| Other Instrumentation Interview Questions |
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| Question |
Asked @ |
Answers |
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| explain how magnetic flowmeter works |
| 1 |
| What is the meaning of Dry contact and Wet Contact related
to to sensors? |
Emerson | 4 |
| What are three main programming in PLC |
| 3 |
| What is governor of turbine? |
Reliance | 3 |
| 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). |
| 6 |
| In electronic board one fuse(rating 230v,100ma)showing 2.5
ohms with multimeter,then the fuse is healthy or not. |
| 3 |
| what is absolute pressure and where use in process? |
| 2 |
| how we calculate error in percentage when instrument calibrat |
| 1 |
| A pressure differential gauge type of instrument has a
manifold with 2 isolation valves (hp and lp),2 vents(1 each
for hp and lp) and 1 equalizing valve. Determine the
position of each valve(either fully closed or fully open)
when troboulshooting to:
1. zero the transmitter.
2. determine if there is a block in the impulse line.
3. determine if the gauge is functioning properly.
The process fluid is water. |
| 1 |
| hi everybody. right now i am working with thermal power
plant. our company plant is tripped because of program
corrupt. i would like to know is it possible when the plant
is running. we are using FREELANCE ABB800F CONTROLLER. |
| 2 |
| a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of
0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy
of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag
What is the accuracy ratio? is this ratio acceptable? |
| 1 |
| how to calculate density? |
| 1 |
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