💡 DSU Exam Strategy & Guidance

Focus on: (1) Circular Economy model vs Linear Economy, Product Stewardship, and Life Cycle Assessment (LCA); (2) Sustainable Material Sourcing, Embodied Energy, and Decarbonization; (3) Thermodynamics and Energy Efficiency (Modes of heat transfer - Conduction, Convection, Radiation, Bernoulli’s fluid equation in inclined pipes, Thermal engine efficiency); (4) UN Sustainable Development Goals (SDGs) and role of engineers in global sustainability.

High-Yield Passing Strategy: Focus on Circular Economy principles, Product Stewardship definitions, Bernoulli equation inclined pipe numericals, and Engine thermal efficiency calculations.

Most Repeated Question Topics:

Circular Economy vs Linear Take-Make-Dispose ModelProduct Stewardship & Life Cycle Assessment (LCA)Sustainable Sourcing & Embodied Energy ReductionModes of Heat Transfer (Conduction, Convection, Radiation)Core Principles of Sustainable Engineering DesignBernoulli’s Equation Fluid Flow in Inclined Pipe NumericalHeat Engine & Thermal Efficiency NumericalsUN Sustainable Development Goals (SDGs) for Engineers

🔥 Most Predictable Exam Questions (2)

95% Probability 8 Marks Module 1: Circular Economy & Sustainability

Q1. Compare the Linear Economy (Take-Make-Dispose) with the Circular Economy (3R: Reduce, Reuse, Recycle) model. Explain Product Stewardship and the 5 stages of Life Cycle Assessment (LCA).

Key Points: Draw butterfly circular economy diagram. Linear model produces massive landfill waste and resource depletion. LCA stages: (1) Raw material extraction, (2) Manufacturing/Processing, (3) Distribution & Packaging, (4) Use phase, (5) End-of-life recycling/disposal.

90% Probability 8 Marks Module 3: Engineering Fluid Mechanics

Q2. State Bernoulli’s equation for fluid flow. Water flows through an inclined pipe of diameter tapering from 20 cm at lower end (height 2m) to 10 cm at upper end (height 6m). If pressure at lower end is 300 kPa and flow rate is 50 L/s, determine the pressure at the upper end.

Key Points: Continuity equation: Q = A1*v1 = A2*v2 => v1 = 0.05 / (pi*0.1^2) = 1.59 m/s, v2 = 0.05 / (pi*0.05^2) = 6.37 m/s. Bernoulli: P1/(rho*g) + v1^2/(2g) + z1 = P2/(rho*g) + v2^2/(2g) + z2. Solve for P2 = 242.8 kPa.

🎓 Open Source Courses & Video Playlists (3)

MIT OpenCourseWare

MIT OCW: Sustainable Energy (Prof. Michael Golay)

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Stanford Online

Stanford Online: Energy and the Environment

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IIT Madras / NPTEL

NPTEL: Sustainable Engineering Concepts

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📄 Previous Year Question Papers (1)

MID1 • 2026 ⏱️ 75 Mins 🎯 40 Marks

Mid Semester Exam (CIA-1) March 2026 (Max Marks: 40, Duration: 75m)

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