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PLC & SCADA important questionsMost repeated in SPPU papers

These 28 questions appeared in more than one SPPU PLC & SCADA paper we have: 11 papers, from Oct 2022 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.

All PLC & SCADA papers and notes

Repeated questions

Endsem questions (24)

  1. 6×asked

    Draw and explain SCADA in automatic substation control?

    Nov 2025 ·May 2025 ·Nov 2024 ·Nov 2023 ·May 2023 ·Nov 2022

  2. 5×asked

    Explain three generation of SCADA Architecture?

    Nov 2025 ·May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

  3. 4×asked

    Explain rule for proper construction of PLC ladder diagram?

    Nov 2025 ·May 2025 ·Nov 2023 ·Nov 2022

  4. 4×asked

    State and explain advantages and disadvantages SCADA System?

    Nov 2025 ·May 2025 ·Nov 2024 ·Nov 2023

  5. 4×asked

    State the desirable properties of SCADA system?

    Nov 2025 ·May 2025 ·Nov 2024 ·May 2023

  6. 3×asked

    Explain ON delay timer in details along with its timing diagram?

    Nov 2025 ·Nov 2023 ·Nov 2022

  7. 3×asked

    Explain Overload protection for AC motor?

    Nov 2025 ·Nov 2023 ·May 2023

  8. 3×asked

    Explain “Adjust and Observe” method of PID Tuning.

    May 2025 ·May 2024 ·Nov 2022

  9. 3×asked

    Explain Open System Interconnection (OSI) model in detail.

    May 2025 ·Nov 2024 ·Nov 2022

  10. 3×asked

    Explain SCADA system implemented for Petroleum Refining Process.

    May 2025 ·Nov 2023 ·May 2023

  11. 3×asked

    Explain the temperature control using PLC with the help of block diagram. 2

    May 2025 ·Nov 2024 ·Nov 2022

  12. 2×asked

    Explain Master Control Relay (MCR) Instruction with diagram?

    Nov 2025 ·May 2025

  13. 2×asked

    Explain speed control of DC motor with DC source with suitable diagram?

    Nov 2025 ·May 2024

  14. 2×asked

    Explain UP counters in details along with its ladder diagram?

    Nov 2025 ·May 2025

  15. 2×asked

    State advantages and Application DCS System?

    Nov 2025 ·Nov 2022

  16. 2×asked

    Draw and Explain AC Motor Starter.

    May 2025 ·May 2023

  17. 2×asked

    Draw and explain the ladder diagram for car parking.

    May 2025 ·Nov 2024

  18. 2×asked

    Explain latching (OTL) and unlatching (OTU) instruction in detail with the example.

    May 2025 ·Nov 2024

  19. 2×asked

    Draw and explain the ladder diagram for bottle filling plant.

    Nov 2024 ·May 2023

  20. 2×asked

    Explain Device Net protocol in detail.

    May 2024 ·May 2023

  21. 2×asked

    Construct a ladder diagram for any one of the following industrial applications. i) ON/OFF Temperature Control ii) Bottle filling plant

    Nov 2023 ·May 2023

  22. 2×asked

    Discuss various methods of PID tuning. Select one of them and explain.

    Nov 2023 ·May 2023

  23. 2×asked

    Explain seven layers of OSI model each with function and associated protocol.

    Nov 2023 ·May 2023

  24. 2×asked

    List various speed control method of DC motor. Explain any one method in brief.

    Nov 2023 ·May 2023

Insem questions (4)

  1. 4×asked

    State and explain advantages and disadvantages of PLC.

    Aug 2025 ·Sep 2024 ·Sep 2023 ·Oct 2022

  2. 3×asked

    Enlist different types of temperature sensors? Explain any one along with its construction, working principle, merits and demerits. 

    Aug 2025 ·Sep 2024 ·Oct 2022

  3. 2×asked

    Describe Overall PLC system explaining the functions of each block in detail.

    Aug 2025 ·Sep 2024

  4. 2×asked

    Explain how to select PLC for particular application.

    Sep 2024 ·Oct 2022

Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.