Answer / guest

To observe the small structures, it would be necessary to
observe them through a microscope with an increase in
magnification.

why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.

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In control engg. : Differences b/w 1st order & 2nd order system, graphically & theoretically ?

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State bernoulli’s application.

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Name different parts of a pressure gauge. Explain the use of hair spring in the pressure gauge.

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Where is wet leg is used?

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How would you choose differential range?

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what is the input of digital RPM indicator during the calibration time?

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3. Differentiate between ultrasonic flowmeter and radar type flow meter.

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Difine flashing , Cavitaion & Noise? how to minimize these effects

3 Answers   L&T,

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1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling

0 Answers   BARC,

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draw shematic diagram of c/v positioner(smart type)?

0 Answers   Coromandel,

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I saw one P&ID 6" control valve has been connected with 8" process line, and 2" valve also connected in parallel with 6" valve. why the 2" valve connected in parallel, Is there any technical reason. please clarify. With Regards-Kittu

5 Answers   GNFC,

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