanical]/ Post Code : BE 002
 No. of Vacancies : 34

 Scientist/Engineer 'SC' [Computer Science]/ Post Code : BE 003
 No. of Vacancies : 26

 Pay Band : Rs. 15,600-39,100/-

 Age Limit : 35 years as on 09.07.2015

 Application Fee :
 There will be an Application Fee of Rs. 100/- (Rupees One Hundred Only) for each application.

Selection Process :
 Written Test. The call letters for the written test to the short-listed candidates will be sent only by e-mail during last week of September 2015. Based on the performance in the Written Test, candidates will be short-listed for interview, the schedule and venue of which will be notified. Written test is only a first level screening and written test score will not be considered for final selection process. Final selection will be based on the performance of the candidates in the Interview and those who secure minimum 60% marks in the interview will be eligible for consideration for empanelment in the selection pane

Test Centre :
 Ahmedabad, Bengaluru, Bhopal, Chennai, Guwahati, Hyderabad, Kolkata, Mumbai, New Delhi and Thiruvananthapuram.

How to apply
The application for on-line registration will be hosted in the ISRO web-site between 19.06.2015 and 09.07.2015. Out of the two challan parts, the candidate has to send one part of the challan form [ISRO copy] to
 Administrative Officer (ICRB), ISRO Headquarters,
 Antariksh Bhavan,
 New BEL Road,
 Bengaluru - 560 094
 by Ordinary Post only superscribing in the envelope “ICRB -Recruitment of Scientist/Engineer ‘SC’ “ within 7 days of filing of application and in any case not later than 17.07.2015.

 Important Dates Last date for Apply Online : 09.07.2015.
 Last date for receiving Application Fee         : 10.07.2015
 The written test will be conducted on            : 11.10.2015

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Amazon Freshers Off-Campus Drive 2015 – 2013/ 2014/ 2015 Passed Out

Good News for Freshers waiting for off campus drives. Amazon is going to conduct Off Campus Drive 2015 for freshers those who have passed out in the years 2014 / 2014 / 2015. Interested job aspirants can apply for Amazon Catalog Associate – Retails Business Services jobs. The Selections were being conducted for Chennai location. Interested people can send their resume on Amaazon website. Job aspirants waiting for good break can apply soon. The Interviews were being held in Amazon Chennai from 9.30 am onwards on 17th June 2015. Candidates those who have completed their Graduate Degree with atleast 55% of aggregate are eligible. That is candidates must be any Graduates / BE / B.Tech from any recognized University / Board can apply for Amazon Catalog Associate Posts. Candidates must attend the Amazon Chennai Interview along with all requisite documents. Candidates with good communication skills and having continuous education without breaks can apply for Amazon freshers job opportunities 2015.

Amazon Freshers Off-Campus Drive 2015 More Details

Job Description : Amazon Off-Campus

Percent               : 55% and above Get access to best jobs, 5 lacs plus salary
                             Any Graduates / BE / B.Tech

 Exp                    : Freshers (2013 / 2014 / 2015 Batch
 Last Date          : Wednesday, June 17, 2015

Walk-in Date    : 17th June 2015

 Time                : 9.30 AM

 Address          : Sakthi Mariyamman Engineering College
                           SMEC Auditorium,

      If you have any questions related in instrumentation and jobs, use the comment box and ask me.


summer internship

Summer internships program is going to conduct in the month of may to july in N.I.T SILCHAR, ASSAM for 3rd year  B.TECH students of Electronics & Instrumentation Engineering. So guys please utilize this because it will helpful in placement and people who thinks about their career going to start in core companies. And companies will give first prefernce. So career is  yours start in a right way.


Urgent Requirement

 Company Name      : RIM Telecable Network Private Limited

 Job Description      :  Maintanence of Dg transformer breakers chiller AC

 Candidates Profile : Strong knowledge in transformer Dg is must.

 Job Location           : Chennai


 Salary Offered        : 7500-15000

 Contact                    : 8508184015

Call to above no to fix the appoinment.

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Freshers Vacancy

Cognizant Hiring 2012, 2013, 2014 & 2015 
Batch Online Apply Link Here===>> http://www.freshersvacancy.net/…/cognizant-hiring-freshers-…
 Job Role        :      Project Associate
 Job Location  :      Across India
 Experience    :      Freshers
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Anna university B.E Electronics and Instrumentation Engineering Syllabus

B.E Electronics and Instrumentation Engineering Syllabus

Anna University of Technology

3rd to 8th Semester Curriculam and Syllabus

Download here : http://www.autmdu.ac.in/syllabus/ELECTRONICS%20AND%20INSTRUMENTATION%20ENGINEERING3_8.pdf

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1. How can level control be installed in steam drum for measuring the level of steam drum?
2. What is ultrasonic flowmeter?
3. Differentiate between ultrasonic flowmeter and radar type flow meter.
4. What is the use of temprature compensation?
5. What is modbus?
6. How signals can be taken through modbus?
7. How earthing can be checked?
8. How many ohms are required for proper earthing?
9. Explain signal isolator.
10. Which wiring connection is preferred in motor for industrial use?
11. What do you mean by trim?
12. How DP Transmitter can be calibrated for crude application in floating roof tank?
13. What is the principle of capacitance type level transmitter?
14. How process line mpm calculation is done?
15. Explain PLC Level and its type?
16. What is procedure on mmwc in to tph?
17. How an rtd work, and what volts/current goes to a RTD to measure the resistance?
18. What is consistency transmitter and describe its working?
19. How to calculate MMWC values into tonnes?
20. How can I make calculation to Install level transmitter (DP) for open tank and close tank?
21. What is difference between DO and DI?
22. What is loop1 and loop2 in MTS LT?
23. How to calibration a control valve?
24. What is dry leg calibration and where is it used?
25. How flow can be measured with dp?
26. Why MMWC unit is used?
27. How HART protocol can be connected with control valves?
28. What is the meaning of slope in PH transmeter?
29. What is Difference between PLC and CNC?
30. If we have 450 mm height boiler drum level, so what is span & zero value for a dpt transmitter?

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1.What is furnace draft control?
Balanced draft boilers are generally used negative furnace pressure. When both forced draft and induced draft are used together, at some point in the system the pressure will be same as that of atmosphere. Therefore the furnace pressure must be negative to prevent hot gas leakage. Excessive vacuum in the furnace however produces heat losses through air infiltration. The most desirable condition is that the one have a very slight negative pressure of the top of furnace.

2.What is intrinsically safe system?
Intrinsic safety is a technique for designing electrical equipment for safe use in locations made hazardous by the presence of flammable gas or vapours in the air. Intrinsically safe circuit is one in which any spark or thermal effect produce either normally or under specified fault conditions is incapable of causing ignition of a specified gas or vapour in air mixture at the most ignited concentration.

3.What is zener diode? What is voltage regulator?
The breakdown region of a p-n diode can be made very sharp and almost vertical diodes with almost vertical breakdown region are known a s zener diodes. A zener diode operating in the breakdown region is equivalent to a battery. Because of this current through zener diode can change but the voltage remains constant. It is this constant voltage that has made the zener diode an important device in voltage regulation.
Voltage regulator: The output remains constant despite changes in the input voltage due to zener effect.

4.What is force balance principle? State some of its’ advantages?
Force balance principle: A controller which generates an output signal by opposing torque. The input force is applied on the input bellows which moves the beam. This crackles nozzle back pressure. The nozzle back pressure is sensed by the balancing bellows which brings the beam to balance. The baffle movement is very less about 0.002 for full scale output.
1. Moving parts are fewer.
2. Baffle movement is negligible
3. Frictional losses are less

5.What is motion balance principle?
A controller which generates an output signal by motion of its parts. The increase in the baffle is to move towards the nozzle. The nozzle back pressure will increase. This increase in the back pressure acting on the balancing bellows, will expand the bellows. The nozzle is moved upward due to this. The nozzle will move until motion almost equals the input baffle motion.

6.How will you test a transistor with a multimeter?
1. Emitter +ve of meter and base -ve output =Low resistance
2. Emitter -ve of meter and base +ve output =High resistance
3. Collector +ve and base -ve output =Low
4. Collector -ve and base +ve output =Low
Emitter: Collector = High resistance
PNP: Opposite Results

7.Explain ratio control system?
A ratio control system is characterized by the fact that variations in the secondary variable don’t reflect back on the primary variable. A ratio control system is the system where secondary flow is hold in some proportion to a primary uncontrollable flow.
If we assume that the output of a primary transmitter is A. and the output of the secondary transmitter is B, and that the multiplication factor of the ratio relay is K, then for equilibrium conditions which means set valve is equal to measured valve, we find the following relation:
KA-B=0 or B/A = K where ‘K’ is the ratio setting off the relay.

8.What is solenoid valve? Where it is used?
A solenoid is electrically operated valve. It consists of solenoid coil in which magnetic plunger moves. This plunger is connected to the plug and tends to open or close the valve. There are two types of solenoid valves:
1. Normally Open
2. Normally closed
Use: It is used for safety purpose in different electric work

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1.What is the use of single seated valve?
The single seated valve is used on smaller sizes where an absolute shut off is required. The use of single seated valve is limited by pressure drop across the valve in the closed or almost closed position.

2.What is the use of double seated valve?
In double seated valves the upward and downward forces on the plug due to reduction of fluid pressure are nearly equalized. It is generally used on bigger size valves and high pressure systems. Actuator forces required are less.

3.What is the use of valve positioner?
Valve positioner can be used for following reasons:
1. Quick action
2. Valve hysterisis
3. Viscous liquids
4. Split range.
5. Line pressure changes on valve
6. Bench set not standard
7. Reverse valve operations

4.What are primary elements of measuring pressure? Which type of pressure can be measured by these elements?
Primary elements of measuring pressure are:
1. Bourdon Tube
2. Diaphragm
3. Capsule
4. Bellows
5. Pressure springs
These elements are known as elastic deformation pressure elements.

5.Name different types of bourdon tubes?
Types of bourdon tubes:
1. C type
2. Spiral
3. Helix

6.What are different types of control valves?
The commonly used control valves can be defined as follows:
a. Depending on Action:
Depending on action there are two types of control valves
1. Air to close
2. Air to close
b. Depending on body:
Depending on body there are 4 types of control valves
1. Globe valves single or double seated
2. Angle valves
3. Butterfly valves
4. Three way valves

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1.How is automatic reference junction compensation carried out in temperature recorders?
In automatic reference junction compensation, variable nickel resistor is used. As the temperature changes, so does its resistance. This reference junction compensator is located, so that it will be at the temperature of the reference junction. The reference junction is at the poset where the dissimilar wire of the thermocouple is rejoined. This joint is invariably at the terminal strip of the instrument.

2.What are de-saturators?
When, in some processes, e.g. batch processes, long transient responses are expected during which a sustained deviation is present the controller integral action continuously drives the output to a minimum or maximum value. This phenomenon is called ‘integral saturation of the control unit’. When this condition is met, then this unit is de-saturated.

3.Explain the working of Rota meter.
Variable area meters are special form of head meters. Where in the area of flow restrictor is varied. So as to hold the differential pressure constant. The rota meter consists of a vertical tapered tube through which the metered fluid flows in upward direction. As the flow varies the ‘float’ rises or falls to vary the area of the passages that the differential across it balances the gravitational force on the ‘float’. The differential pressure is maintained constant. The position of the ‘float’ is the measure of the rate of flow.

4.What is the working principle of the magnetic meter?
An electric potential is developed when a conductor is moved across the magnetic field. In most electrical machinery the conductor is a wire. The principle is equally applicable to a moving, electrically conductive liquid. The primary device of commercial magnetic meters consist of straight cylindrical electrically insulated tube with a pair of electrodes nearly flush with the tube walls and located at opposite end of a tube diameter. This device is limited to electrically conducting liquids. The magnetic meter is particularly suited to measurement of slurries and dirty fluids.

5.Explain the mechanism behind the turbine meter?
Turbine meters consist of straight flow tube within which a turbine or fan is free to rotate about it s axis which is fixed along g the centre line of the tube. Mostly, a magnetic pick up system senses the rotation of the rotor through the tube walls. The turbine meter is a flow rate device
, since the rotor speed is directly proportional to the flow rate. The output is usually in the form of electric pulses from the magnetic pick up with a frequency proportional to the flow rate.

6.How would you choose differential range?
The most common range for differential range for liquid measurement is 0-100. This range is high enough to minimize the errors caused by unequal heads in the seal chambers. It is also dependent on the differences in the temperature of the load lines. The 100 range permits an increased in capacity up to 400. While decrease down up to 20 by merely changing the range tubes or range adjustments.

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