Explain the working principle of variable frequency drive?

0 Answers   ABB,

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Hi at present i m wrking with tire industry as a manager having gud ctc. Nw I am selected for 1 of the best chemical industry but my ctc is lower than current n also i hv 2 compromize vit post as post is also lower. I hv 6 yrs of exp in various type of industry. Should i join chemical industry as there ar lot of gud instrument than tire? Financialy i can manage 4 more 2 yrs. Bt during wrking vit tire industry i found there is very less instrument n feel that opportunity is less. Pl ans quickly. I have less time to decide.

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Technician A says the brake warning light is connected into both the parking and service brake systems. Technician B says the brake warning light will come ON only if the service brake system fails. Who is correct?

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PLEASE PROVIDE SAMPLES OF CHEVRON SKILL TESTS

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What is the procedure of calibration of Load cell?

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typical loop drawing of a simple feedback control comprising of one transmitter and one control

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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

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Hello friends i need check lists of different instruments during the Erection and commissioning in thermal power plant.Please help me.My Mail id is naba02222@gmail.com/naba02222@rediffmail.com Thanks Nabakishore Biswal

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What does threshold mean? what does tolerance mean?

1 Answers   DEWA,

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Can a Differential Pressure Transmitter be used as a normal pressure transmitter??

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In your own words, would you expect an ultrasonic level device to work better in a pressure vessel with a high pressure or a strong vacuum, and why?

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how to check the leak in thermowells

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