What should be the unit of measurement for earthwork in excavation in any type of soil and honeycomb brick work?
- Am² and m²
- Bm³ and m
- Cm³ and m²Correct
- Dm and m²
Solution
Concept
Earthwork in excavation is measured by volume (m³). Honeycomb brickwork is measured by area (m²) with its thickness stated.
Step-by-step solution
1. Earthwork in excavation is a bulk quantity, so it is measured by volume in m³. 2. Honeycomb brickwork is a thin wall with openings. It is measured by area in m², and the thickness is specified. 3. So the units are m³ and m², which is option C.
Explanation
Excavation is always measured by volume, so its unit is cubic metre. Honeycomb brick work is thin, usually half-brick, so it is measured by face area in square metre. So the correct pair is m³ and m².
Why the other options are wrong
A: Earthwork is not measured by area. B: Honeycomb brickwork is not measured by running metre. D: Earthwork is not measured by length.
Shortcut
Bulk work is measured in m³. Thin work (honeycomb, half-brick wall, plaster) is measured in m².
Common mistake
Taking all brickwork in m³. Thin or honeycomb brickwork is measured in m².
Correct answer: C) m³ and m²