MACHINE SHOP CALCULATION - OD1640 - LESSON 2/TASK 3
LESSON 2
CONVERSION OF LINEAR
MEASUREMENTS FROM THE ENGLISH TO THE
METRIC SYSTEM AND FROM THE METRIC TO THE
ENGLISH SYSTEM; AND SOLVING PROBLEMS USING
RATIO, PROPORTION, AND TRIGONOMETRY
TASK 3.
Describe the processes for solving problems using trigonometry.
CONDITIONS
Within a self-study
environment
and
given
the
subcourse
text,
without
assistance.
STANDARDS
Within two hours
REFERENCES
No supplementary references are needed for this task.
1.
Introduction
In this task we will discuss the processes involved in solving machine shop
problems through the use of trigonometry.
2.
General
Task 1 and 2 of this lesson served respectively to describe the processes
for converting linear measurements from the English to the metric system and
from the metric to the English system, and for solving problems using ratio
and proportion. In view of the fact that some military equipment has been
developed with both metric and English measured components, Task 1 enables
the machinist to convert linear measurements from one system to another,
thereby ensuring the proper mating of machined parts that must operate in
mesh with each other. Task 2 enables the machinist to determine the size
that a spool, pulley or gear must be machined to, to permit its rotation at
a specified
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