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Answer Posted / preeti
three wire connections can eliminate connection lead resistance effects from measurements
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What is 3 element control system
i need some objective type questions in instrumentation
Capacitance, resistance ( colour coding ), parallel & series circuits.
What is the start up procedure of desalter
IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?
What is difference between “Fault Tolerant” & “Fault avoidance” PLC? Application where these system s are used?
In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.
how to calculate control valve bonnet size?? or how to select its material?
How d.p. Transmitter can be applied to open tank?
how to turbine speed measurement?
where cascade loop use ?
Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72
Can I calibrate the Electromagnetic Flow Meter on line and How.
why we use cascade control and feed forward control in 3 element drum level control measurement of steam drum .what is cascade and feed forward control system ?give example .
Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com
