KEAM Architecture: PCM plus NATA Aptitude
What this domain tests
KEAM Architecture uses the PCM stream plus NATA aptitude. The CEE papers test Physics, Chemistry and Mathematics, while NATA adds spatial reasoning, drawing and architectural awareness. Kerala B.Arch admissions require the NATA qualification alongside the KEAM process, so a strong PCM score alone is not sufficient.
Core rules and concepts
- Scale: drawing length = real length ÷ scale factor; area scales by the square of the factor.
- Projection: orthographic views show true shape; isometric and perspective views show depth but distort measurements.
- Structures: resolve forces, identify tension/compression, and understand load paths in beams and trusses.
- Materials: relate chemistry and physics to cement, lime, glass, timber, thermal insulation and acoustics.
- Mathematics: geometry, trigonometry, mensuration, coordinate geometry and probability support design calculations.
Worked example
A room measures 4.8 m × 3.6 m. At 1:50, each metre becomes 100 cm ÷ 50 = 2 cm. Drawing dimensions: 4.8 × 2 = 9.6 cm and 3.6 × 2 = 7.2 cm. Drawing area = 9.6 × 7.2 = 69.12 cm². Actual area = 4.8 × 3.6 = 17.28 m². Check the area scale: 1:50 length means 1:2500 area, and 17.28 m² = 172,800 cm²; 172,800 ÷ 2500 = 69.12 cm². The reasoning confirms that area does not scale linearly.
Traps that cost marks
Treating 1:50 as 1:50 for area; mixing perspective with orthographic projection; forgetting NATA eligibility; and confusing carpet area with built-up or plot area. In numerical items, convert all lengths to the same unit before drawing.