- What are the process Variables?
- Define all the process Variable and state their unit of measurement. ?
- What are the primary elements used for flow measurement?
- What are the different types of orifice plates and state their uses?
- How do you identify an orifice in the pipe line?
- Why is the orifice tab provided? 7.What is Bernoulli’s theorem and where it is applicable?
- How do you identify the H. P. side or inlet of an orifice plate in line?
- How do you calibrate a D. P. transmitter?
- What is the seal liquid used for filling impulse lines on crude and viscous liquid ?
- How do you carry out piping for a Different pressure flow transmitter on liquids, Gas and steam services Why ?
- Draw and explain any flow control loop ?
- An operator tells you that flow indication is more, How would you start checking?
- How do you do a zero check on a D.P. transmitter ?
- How would you do Glycol filling or fill seal liquids in seal pots 7 Draw and explain.
- How do you calculate new factor from new range using old factor and old range?
- How will you vent air in the D.P. cell? What if seal pots are used?
- Why flow is measured in square root?
- What is absolute pressure?
- What is absolute zero pressure?
- What is the maximum Vacuum?
- What is Vacuum?
- What are the primary elements for measuring pressure?
- How will you calibrate an absolute pressure transmitter using vacuum manometer. Range 0-400mm abs?
- You are given a mercury manometer range 0 -760 mm ? A vacuum gauge reads 60 mm vacuum. The test manometer reads 50 vacuum ? Which of the two in correct.
- Why is an inclined manometer used ?
- What is the principle of a pressure gauge ?
- Draw and explain a pressure gauge ? What is the used of a Hair spring ?
- Briefly explain the different methods of level measurement?
- Explain how you will measure level with a different pressure transmitter.
- How is D.P. transmitter applied to a close tank?
- How is D.P. transmitter applied to an open tank?
- How is D.P transmitter applied to a close tank & open tank with Dry leg?
- What is purge level system?
- Explain the working of a leveltrol.
- How will you reverse an action of the leveltrol?
- What is interface level? How do you calculate it?
- How will you calibrate a leveltrol in the field?
- How will you calibrate on interface level control. ?
- How will you apply wt. lest calibration to a leveltrol.
- What will happen if the displacer has fallen down while in line ?
- What will happen if the displacer has a hole in it while in line?
- What is the used of Suppression and elevation?
- How will you commission D.P. transmitter in field in pressurized vessel.
- How will you check zero of a level D.P. transmitter while is line?
- Explain the working of an Enraf level gauge?
- What are the different methods of temperature measurement? Explain
- What is Pt 100 mean?
- What is two wire and three wire R.T.D. system?
- Draw a potentiometer temp. Measuring circuits and explain its?
- What is the constant voltage unit?
- Explain the working of a balancing motor.
- What is burnout feature ? Explain
- Why are Thermowells used ?
- What type of sensing element would you use to measure very low temperature ?
- What are skin temperature thermocouples ?
- What is the specialty of thermocouples lead wires ?
- What is the difference the a wheatstone bridge and a potentiometer ?
- Explain the application of proportional integral and derivative action?
- Where is on off control used?
- What is reset-wind up?
- Why is reset called integral and Rate derivative ?
- Explain tuning of controllers.
- Explain the working of an electronic P.I.D. controller.
- What is an analogue integrator and an analogue differentiator ?
- What is an anti reset wind up ?
- What are De-saturators ?
- Explain the working of Rotameter?
- Explain the working of a magnetic meter.
- Explain the working of a turbine meter.
- Explain the working of a Pitot tube.
- Where is the integral orifice used ?
- What are types of taps used for orifices ?
- What is Reynolds number ?
- How would you choose differential range ?
- What is positive Displacement meters ?
- What is a control valves ?
- What are the different types of control valves ?
- What is the use of single seated valve ?
- What is the use of double seated valve ?
- What is Cv of a valve ?
- What are the different types of actuators ?
- What types of bonnets would you use of high temp. and very low temp. ?
- How will you work on a control valve while it is line ?
- What is the use of a valve positioner ?
- When can a by pass be not used on a positioner ?
- What is the use of butterfly valves ?
- What is the use of three way valves ?
- What are the different types of plugs ?
- What is a cage valve ?
- What is the use of link connected to the valve positioner ?
- What is the use of booster relays ?
- What is the use of Angle valves ?
- What are the different valve characteristic ?
- What is a solenoid valve ? Where it is used ?
- How will you change the valve characteristics with positioner ? 110.How will you change the action of a control valve ?
- How will you select the control valve characteristics ?
- What is the effect of pipe reducers on valve capacity?
- An operator tells you that a control valve in a stuck ? How will you start checking ?
- Where is an Air to close and Air to open control valves used ?
- Why does control valve operate at IS psi ?
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Please can I get answers to those question. Thanks