THEORY EXAMINATION (SEM–VIII) 2016-17 INDUSTRIAL AUTOMATION-I

Section A – Basic Concept Questions (Description)

Section A consists of short answer questions that test the basic understanding of Industrial Automation concepts. Students are expected to write brief explanations of important terms related to automation technologies used in modern industries.

This section focuses on fundamental topics such as automation types, controllers, automation strategies, SCADA systems, data acquisition, and automation levels. Students must understand the differences between hardware, software, and firmware, and also know the working principles of industrial components like relays and solenoids.

These questions help students build a strong foundation in industrial automation systems and understand how automation technologies are used to improve productivity, efficiency, and safety in industrial processes.

Since the answers are short, students must provide clear and precise definitions or explanations of the concepts asked.

Questions for Section A

What is automation? Explain its different types.

What are the different types of controllers used in industrial automation?

What automation strategies are commonly used in industries?

What are the advantages of flexible automation?

What is SCADA and how is it used in industrial systems?

Explain the different levels of automation with a flow chart.

Compare hard automation and soft automation.

What is data acquisition in automation systems?

What is the difference between hardware, software, and firmware?

What are relays and solenoids?

Section B – Descriptive Questions (Description)

Section B includes descriptive and analytical questions that require detailed explanations of automation systems and industrial control methods. Students are expected to explain concepts with diagrams, circuit representations, and technical descriptions.

This section focuses on topics such as Programmable Automation Controller (PAC) architecture, Human Machine Interface (HMI), ladder logic programming, electrical control circuits, valves used in automation systems, and relay operations.

Students must also understand logic gate operations using ladder logic, including AND, OR, NOT, and NAND gates. These concepts are essential for designing control systems in industrial automation.

Another important topic in this section is latching in ladder logic, which is commonly used in automation control systems for maintaining the state of a device after activation.

Answers in this section should be detailed and may include diagrams, examples, and explanations of system components.

Questions for Section B

Explain the architecture of a Programmable Automation Controller (PAC) with a schematic diagram.

Draw electrical circuits and ladder logic diagrams for the following logic gates:

AND

OR

NOT

NAND

What is a Human Machine Interface (HMI) and why is it important in automation systems?

Compare hard automation and soft automation. What are the advantages of flexible automation?

Draw and explain symbols for the following components:

Pressure Relief Valve

2/2 Valve with push button and spring actuator

4/2 Valve

Direction valve

Explain the working of a mechanical switch (relay).

Explain the concept of latching in ladder logic with a suitable example.

Section C – Long Analytical Questions (Description)

Section C contains long analytical and application-based questions related to industrial control systems. Students are expected to apply theoretical knowledge to real industrial automation scenarios.

One of the questions involves designing ladder logic for controlling a single-phase motor using START, STOP, and TEST push buttons. In this case, the motor should remain ON after pressing the START button and should turn OFF when the STOP button is pressed. The TEST button is used to check whether the motor is running properly. This question evaluates the student’s ability to design and understand automation control logic. The diagram related to this motor control system is shown in the exam paper on page 2. 

Another topic included in this section is Sequential Function Chart (SFC) and Functional Block Diagram (FBD), which are programming methods used in programmable logic controllers (PLC).

The section also includes questions about SCADA systems, where students must explain the role of SCADA in modern industrial automation and describe its subsystems such as data acquisition, communication systems, and control centers.

Questions for Section C

Design ladder logic to control a single-phase motor using START, STOP, and TEST push buttons.

Explain the following:

Sequential Function Chart (SFC)

Functional Block Diagram (FBD)

Discuss the importance of SCADA in modern industrial automation. Explain the subsystems of SCADA in detail.