i
PREFACE
The problem faced today in the learning and teaching of
engineering drawing for Environmental Health Sciences
students in universities, colleges, health institutions, training of
health center emanates primarily from the unavailability of text
books that focus on the needs and scope of Ethiopian
environmental students.
This lecture note has been prepared with the primary aim of
alleviating the problems encountered in the teaching of
Engineering Drawing course and in minimizing discrepancies
prevailing among the different teaching and training health
institutions. It can also be used as a reference material for
professional sanitarians.
The graphics of engineering design and construction may very
well be the most important course of all studies for an
engineering or technical career. The indisputable reason why
graphics or drawing is so extremely important is that it is the
language of the designer, technician, sanitarian, and
engineer, used to communicate designs and construction
details to others. The language of graphics is written in the
form of drawings that represent the shape, size, and
specifications of physical objects. The language is read by
interpreting drawings so that physical objects can be
constructed exactly as originally conceived by the designer.