Exam 22: Applied Metrics for Welders

The primary system of measurement used by most of the world is the ____________________ system.

The metric system is often identified by the initials ____.

The NPT thread is a tapered thread with a taper of ____ inch(es) per foot.

One degree approximates ____ radian.

In metric drawings for weldments, a millimeter dimension with a whole number and a decimal fraction is shown with a zero following the decimal fraction.

Metric threads each have an included angle of ____________________° for each thread form.

Many components shown on metric prints can be fabricated from materials that are available in standard metric sizes.

____ units are SI quantities obtained by combining base and supplementary units.

When converting inches to millimeters, you multiply by ____.

A metric dimension is given as a ____ fraction.

The word "metric" is derived from the Greek word "metron," meaning measure.

When converting an inch value to a millimeter value, a(n) ____ process is used.

Metric prefixes are generally mixed in one expression.

When converting square inches to square millimeters multiply by ____.

Metric prefixes represent powers of ____.

When converting an inch dimension not having a tolerance to a millimeter equivalent, the conversion is made to the same preciseness or better.

Symbols for metric units are shown in ____, except for units derived from the names of people.

The ____________________ represents the distance from the crest of one thread to the crest of the next thread.

In order to specify different values of metric base units of measure, a set of ____________________ is used.

The most common metric value found on a print is the ____________________.