Which term is used to denote a grade or slope given to a surface, usually to provide for adequate drainage?

• A. Plan
• B. Plinth
• C. Pitch
• D. Plastic Deformation

Answer: (C)

Pitch is the grade or slope given to a surface to ensure water drains away rather than ponding. This concept is used for roofs and paving, where a deliberate incline directs water toward gutters or drains and helps prevent standing moisture. The amount of pitch can be described as a percentage or an angle, chosen to achieve effective drainage without creating excessive runoff. The other terms don’t describe slope: a plan is a top-down drawing, a plinth is the building’s base or foundation, and plastic deformation refers to permanent material deformation under load. So the term that denotes the drainage-related slope is pitch.