# Interview Q & A **URL:** https://forumautomation.com/c/interview-questions-and-answers/32.md?page=1 [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) **Page:** 2 --- ## [What is the difference between Direct measurement and Indirect measurement?](https://forumautomation.com/t/what-is-the-difference-between-direct-measurement-and-indirect-measurement/2970)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [January 14, 2018, 3:44am UTC](https://forumautomation.com/t/what-is-the-difference-between-direct-measurement-and-indirect-measurement/2970 "2018-01-14T03:44:00Z")
Broadly the measurement can be categorized in to two categories Direct measurement 2. Indirect measurement Direct measurement The quantity to be measured is determined directly. Example – Measure distance by scale … --- ## [What are the functions of an Instrument?](https://forumautomation.com/t/what-are-the-functions-of-an-instrument/2972)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [February 10, 2018, 9:29am UTC](https://forumautomation.com/t/what-are-the-functions-of-an-instrument/2972 "2018-02-10T09:29:24Z")
The primary function of an instrument is to measure a process variable. While doing so, it performs several functions such as Transmitting,Signaling,Registering,Indicating,Recording. Transmitting – Instrument sends the … --- ## [Give a brief of Different types of Level Measurement technologies](https://forumautomation.com/t/give-a-brief-of-different-types-of-level-measurement-technologies/1735)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [February 7, 2017, 1:22am UTC](https://forumautomation.com/t/give-a-brief-of-different-types-of-level-measurement-technologies/1735 "2017-02-07T01:22:29Z")
There are many ways to measure level. 1.Differential Pressure / Diaphragm Seal Transmitter measure pressure at the bottom of a tank and converts that pressure to a level reading. 2.Ultrasonic Transmitters Transmitter… --- ## [Top Electrical Interview Questions and Answers?](https://forumautomation.com/t/top-electrical-interview-questions-and-answers/942)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [July 26, 2017, 8:27am UTC](https://forumautomation.com/t/top-electrical-interview-questions-and-answers/942 "2017-07-26T08:27:17Z")
Electrical Engineering Interview Questions and Answers Question 1.Why back emf used for a DC motor ? Answer 1 -The induced emf developed when the rotating conductors of the armature between the poles of magnet in a DC … --- ## [Common Interview Questions: Entry Level Instrumentation](https://forumautomation.com/t/common-interview-questions-entry-level-instrumentation/141)
**Author:** [@instrumen](https://forumautomation.com/u/instrumen)\ **Replies:** 4\ **Last updated:** [December 17, 2020, 9:44am UTC](https://forumautomation.com/t/common-interview-questions-entry-level-instrumentation/141 "2020-12-17T09:44:11Z")
Que. : Draw an electronic two wire system control loop. Que. : What are Intrinsically safe system ? Que. : What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ? Que. : What is force … --- ## [Interview Question - What are the different types of temperature units?](https://forumautomation.com/t/interview-question-what-are-the-different-types-of-temperature-units/1295)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [August 31, 2016, 1:05am UTC](https://forumautomation.com/t/interview-question-what-are-the-different-types-of-temperature-units/1295 "2016-08-31T01:05:42Z")
Different Temperature Scales Are- Celsius - Celsius scale is developed by a Swedish astronomer Anders Celsius. By international agreement the unit degree Celsius and the Celsius scale are currently defined by two diff… --- ## [Definitions of Pressure](https://forumautomation.com/t/definitions-of-pressure/1648)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [January 11, 2017, 4:35am UTC](https://forumautomation.com/t/definitions-of-pressure/1648 "2017-01-11T04:35:14Z")
Pressure - Normal force per unit area exerted by a fluid on a containing wall with respect to a reference. Absolute Pressure - Normal force per unit with respect to zero absolute pressure. Ambient pressure - The pressu… --- ## [What are the measurement error categories?](https://forumautomation.com/t/what-are-the-measurement-error-categories/1625)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [January 4, 2017, 6:16am UTC](https://forumautomation.com/t/what-are-the-measurement-error-categories/1625 "2017-01-04T06:16:42Z")
Measurement errors can be categorized in to two 1.Systematic Error A difference from the true value that is usually constant or proportional to the true value. How Systematic error can be eliminated? Identify the sou… --- ## [16 Interview questions for Oil & Gas electrical engineering Jobseekers](https://forumautomation.com/t/16-interview-questions-for-oil-gas-electrical-engineering-jobseekers/7370)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 2, 2019, 3:27pm UTC](https://forumautomation.com/t/16-interview-questions-for-oil-gas-electrical-engineering-jobseekers/7370 "2019-11-02T15:27:27Z")
1. What is the classification of hazardous area? Hazardous areas are classified into different Zones: Zone 0: an explosive gas-air mixture is present continuously or for long period. Zone 1 : Explosive gas-air mixtu… --- ## [Interview question : Different types of calibration measurement?](https://forumautomation.com/t/interview-question-different-types-of-calibration-measurement/304)
**Author:** [@automate](https://forumautomation.com/u/automate)\ **Replies:** 0\ **Last updated:** [March 10, 2015, 7:29pm UTC](https://forumautomation.com/t/interview-question-different-types-of-calibration-measurement/304 "2015-03-10T19:29:05Z")
Different types of calibration measurement. There are three types of calibration measurement 1.Verify the performance of the test instrument 2.Adjust the response of the test instrument 3.Obtain the correction factors … --- ## [200+ instrumentation interview Q&A](https://forumautomation.com/t/200-instrumentation-interview-q-a/10005)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 1\ **Last updated:** [November 22, 2021, 5:51am UTC](https://forumautomation.com/t/200-instrumentation-interview-q-a/10005 "2021-11-22T05:51:39Z")
1. What is Measurement? This is a function that compares the unknown quantity to the standard, resulting in the knowledge of the unknown quantity’s quantity based on the standard used for comparison. 2. What is a Th… --- ## [SCADA / DCS Engineer Interview question : Troubleshooting of Modbus Communication](https://forumautomation.com/t/scada-dcs-engineer-interview-question-troubleshooting-of-modbus-communication/321)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 5\ **Last updated:** [October 21, 2015, 8:23am UTC](https://forumautomation.com/t/scada-dcs-engineer-interview-question-troubleshooting-of-modbus-communication/321 "2015-10-21T08:23:08Z")
How to troubleshoot Modbus communication problem between DCS / SCADA and third party devices. We may see two types of major error while dealing with modbus communication. No response error CRC error The causes of No … --- ## [What is square root extractor?](https://forumautomation.com/t/what-is-square-root-extractor/2639)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 13, 2017, 8:27pm UTC](https://forumautomation.com/t/what-is-square-root-extractor/2639 "2017-11-13T20:27:18Z")
The high and low-pressure taps of the primary device are fed by sensing lines to a differential pressure (D/P) cell. The output of the D/P cell acts on a pressure to milliamp transducer, which transmits a variable 4-20 m… --- ## [Siemens Interview Questions - Power generation and Electrical Engineering](https://forumautomation.com/t/siemens-interview-questions-power-generation-and-electrical-engineering/827)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [March 5, 2016, 10:05pm UTC](https://forumautomation.com/t/siemens-interview-questions-power-generation-and-electrical-engineering/827 "2016-03-05T22:05:57Z")
1.What are the general causes of power system faults ? 1.Fault current - Healthy insulation in the equipment subjected to either transient over voltage of small time duration due to switching and lighting strokes,direct… --- ## [What are the major categories in Temperature measurement techniques?](https://forumautomation.com/t/what-are-the-major-categories-in-temperature-measurement-techniques/1898)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [April 8, 2017, 3:35pm UTC](https://forumautomation.com/t/what-are-the-major-categories-in-temperature-measurement-techniques/1898 "2017-04-08T15:35:01Z")
Temperature Measurement Techniques A wide variety of methods are employed for temperature measurement.There are broadly split into tow groups. Contact Measurement Thermocouples Thermistors Resistance Temperature Detect… --- ## [Electrical engineer interview question - Switch gear company](https://forumautomation.com/t/electrical-engineer-interview-question-switch-gear-company/825)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 2\ **Last updated:** [March 5, 2016, 9:05pm UTC](https://forumautomation.com/t/electrical-engineer-interview-question-switch-gear-company/825 "2016-03-05T21:05:54Z")
Interview Questions and answers - Electrical engineer,Electrician and Electrical apprentice trainee. 1.What is meant by reach point of a relay? Ans - The farthest point from relay location,which is still inside the zon… --- ## [Electrical engineering Interview questions and answers](https://forumautomation.com/t/electrical-engineering-interview-questions-and-answers/743)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 2\ **Last updated:** [January 31, 2016, 7:54pm UTC](https://forumautomation.com/t/electrical-engineering-interview-questions-and-answers/743 "2016-01-31T19:54:44Z")
Electrical - Interview questions and answers 1.What is meant by regenerative breaking? When the supply is cut off for a running motor,it still continue running due to inertia.In order to stop it quickly we place a load… --- ## [What is Normally Open and Normally Close switch ? How to implement logic gates with NO and NC switch?](https://forumautomation.com/t/what-is-normally-open-and-normally-close-switch-how-to-implement-logic-gates-with-no-and-nc-switch/1751)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [February 12, 2017, 7:23pm UTC](https://forumautomation.com/t/what-is-normally-open-and-normally-close-switch-how-to-implement-logic-gates-with-no-and-nc-switch/1751 "2017-02-12T19:23:08Z")
Boolean logic is represented by two states. True = 1 False = 0 This is also known as a digital state. Normally Open Switch State 0 When the switch has no information or a reading of ‘false’ or ‘0’ state,then no i… --- ## [Power plant engineering based Interview question](https://forumautomation.com/t/power-plant-engineering-based-interview-question/3239)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 5, 2018, 3:16pm UTC](https://forumautomation.com/t/power-plant-engineering-based-interview-question/3239 "2018-03-05T15:16:09Z")
1. What are major circuits in a steam power plant? Feed water and steam circuit Air and fuel gas circuit Cooling water circuit Coal and ash circuit 2. What is penstock? The pipe between surge tank and prime… --- ## [What is the difference between accuracy and precision in measurement?](https://forumautomation.com/t/what-is-the-difference-between-accuracy-and-precision-in-measurement/10882)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 0\ **Last updated:** [February 16, 2023, 5:19am UTC](https://forumautomation.com/t/what-is-the-difference-between-accuracy-and-precision-in-measurement/10882 "2023-02-16T05:19:22Z")
In measurement and instrumentation, both accuracy and precision are important, but they mean different things. Accuracy is how close a measured value is to the real value of the thing being measured. In other words, it i… --- ## [Interview Questions : Control Valve technician / Instrument Technician](https://forumautomation.com/t/interview-questions-control-valve-technician-instrument-technician/389)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [July 9, 2019, 8:02pm UTC](https://forumautomation.com/t/interview-questions-control-valve-technician-instrument-technician/389 "2019-07-09T20:02:51Z")
State the function of Valve 2.Describe the three types of Valve 3.List the four uses of pressure control valve 4.Describe two types of relief valve 5.State the difference in cracking pressure and full flow pressure 6.De… --- ## [100+ Electrical Engineering Interview Questions](https://forumautomation.com/t/100-electrical-engineering-interview-questions/10000)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [November 18, 2021, 6:45am UTC](https://forumautomation.com/t/100-electrical-engineering-interview-questions/10000 "2021-11-18T06:45:03Z")
1. What is Electrical Engineering? It is the study and application of electricity, electronics, and electro mechanism. 2. What is a capacitor? It is an electrical component that opposes the flow of current and behaves… --- ## [Instrumentation Interview Question : Pressure measurement](https://forumautomation.com/t/instrumentation-interview-question-pressure-measurement/350)
**Author:** [@automate](https://forumautomation.com/u/automate)\ **Replies:** 2\ **Last updated:** [March 25, 2023, 6:26am UTC](https://forumautomation.com/t/instrumentation-interview-question-pressure-measurement/350 "2023-03-25T06:26:01Z")
Q)What is pressure ? or Define pressure ? A)Pressure is the amount of force applied over a defined area. Q)The factors that will influence hydro static pressure ? A)Level of the liquid Density of the liquid Pressure o… --- ## [CLASSIFICATION OF MICROCONTROLLER AND ITS DIFFERENCE BETWEEN MICROPROCESSOR](https://forumautomation.com/t/classification-of-microcontroller-and-its-difference-between-microprocessor/6009)
**Author:** [@ashlin](https://forumautomation.com/u/ashlin)\ **Replies:** 0\ **Last updated:** [March 3, 2019, 5:36am UTC](https://forumautomation.com/t/classification-of-microcontroller-and-its-difference-between-microprocessor/6009 "2019-03-03T05:36:55Z")
MICROCONTROLLER A microcontroller is a system on a chip (SOC) it has CPU, I/O ports, timers, RAM, ROM on a single chip or it is like integrated on a single chip. Microcontrollers are designed fo… --- ## [Top Calibration interview questions and answers](https://forumautomation.com/t/top-calibration-interview-questions-and-answers/4042)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [July 7, 2018, 5:38pm UTC](https://forumautomation.com/t/top-calibration-interview-questions-and-answers/4042 "2018-07-07T17:38:06Z")
What is calibration? The process of adjusting test and product equipment to confirm the standards for the instrument and verify their compliance with the standards is the process of calibration. What is the range of … --- ## [Important Interview Questions based on CONTROL VALVE](https://forumautomation.com/t/important-interview-questions-based-on-control-valve/3261)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 10, 2018, 2:28pm UTC](https://forumautomation.com/t/important-interview-questions-based-on-control-valve/3261 "2018-03-10T14:28:42Z")
1. What is a control valve? A control valve is the final control element, which directly changes the valve of the manipulated variable by changing the rate of flow of control agent. A control valve consists of an operat… --- ## [100+ PLC interview questions](https://forumautomation.com/t/100-plc-interview-questions/9973)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [November 10, 2021, 10:03am UTC](https://forumautomation.com/t/100-plc-interview-questions/9973 "2021-11-10T10:03:20Z")
1. What is PLC? PLC is a combination of software and hardware that stands for Programmable Logic Controllers. It is an industrial computer used to regulate the outputs by monitoring inputs and processing the device base… --- ## [PLC engineer interview question?](https://forumautomation.com/t/plc-engineer-interview-question/478)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [February 12, 2018, 12:25pm UTC](https://forumautomation.com/t/plc-engineer-interview-question/478 "2018-02-12T12:25:49Z")
PLC programmer / PLC engineer interview questions What is sinking input and sourcing input/Output ? Sinking input / output provides a grounded connection to the load Sourcing input / output provides to the load 2.Wh… --- ## [Interview questions based Process Control Engineering](https://forumautomation.com/t/interview-questions-based-process-control-engineering/3279)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 13, 2018, 4:44pm UTC](https://forumautomation.com/t/interview-questions-based-process-control-engineering/3279 "2018-03-13T16:44:18Z")
1. Define process Any system comprised of a dynamic variable usually involved in manufacturing and production operations. It is defined as a series of operations during which some materials are placed in more useful stat… --- ## [Communication between OPC DA and OPC client](https://forumautomation.com/t/communication-between-opc-da-and-opc-client/7019)
**Author:** [@Anas\_1990](https://forumautomation.com/u/Anas_1990)\ **Replies:** 2\ **Last updated:** [February 25, 2023, 7:55pm UTC](https://forumautomation.com/t/communication-between-opc-da-and-opc-client/7019 "2023-02-25T19:55:23Z")
Dears, I have three different PLCs in my company .they share data with our central unit using GPRS network and using OPC DA for each Brand. I want to know if it’s possible to develop one OPC client to share data providi… --- ## [Piping Interview Questions](https://forumautomation.com/t/piping-interview-questions/3356)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 29, 2018, 3:57pm UTC](https://forumautomation.com/t/piping-interview-questions/3356 "2018-03-29T15:57:33Z")
1 . What is NPSH? Answer: NPSH: Net Positive Suction Head It is the measure of the pressure drop of the liquid as it moves from the inlet of the pump to the eye of the impeller, determined by testing and expressed in f… --- ## [Here are some good ways to understand HART communication or HART protocol?](https://forumautomation.com/t/here-are-some-good-ways-to-understand-hart-communication-or-hart-protocol/4811)
**Author:** [@rajeena](https://forumautomation.com/u/rajeena)\ **Replies:** 0\ **Last updated:** [October 1, 2018, 4:04pm UTC](https://forumautomation.com/t/here-are-some-good-ways-to-understand-hart-communication-or-hart-protocol/4811 "2018-10-01T16:04:54Z")
Here are some good ways to understand HART communication or HART protocol? What Is Hart? The HART Communication Protocol (HART = Highway Addressable Remote Transducer). HART is a master-slave communication protocol, w… --- ## [Questions and Answers for Electrical Interview](https://forumautomation.com/t/questions-and-answers-for-electrical-interview/930)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [March 29, 2016, 5:30am UTC](https://forumautomation.com/t/questions-and-answers-for-electrical-interview/930 "2016-03-29T05:30:31Z")
1.Explain different types of fault? There are basically two types of fault. a)Shunt faults - Basically shunt faults are short circuits.When the path of the load current is cut short because of breakdown of insulation,w… --- ## [Interview questions based on Allen Bradley PLC](https://forumautomation.com/t/interview-questions-based-on-allen-bradley-plc/2585)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 5, 2017, 6:00pm UTC](https://forumautomation.com/t/interview-questions-based-on-allen-bradley-plc/2585 "2017-11-05T18:00:45Z")
What are the software used with AB? Pico soft for Pico PLC programming RS Logic 500 for Micrologix and SLC PLC programming RS Logic 5000 for control logix How are communication protocols distinguished? Commu… --- ## [Electrical Engineer - Interview questions (Basic electrical engineering )](https://forumautomation.com/t/electrical-engineer-interview-questions-basic-electrical-engineering/522)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [October 18, 2015, 6:48am UTC](https://forumautomation.com/t/electrical-engineer-interview-questions-basic-electrical-engineering/522 "2015-10-18T06:48:46Z")
Electrical engineer interview questions - basic electrical engineering 1.Define electric current ? Electric current is the movement or flow of electrons through a conductive material 2.Define “emf” / Electromotive forc… --- ## [What are the basic components of an Electric Motor?](https://forumautomation.com/t/what-are-the-basic-components-of-an-electric-motor/1458)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [October 22, 2016, 4:28pm UTC](https://forumautomation.com/t/what-are-the-basic-components-of-an-electric-motor/1458 "2016-10-22T16:28:58Z")
Basic Components of Electric Motor 1.Rotor Core 2.Winding 3.Terminal Box 4.Hood to ventilation fan 5.Bearings 6.Output shaft 7.End shields 8.Mounting base 9.Ribbed housing --- ## [What are the steps involved in cable sizing?](https://forumautomation.com/t/what-are-the-steps-involved-in-cable-sizing/1344)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [September 11, 2016, 5:47am UTC](https://forumautomation.com/t/what-are-the-steps-involved-in-cable-sizing/1344 "2016-09-11T05:47:22Z")
The major steps involved in the process of cable sizing are 1.Gather Data about the cable,its installation conditions,the load that it will carry. Load Data- Number of phases - Single phase or three phase. Voltage - … --- ## [What are the tests conducted on a circuit breaker?](https://forumautomation.com/t/what-are-the-tests-conducted-on-a-circuit-breaker/1334)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [July 9, 2024, 3:38am UTC](https://forumautomation.com/t/what-are-the-tests-conducted-on-a-circuit-breaker/1334 "2024-07-09T03:38:07Z")
As such the IEC standards governing Circuitbreaker / Isolators is IEC 62271-1-2007 the following are the tests conducted on a Circuit Breaker : Power Frequency voltage withstand test Lightning Impulse Withstand te… --- ## [Instrumentation Interview Questions - Based on Temperature measurement](https://forumautomation.com/t/instrumentation-interview-questions-based-on-temperature-measurement/6266)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [April 18, 2019, 3:24pm UTC](https://forumautomation.com/t/instrumentation-interview-questions-based-on-temperature-measurement/6266 "2019-04-18T15:24:01Z")
1. What are the main reason for temperature measurement? Answer: The important reasons for temperature measurement are: To ensure the safety of personnel and equipment by maintaining temperatures within design limits. … --- ## [Modbus based interview questions](https://forumautomation.com/t/modbus-based-interview-questions/2653)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 15, 2017, 6:20pm UTC](https://forumautomation.com/t/modbus-based-interview-questions/2653 "2017-11-15T18:20:47Z")
What is Modbus Protocol? Modbus is a serial communication protocol is developed by MODICON inc. Modbus devices use master-slave communication technique in which only one device(master) can initiate the transaction and… --- ## [Common interview questions :Entry level automation/Control system engineers](https://forumautomation.com/t/common-interview-questions-entry-level-automation-control-system-engineers/138)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [October 12, 2014, 3:07pm UTC](https://forumautomation.com/t/common-interview-questions-entry-level-automation-control-system-engineers/138 "2014-10-12T15:07:03Z")
Draw system architecture showing PLC, SCADA/MMI, networking devices communication protocol details like IP address etc. Draw detailed block diagram of any field parameter like temp, pressure reading coming to PLC can be… --- ## [Electrical Engineer Interview Questions - General Electrical Terms](https://forumautomation.com/t/electrical-engineer-interview-questions-general-electrical-terms/291)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [March 7, 2015, 9:37pm UTC](https://forumautomation.com/t/electrical-engineer-interview-questions-general-electrical-terms/291 "2015-03-07T21:37:55Z")
Electrical Engineer / Electrician Interview question General terms used in electrical engineering Inrush Current This is the peak current that occurs when power is first applied to a unit. It is measured in peak amperes … --- ## [Maple Systems HMI send ASCII message to Vorne board via Serial](https://forumautomation.com/t/maple-systems-hmi-send-ascii-message-to-vorne-board-via-serial/8161)
**Author:** [@JamesProtheroe](https://forumautomation.com/u/JamesProtheroe)\ **Replies:** 1\ **Last updated:** [July 6, 2021, 7:59am UTC](https://forumautomation.com/t/maple-systems-hmi-send-ascii-message-to-vorne-board-via-serial/8161 "2021-07-06T07:59:16Z")
I am trying to send ASCII messages over serial from a Maple systems model: HMI5121P to an older Vorne Industries serial input alphanumeric display board model: GY2200. Has anyone done this? Any guidance would be greatly … --- ## [Power plant interview question](https://forumautomation.com/t/power-plant-interview-question/5810)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 28, 2019, 5:47pm UTC](https://forumautomation.com/t/power-plant-interview-question/5810 "2019-01-28T17:47:58Z")
What are the main circuits in the Thermal Power Plant? Feed water and steam flow circuit Coal and ash circuit Air and gas circuit Cooling water circuit On which cycle thermal power plant works? Thermal power plant work… --- ## [What is Proportional Integral Derivative Control (PID)?](https://forumautomation.com/t/what-is-proportional-integral-derivative-control-pid/1727)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [February 4, 2017, 5:28pm UTC](https://forumautomation.com/t/what-is-proportional-integral-derivative-control-pid/1727 "2017-02-04T17:28:41Z")
PID - Proportional Integral Derivative Controller The PID function uses system feedback to continuously control a dynamic process. The purpose of PID control is to keep a process running as close as possible to a desir… --- ## [QA/QC engineer basic Interview questions](https://forumautomation.com/t/qa-qc-engineer-basic-interview-questions/6321)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [April 30, 2019, 7:19pm UTC](https://forumautomation.com/t/qa-qc-engineer-basic-interview-questions/6321 "2019-04-30T19:19:34Z")
What is QA/QC? Answer: QA - Quality assurance QC - Quality control This QA/QC is intended to determine the sequence of requirements for material quality, work, inspection and recording. What are the basic required doc… --- ## [What are the types of Linear displacement transducers?](https://forumautomation.com/t/what-are-the-types-of-linear-displacement-transducers/2351)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [September 27, 2017, 11:44am UTC](https://forumautomation.com/t/what-are-the-types-of-linear-displacement-transducers/2351 "2017-09-27T11:44:05Z")
Resistive potentiometer LVDT Strain gauge Capacitive transducer Variable inductance transducer Piezoelectric transducer Photo electric transducer Hall effect transducer Digital transducer --- ## [Interview Question : Hazardous Area Zoning](https://forumautomation.com/t/interview-question-hazardous-area-zoning/260)
**Author:** [@automate](https://forumautomation.com/u/automate)\ **Replies:** 1\ **Last updated:** [August 4, 2016, 5:12am UTC](https://forumautomation.com/t/interview-question-hazardous-area-zoning/260 "2016-08-04T05:12:58Z")
Two types of standards are there For Europe CENELEC – in process of being transferred to IEC/EN (European Committee for Electrical Standardization) IEC (International Electrotechnical Commission) North America NEC 500… --- ## [Top interview questions on flow measurement](https://forumautomation.com/t/top-interview-questions-on-flow-measurement/2420)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 10, 2017, 1:13pm UTC](https://forumautomation.com/t/top-interview-questions-on-flow-measurement/2420 "2017-10-10T13:13:19Z")
What are the types flow meters? Orifice meter Pilot tube Rotameter Electromagnetic flowmeter Turbine type flowmeter Vortex type flowmeter What is Zero check and Static zero check on a DP flow transmi… --- ## [Explain the basics of Open loop and Closed loop control system](https://forumautomation.com/t/explain-the-basics-of-open-loop-and-closed-loop-control-system/2023)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [May 29, 2017, 6:51pm UTC](https://forumautomation.com/t/explain-the-basics-of-open-loop-and-closed-loop-control-system/2023 "2017-05-29T18:51:24Z")
Open Loop Control System. Key point for open loop system is there is no feedback. That means controllers output doesn’t affect its subsequent input. Open loop control system can take input from process as long as con… [Previous page](https://forumautomation.com/c/interview-questions-and-answers/32.md?per_page=50) [Next page](https://forumautomation.com/c/interview-questions-and-answers/32.md?page=2&per_page=50)