Deck 22: Applied Metrics for Welders

Question 1

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

Answer 1

prefixes

Question 2

A metric dimension is given as a ____ fraction.

A) decimal
B) common
C) standard
D) simple

Answer 2

A

Question 3

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

A) upper-case letters
B) lower-case letters
C) standard symbols
D) small icons

Answer 3

B

Question 4

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

Question 5

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

A) 0.50
B) 0.75
C) 1.00
D) 1.25

Question 6

When converting inches to millimeters, you multiply by ____.

A) 0.305
B) 1.639
C) 25.4
D) 645.2

Question 7

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

Question 8

One degree approximates ____ radian.

A) 0.017
B) 0.020
C) SI
D) MM

Question 9

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

Question 10

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

A) Referenced
B) Factored
C) Combined
D) Derived

Question 11

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

Question 12

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

Question 13

Metric prefixes are generally mixed in one expression.

Question 14

The metric system is often identified by the initials ____.

A) SM
B) MI
C) SI
D) MM

Question 15

Metric prefixes represent powers of ____.

A) one
B) two
C) ten
D) twelve

Question 16

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

Question 17

When converting square inches to square millimeters multiply by ____.

A) 0.305
B) 1.639
C) 25.4
D) 645.2

Question 18

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

Question 19

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

A) addition
B) subtraction
C) multiplication
D) division

Question 20

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.