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Control System Engineering important questionsMost repeated in SPPU papers

These 13 questions appeared in more than one SPPU Control System Engineering paper we have: 10 papers, from Feb 2023 to Mar 2026. The most-asked come first. Each one links to the papers it was asked in.

All Control System Engineering papers and notes

Repeated questions

Endsem questions (11)

  1. 5×asked

    Derive transfer function of DC servo motor. 

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

  2. 4×asked

    Explain any 4 rules of root locus.

    Nov 2025 ·May 2025 ·May 2024 ·May 2023

  3. 4×asked

    Explain Routh ’ s Hurwitz criterion for stability. Explain special cases of Routh ’ s criterion.

    May 2025 ·May 2024 ·Nov 2023 ·May 2023

  4. 4×asked

    Explain terms gain cross over frequency, phase cross over frequency, gain margin and phase margin in Bode plot.

    May 2025 ·May 2024 ·Nov 2023 ·May 2023

  5. 3×asked

    Explain co relation between frequency domain and time domain.

    Nov 2025 ·Nov 2024 ·May 2023

  6. 2×asked

    Explain lag and lead network with their transfer function.

    Nov 2025 ·May 2023

  7. 2×asked

    State and explain Nyquist Stability Criterion.

    Nov 2025 ·Nov 2023

  8. 2×asked

    Explain correlation between frequency domain and time domain.

    May 2025 ·Nov 2023

  9. 2×asked

    Sketch bode diagram showing GM, PM for i) stable system ii) unstable system iii) marginally stable system.

    May 2025 ·Nov 2023

  10. 2×asked

    Explain different frequency domain specifications.

    May 2024 ·May 2023

  11. 2×asked

    State advantages of Bode plot

    May 2024 ·May 2023

Insem questions (2)

  1. 2×asked

    Compare open-loop & closed-loop systems.

    Mar 2026 ·Feb 2023

  2. 2×asked

    Explain standard test signals with their mathematical expressions.

    Mar 2025 ·Feb 2023

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.