Concept Of Ecosystem
The German biologist Ernst Haeckel in 1869 coined the word “Ecology” combining two Greek words – oikos, meaning “household” or “home”…
The German biologist Ernst Haeckel in 1869 coined the word “Ecology” combining two Greek words – oikos, meaning “household” or “home”…
The need of the hour is to make the public aware of the consequences of the environmental degradation, if not…
SCOPE OF ENVIRONMENT: The environment consists of four segments of the earth namely atmosphere, hydrosphere, lithosphere and biosphere: 1. Atmosphere:…
While cities only occupy two per cent of the Earth’s land surface, they draw on their hinterlands for goods and…
Wood rot is the common name used to indicate damage in wood due to fungal colonies that settle down on…
Types of defects in timber Types of Defects in timber are grouped into the following divisions. 1. DEFECTS DUE TO CONVERSION…
Timber is used for the following works: 1. For heavy construction works like columns, trusses, piles. 2. For light construction works like doors, windows,…
Various bases are considered for the classification of timbers. The following are the important basis: (i) Mode of growth (ii)…
Timber refers to wood used for construction works. In fact the word timber is derived from an old English word…
Step I: Draw the projections of the given solid in the uncut condition using thin lines. Step II: Draw the cutting plane…
The following steps can be used to draw sectional views: Step I: Draw the projections of the given solid in an…
For drawing projections of solids, one has to frequently draw projections of lines either parallel to the HP or the…