Assess learners' ability to design an integrated closed-loop life‑support and energy system for a crewed lunar base using in‑situ resource utilization (ISRU). Test knowledge of atmospheric control (O2/CO2 management, air recycling), water recovery and waste processing, thermal control, power generation and storage from regolith/ice, mass and energy balance calculations, redundancy and failure modes, materials and resource trade-offs, and operational constraints of the lunar environment; require schematic sketches, quantitative sizing, and justification of design choices.