1. Structural Design & Forces | Understanding triangulation for rigidity, identifying forces acting on structures, benefits of disassemblable products for the environment. 2. Mechanisms & Motion Conversion | Reducing friction in pivots, classification of levers, types of motion conversion (oscillating, reciprocating, etc.). 3. Gears & Motion Transfer | Spur gear applications, effects of gear arrangements on motion and speed. 4. Electronic Components & Circuits | Recognizing symbols for capacitors, resistors, fuses, diodes, thermistors, and batteries, microswitch terminal functions. 5. Structural Safety & Load Analysis | Scaffolding stability, safety features, force distribution on beams, effects of long-term structural cracks. 6. Mechanisms & Mechanical Advantage | Functions of mechanical parts like cranked handles, calculation of stress in supports, tensioning methods for belt-driven systems. 7. Logic Gates & Electronic Systems | Designing NAND-only circuits, truth tables for heater control, signal behavior in 555 timer circuits. 8. Testing & Calculations in Circuits | Resistor calculations for timing circuits, capacitor effects, understanding deviations in expected circuit behavior. 9. Manufacturing & PCB Design | Advantages of specific PCB layouts, health and safety in photoetching, potential hazards in circuit construction. 10. Bearings & Rotational Systems | Uses of plain and tapered roller bearings, importance of bearing arrangement for load distribution and stability.