USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
LESSON 3
USE AND CARE OF MEASURING TOOLS
TASK 1.
Describe the procedures for the use and care of measuring tools.
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
Measuring tools are designed for measuring work accurately.
They include
level indicating devices (levels), noncalibrated measuring tools (calipers,
dividers, trammels) for transferring dimensions and/or layouts from one
medium to another, calibrated measuring tools (rules, precision tapes,
micrometers) designed to measure distances in accordance with one of several
standards of measurement, gages (go and no-go gages, thread gages) which are
machined to predetermined shapes and/or sized for measurement by comparison,
and combination tools such as a combination square which is designed to
perform two or more types of operations.
In this task, five types of measuring tools will be discussed. These types
are: scribers; rules or scales; calipers and dividers; micrometers; and
miscellaneous measuring gages.
2.
Standards of Measurement
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