When cryogenic control valve will be applied?

1 Answers  

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DEAR SIR/MADAM MY NAME IS ARKAPROVA BHATTACHARYYA.I AM A FRESHER INSTRUMENTATION ENGINEER.CAN YOU PLEASE SEND SOME QUESTION PAPERS OF GRADUATE ENGINEER TRAINEE EXAM OF DVC(DAMODAR VALLY CORPORATION).MY EMAIL IDs ARE arka_aec@rediffmail.com.

0 Answers  

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why is the sleeve of the cable used for?

2 Answers   Jindal,

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A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers  

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why 4 to 20 ma used at 0 set

2 Answers   Borouge, Yokogawa,

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calibration of instruments.

11 Answers   ONGC,

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How you calibrate absolute pressure with the calibration range of 0 to 1000 0C Absolute. Please explain the procedure for calibration.

0 Answers   Petro Rabigh,

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In turbine what does term CDP, NI, NH, HSSOC means.

0 Answers   ADMA OPCO,

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What is voltage free(wet) and potential (dry) contact?

2 Answers  

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I need circuit for RTD senser?

0 Answers  

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How to change dcs card in online. (Dsc is maxdna)

0 Answers  

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Is there is a device to convert mechanical energy to electrical energy

4 Answers  

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