INDUSTRIAL INTERVIEW QUESTIONS - Fusion industrial training

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Industrial automation Questions

Interview questions for Industrial Automation Engineers

1 / 10

What is a transmitter?

A device that receives and converts signal into useful output

A device that accepts message signal as input and retransmits it at higher power levels

A device that stores data or information signals in encoded form

A device that processes signals using computer programs

2 / 10

What is the difference between a PLC and a relay?

PLCs require computer programming while relays are hardware circuits.

PLCs can only perform on/off control while relays can perform complex logic.

PLCs are newer technology while relays are obsolete older technology.

PLCs are digital devices while relays are electromechanical devices.

3 / 10

How does a thermocouple work to measure temperature?

By generating a voltage from the junction of two different metals

By measuring the expansion of metals due to heat

By counting the vibration frequency of metal atoms

By correlating the electrical resistance of metals to temperature

4 / 10

What are the commonly used flow measuring instruments?

Turbine flowmeter, Electromagnetic flowmeter, Ultrasonic flowmeter

Bourdon gauge, Bellows, Diaphragm

Thermister, RTD, Thermocouple

Orifice plate, Venturi tube, Pitot tub

5 / 10

Why is 4-20 mA signal preferred over 0-10 V signal in industrial instrumentation?

4-20 mA signals can travel much longer distances without degradation

4-20 mA signals are more accurate than voltage signals

4-20 mA signals are less affected by electrical noise

4-20 mA signals can represent a greater range of values

6 / 10

What is DDE in instrumentation?

A technique for direct digital control of processes

A method for real-time data exchange between Windows applications

A method of controlling analog instruments digitally

A networking protocol for field instrument communication

7 / 10

What are the different components used in automation?

Sensors, actuators, controllers

Resistors, capacitors, inductors

Transmitters, receivers, analyzers

Switches, routers, repeaters

8 / 10

What types of pressure sensors are commonly used for pressure measurement?

All of the above

Capacitive pressure sensors

Strain gauge based pressure sensors

Piezoelectric pressure sensors

9 / 10

What is the typical temperature measurement range supported by RTDs (Resistance Temperature Detectors)?

-50 to 300°C

0 to 100°C

-200 to 850°C

500 to 1000°C

10 / 10

What is an actuator?

A device that detects and measures physical parameters

A device that processes input data and makes decisions

A device that converts electrical signals into mechanical action

A device that transmits and receives signals

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HMI INTERVIEW Q

1 / 20

What future trend is likely to influence HMI development?

Decreased use of technology

Increased automation and AI integration

Simplified interfaces without data

Exclusively manual controls

2 / 20

What role does user feedback play in HMI design?

It complicates design

It helps improve usability

It is not important

It is only for aesthetics

3 / 20

Which colour is often used in HMIs to indicate caution?

Green

Yellow

Red

Blue

4 / 20

What does an alarm function in an HMI do ?

Provides entertainment

Alerts users to abnormal conditions

Decreases system performance

Limits user input

5 / 20

What does a graphical HMI typically include?

Charts and Graphs

Text and Numbers

Only Alarms

None of the above

6 / 20

Which of the following is a benefit of using an HMI?

Increased system downtime

Improved operator interaction

Reduced data accuracy

Increased complexity of operations

7 / 20

What type of display is commonly found in modern HMIs?

CRT

LED

OLED

Touchscreen

8 / 20

What does the designation 2711R-t4t refer to in Allen Bradley products?

A type of PLC module

A model of Panelview Plus

A specific model of Panelview 800 terminal

A programming software version

9 / 20

What is the Panelview 800?

A type of PLC

A series of industrial computers

A range of operator interface terminals

A programming software version

10 / 20

What is the role of HMI in Robotics?

To automate robotic programming

To facilitate user interaction and control of the robot

To enhance the robot’s hardware

To replace the robot’s sensors

11 / 20

What software is used for programming Allen Bradley Panelview 800?

RSlogix 500

FactoryTalk view

Studio 5000

TIA Portal

12 / 20

What is the primary role of HMI in relation to a PLC ?

To perform PLC programming

To provide a user interface for monitoring and control

To replace the PLC

To increase the PLC’s processing speed

13 / 20

Which protocols are commonly used in Allen Bradley HMI development?

FTP and HTTP

Ethernet/IP and DF1

RS- 232 and USB

Modbus and CAN bus

14 / 20

Which of the following tools are commonly used for HMI design and development?

Microsoft Word

Adobe photoshop

Siemens TIA portaal

Autocad

15 / 20

What is an important consideration for security when designing an HMI (Human machine interface) system?

User interface aesthetics

Data encryption and access control

Colour scheme choices

Screen resolution settings

16 / 20

what is the primary role of HMI in industry?

To perform complex data analysis

To provide a user interface for operators to monitor and control machinery

To replace PLCs in automation

To store large amounts of historical data

17 / 20

Which programming language is commonly used for creating HMI systems?

Python

Javascript

All of the above

18 / 20

What is the key difference between HMI and SCADA?

HMI is only for data logging,while Scada is for real time control

HMI is a user interface for individual machines,whereas SCADA manages multiple processes across a network

HMI cannot connect to PLCs but SCADA can

HMI is more complex than SCADA

19 / 20

What is the following is an example of HMI aapplications?

PLC programming

Touchscreen interfaces in manufacturing

Data logging systems

Machine learning algorithms

20 / 20

What is the primary role of HMI in automation?

To control hardware directly

To provide a interface for monitoring and controlling processses

To store data for analysis

To ensure algorithms and calculations

Your score is

The average score is 58%

Electrical Panel Questions

1 / 21

What is SF6 gas commonly used for in electrical systems?

As a refrigerant in cooling systems

As an insulating and arc-extinguishing medium in high-voltage equipment

As a fuel for generators

As a cleaning agent for electrical components

2 / 21

What do the terms “sinking” and “sourcing”?

The types of electrical currents used

The direction of current flow in relation to a device

The methods of measuring voltage

The types of circuit breakers

3 / 21

What is the function of an ELCB (Earth Leakage Circuit Breaker)?

To regulate voltage levels

To protect against overloads

To detect earth faults and prevent electric shocks

To measure electrical current

4 / 21

What is the function of an RCB (Residual Current Breaker)?

To measure electrical voltage

To protect circuits from overloads

To detect and disconnect in case of earth faults or leakage currents

To transform electrical energy

5 / 21

What is an MPCB (Motor Protection Circuit Breaker)?

A device that measures electrical resistance

A circuit breaker designed to protect motors from overload and short circuits

A transformer that converts AC to DC

A switch that controls lighting circuits

6 / 21

What do MCCB and MCB stand for in electrical systems?

Miniature Circuit Breaker and Medium Circuit Breaker

Motor Control Breaker and Main Circuit Breaker

Molded Case Circuit Breaker and Miniature Circuit Breaker

Multi-Current Breaker and Main Current Breaker

7 / 21

What is an ACB (Air Circuit Breaker)?

A device that measures electrical current

A switch that automatically interrupts electrical circuits in case of overloads or faults

A transformer that converts AC to DC

A protective device for lightning strikes

8 / 21

What is a solid-state relay (SSR)?

A mechanical switch that opens and closes circuits

An electronic switching device that uses semiconductor components

A type of circuit breaker

A device that converts AC to DC

9 / 21

What does a bus coupler do in electrical systems?

It measures the electrical load on a bus bar.

It connects two bus bars to allow for power sharing or redundancy.

It transforms voltage levels between circuits.

It acts as a protective device against surges.

10 / 21

What is the main difference between bus bars and bus ducts?

Bus bars are used for high voltage, while bus ducts are for low voltage.

Bus bars are solid conductors, while bus ducts are enclosed channels for power distribution.

Bus ducts are used for measuring current, while bus bars are used for grounding.

There is no difference; they serve the same purpose.

11 / 21

What is a bus bar in electrical systems?

A type of circuit breaker

A conductor that collects and distributes electrical powe

A device for measuring electrical current

A protective device against electrical faults

12 / 21

What is the primary use of a PT (Potential Transformer) in electrical systems?

To convert high voltage to low voltage for measurement

To increase the current in a circuit

To store electrical energy

To protect circuits from overloads

13 / 21

What is a CT in electrical systems?

A device that converts AC to DC

A transformer used to measure electric current

A type of circuit breaker

A tool for measuring voltage

14 / 21

What does SFU stand for in electrical systems?

Single Fuse Unit

Switch Fuse Unit

Safety Fuse Unit

System Fuse Unit

15 / 21

What is the main difference between earthing and grounding?

Earthing is used for safety, while grounding is for electrical performance.

Earthing connects to the earth, while grounding connects to a neutral point.

Earthing is only for AC systems, while grounding is for DC systems

There is no difference; the terms are interchangeable.

16 / 21

What is an isolator in electrical systems?

A device that amplifies electrical signals

A switch used to disconnect a circuit from its power source

A type of circuit breaker

A component that regulates voltage

17 / 21

What is the main difference between a contactor and a relay?

Contactors are used for low voltage, while relays are used for high voltage.

Contactors are designed for high current applications, while relays are typically used for low current applications.

Relays are mechanical devices, while contactors are electronic.

There is no difference; they are the same device.

18 / 21

What is a relay in electrical systems?

A device that amplifies electrical signal

An automatic switch that opens or closes circuits

A type of fuse that protects circuits

A tool used for measuring voltage

19 / 21

What is a contactor in electrical systems?

A device that measures electrical current

A switch used to control a large electrical load

A type of circuit breaker

A component that stores electrical energy

20 / 21

What are the types of panels commonly used in electrical systems?

Circuit breaker panel, fuse panel, and distribution panel

Solar panel, control panel, and power panel

Both A and B

Only one type of panel exists

21 / 21

What is a panel in electrical systems?

A device that generates electricity

A flat board housing circuit breakers and electrical controls

A type of electrical cable

A measurement tool for voltage

Your score is

The average score is 52%

PLC Programming Questions

PLC Programming Practice Questions

Description:
Welcome to our PLC Programming Practice Questions! Whether you are a student studying industrial automation, a professional seeking to enhance your PLC programming skills, or someone interested in understanding the world of Programmable Logic Controllers, this collection of practice questions is designed to help you test and improve your knowledge.

Key Features:

1. Comprehensive Coverage: Our PLC programming practice questions cover a wide range of topics, including ladder logic programming, PLC hardware components, input and output devices, troubleshooting, and more. We aim to provide a well-rounded assessment of your PLC programming expertise.

2. Multiple Difficulty Levels: The questions are categorized by difficulty levels, from beginner to advanced. This allows you to choose questions that match your current level of experience or challenge yourself to master more complex concepts.

3. Real-Life Scenarios: Many questions are designed to simulate real-world industrial scenarios, giving you practical experience in solving PLC programming challenges.

4. Instant Feedback: After answering each question, you will receive immediate feedback on whether your response is correct or incorrect. This instant feedback is essential for reinforcing your understanding.

5. Detailed Explanations: For each question, we provide in-depth explanations of the correct answer and the reasoning behind it. This helps you grasp the underlying principles of PLC programming.

6. User-Friendly Interface: Our user-friendly interface makes it easy to navigate through the questions and track your progress. You can start, pause, and resume your practice session at any time.

7. Time Management: A timer feature is available to help you practice time management skills, a crucial aspect of PLC programming in real-world applications.

8. Access Anywhere: You can access our PLC Programming Practice Questions from your computer, tablet, or smartphone, enabling you to study and practice whenever and wherever it’s convenient for you.

Whether you are preparing for an industrial automation exam, looking to improve your career prospects, or simply eager to explore the world of PLC programming, our practice questions are a valuable resource to test and enhance your skills. Begin your practice session now and take a step closer to becoming proficient in PLC programming.

1 / 26

You have three machines, each equipped with its own set of start and stop buttons. You can operate any two machines simultaneously, or a single machine can run independently. It’s required to design a PLC (Programmable Logic Controller) circuit with suitable interlocking mechanisms to address this scenario.”

2 / 26

Programmable logical controllers are the devices that were invented basically to replace:

switches

circuit breakers

relays

none of the above

3 / 26

The PLC was invented by:

Bill Gates

Dick Morley

Bill landis

Tod cunnigham

4 / 26

The cycle time of a PLC is the time it takes to:

read all the input signals

read all the input signals,run the program and update outputs

read all input signal

check all the input signals against the program

5 / 26

Which of the following functionalities is not possible in the PLC during the “RUN mode”?

Place the processor in the RUN mode

Executes the ladder program and energises output devices

Allows you to perform program entry and editing

Prevents online program editing

6 / 26

Which of the following control devices is used to control/operate industrial equipment?

microprocessor

PLC

DSP

Discrete analog devices

7 / 26

The MVM instruction in PLC stands for:

Move data via direct memory access

Move data from registor to memory

Masked move

Move data memory to memory

8 / 26

The CPU module in the PLC is used to:

9 / 26

The objective of automation is the cause the work system to be automatic such that the system becomes:

self-regulating

self-acting,self regulating and self-reliant all

self-reliant only

self-acting only

10 / 26

Ladder diagram is associated with______

microcontroller

PLC

microprocessor

scada

11 / 26

Electric heater, valve ,relay etc of PLC are

rack devices

output devices

power supply devices

input devices

12 / 26

_________ are used to detect the occurrence of external events. It is a retentive type of instruction and can be reset to zero using the reset(RES) instruction.

Bit instruction

base instructions

call instructions

counter instructions

13 / 26

Which of the following is NOT the correct type of timer instruction available with SLC500 based system?

TOF timer

TON timer

RTO timer

RES timer

14 / 26

Which of the following is NOT one of the logic functions of PLC programming?

INHIBITION

NOT

YES

NOD

15 / 26

Which of the following PLC is not included in a typical block diagram?

chassis

data supply module

cpu

communication infrastructure module

16 / 26

PLC’s analog input/output address value has:

1 byte

1 double word

1 bit

1 word

17 / 26

______ is NOT one of the leading PLC manufactures

MODICON

SIEMENS

ALLEN BRADELY

NEMS

18 / 26

EQC.,LES,LEQ instruction are examples of which of the following instruction?

Data handling instruction

sequencer instuction

comparison instruction

19 / 26

Which of the following PLC is not one of the most common language constructs of programming?

function chart

forward language

ladder diagram

Boolean language

20 / 26

Which generates the output signal according to the logical operations performed on the input signal. PLC function is known as?

control relay functions

counting functions

timing functions

arithmetic functions

21 / 26

Which of the following is NOT an advantage of PLC over electromechanical relay ?

They are designed for an electrically noisy environment, so no extra filtering is required.

They are smaller, faster and more reliable that hardwired systems.

All devices such as drum, switches,timers and counters are implemented using physical controllers.

The outputs may be a mixture of conventional relays and solid-state relays.

22 / 26

What is the use of making ladder logic diagram?

connecting lines and coils

connecting lines with logic gate symbols

wire connection

function blocks and connecting lines

23 / 26

For a 16-bit register, the largest integer number a PLC counter function can reach is:

255

32767

65535

131071

24 / 26

What are the signals PLCs understand?

Analog signals

Digital signals

Both analog and digital signals

Optical signals

25 / 26

Which programming method is often used in industrial automation for complex control sequences and state-based control?

Ladder Logic

Structured Text

SFCs (Sequential Function Charts)

Mnemonics

26 / 26

Which programming method in industrial automation is primarily used for graphical representation of control logic?

Mnemonics

Structured Text

SFCs (Sequential Function Charts)

Ladder Logic

Your score is

The average score is 42%

/10

Industrial automation Questions

Interview questions for Industrial Automation Engineers

1 / 10

How does a thermocouple work to measure temperature?

By counting the vibration frequency of metal atoms

By correlating the electrical resistance of metals to temperature

By generating a voltage from the junction of two different metals

By measuring the expansion of metals due to heat

2 / 10

What is the typical temperature measurement range supported by RTDs (Resistance Temperature Detectors)?

-50 to 300°C

0 to 100°C

-200 to 850°C

500 to 1000°C

3 / 10

What are the different components used in automation?

Sensors, actuators, controllers

Resistors, capacitors, inductors

Switches, routers, repeaters

Transmitters, receivers, analyzers

4 / 10

What is an actuator?

A device that detects and measures physical parameters

A device that processes input data and makes decisions

A device that transmits and receives signals

A device that converts electrical signals into mechanical action

5 / 10

Why is 4-20 mA signal preferred over 0-10 V signal in industrial instrumentation?

4-20 mA signals can travel much longer distances without degradation

4-20 mA signals are more accurate than voltage signals

4-20 mA signals can represent a greater range of values

4-20 mA signals are less affected by electrical noise

6 / 10

What types of pressure sensors are commonly used for pressure measurement?

Piezoelectric pressure sensors

Capacitive pressure sensors

All of the above

Strain gauge based pressure sensors

7 / 10

What is the difference between a PLC and a relay?

PLCs can only perform on/off control while relays can perform complex logic.

PLCs require computer programming while relays are hardware circuits.

PLCs are digital devices while relays are electromechanical devices.

PLCs are newer technology while relays are obsolete older technology.

8 / 10

What is DDE in instrumentation?

A method of controlling analog instruments digitally

A technique for direct digital control of processes

A networking protocol for field instrument communication

A method for real-time data exchange between Windows applications

9 / 10

What are the commonly used flow measuring instruments?

Orifice plate, Venturi tube, Pitot tub

Bourdon gauge, Bellows, Diaphragm

Thermister, RTD, Thermocouple

Turbine flowmeter, Electromagnetic flowmeter, Ultrasonic flowmeter

10 / 10

What is a transmitter?

A device that stores data or information signals in encoded form

A device that accepts message signal as input and retransmits it at higher power levels

A device that receives and converts signal into useful output

A device that processes signals using computer programs

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Your score is

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