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 Categories >> Engineering >> Instrumentation
 
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Question Asked @ Answers Views     Select
Why do we have earthing cable in branch cable and shield in the same cable?    0  855
What are continuances of connecting earthing and shield of branch cables (instrument to Junction box), at the same earthing pot provided on JB? Is it ok, or may produce some problem?     0  703
Why do we use triad cable for RTD to Temp.transmitter connection? Why we don't use 3 core cable?    1  3841
Why is the length of cable layyed from RTD to temp. Transmitter should be minimum? Why does heating effect takes place in their?    1  2148
What is heating effect?    0  530
What is shielding effect?    0  480
Is it ok, to use non-contact type Radar type LT, on a tank that is half circular from the bottom side? If yes the, isn't the waves gonna bent in other directions?     0  456
Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?    0  359
What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?    0  406
In a ball valve which require 24v dc supply to operate, whose solenoid valve doesn't have any + or - indication, how can we make wiring connectionto solenoid valve?    1  841
How does a single acting, spring return ball valve actually work? Does it require continuous air supply?     0  368
I have installed a RTD whose length is 2250mm(RTD stem length), but it's upper 200 -250mm is out of the reactor, and this upper 200mm stem is surrounded by atmospheric temp. And the lower portion i.e. 2000mm is in contact with the measuring fluid, then does the final measuring temp. Gonna change as the upper 200mm RTD stem is out of reactor?    0  371
If a flow transmitter (magnetic type FT) that can measure flow and temperature, then why in some industries people use flow transmitter and temperature transmitter in the same line 1 after another? Even after 1 single flow FT is capable of measuring flow as well as temperature.    1  1288
If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?    0  171
The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?    0  107
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i need some objective type questions in instrumentation 2248
please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ... 420
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, 405
how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..??? 365
what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ? 939
how to calculate control valve bonnet size?? or how to select its material? 533
how do we commission inergen system? 272
What is zero elevation and zero suppression? 318
what is temperature compensation? 2362
What is the procedure of calibration of Load cell? 321
What are the interlocks we have to check during the start up of LP/HP compressor? 295
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition. 377
Pl send the model question paper of mahagenco account officer post 826
Explain the combusion chamber 270
how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems? 1359
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