Answer Posted / subash

from field to control room we use lengthy cables.due to the
resistance of the cable may voltage drop occur.hence we
always choose 4-20 ma over a 0 to 10v....if we select 0-20
ma then we can'n distingush between faut condition and
minimum scale....hence we choose 4-20 ma....

in valve is constructed as per SME B 16.34, then which standard is used for fire testing of valve?.

1955

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List three types Level Gauges with their working principles

2037

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installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

2074

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why we are using drum level control valve air to close?

2033

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Programmable Logic control.

1893

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Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.

1846

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i want formula for flow control.am doing project in flow control using orifice . i know value of the flow level(Q) . upstream(p1) pressure, orifice diameter(Do) , pipe diameter(Di) and oil viscosity(Vi) how can i calculate downstream pressure

1857

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Hi Friends , i need one urgent help , i am preparing for M.tech entrance examination , i need some obejective questions related to instrumentation field. where can i get those ? can anyone help me pls ?

1891

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Can anyone convert a 5/2 way or 3/2 way valve into an ISO valve?

874

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If we increase only P what will be controller action ?

2415

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What is three element in drum level?

1350

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What are different types of cable?

1044

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for oil & gas industries which zone is normally preferred? why? give its example?

1938

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How to calibrate the flow transmitter

1545

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any one can send me instrumentation previous interview papers? I prepare for MNC Company Interviews? my mail id- Rakesh.Golla@dodsaldxb.ae , and another mail rakesh.gvk@gmail.com

1900

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