Answer Posted / smita

RS232 is a full duplex cable means both transmitting and receiving happens at a time due to this noise will be more so that we can't go for longer distance

RS484 a half duplex cable means in a single time either transmitting or receiving will happen so we can go for a longer distance without disturbance

Can anyone send most commonly asked interview question in Oil & Gas industry

2270

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What is frequency factor in massflow meter? When using frequency output?

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Conversions

2140

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What is Span Error

700

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How digital input and digital output 's are working in dcs

2558

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Yokogawa CENTUMVP R6.09 unable to download to Engineering Station with ExaOPC R3.75 The issue is when I try to download the common project section to the Engineering Station (STN) from the HIS in System View, it is unable to connect. The error displayed is: WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. STN0149 ---- ERROR = 2 WARNING = 1 ---- Background: >Updated the ExaOPC software on the STN from 3.60 to 3.75 >STN operating system is Windows Server 2008 R2 >HIS operating system is Windows Server 2016 Stanard Solutions attempted include: >Ensuring all IP addresses are correct and all networked devices can be pinged. >The ability to ping a device using its host name from another device ( from HIS) >Ensure both devices firewalls are disabled. >The antivirus installed on the STN is disabled. >Ensuring both devices are within the same workgroup. >Added both devices to each other's Host and LMHost files. >Running IT Security tool after changing any administrative settings.

2198

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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

2224

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Explain an adaptive / self-tuning controller’s major draw card.

2333

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basic connection and principle of axial shift sensor n differential sensors in tubine describes n draw......

2377

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What is zener diode? What is voltage regulator?

1108

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I installed the smartplant instrument v8, but can not be opened, that always said: "INTools 2007 hardlock no found". So Could you help me how to do for that?

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how can leve transmetter calibate in feild .and also put cv and flow plz .....

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can you send remote seal interface level transmitter calculation steps for oil water saperator.

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send me last 5 years questions asked in rrb chennai, for section engineer

2112

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Explain about the leakage class of the control valves

2007

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