Measurements and Layout

Question 1

Name two systems of measurement in North America?

Answer 1

Imperial and Metric

Question 2

What is the common unit of length in the SI system?

Answer 2

Meter

Question 3

Name two types of outside calipers?

Answer 3

Spring joint
Firm joint

Question 4

Fractional steel rules used in machine shops?

Answer 4

Spring-Tempered
Flexible
Narrow
Hook

Question 5

How many threads per inch are on a standard micrometers?

Answer 5

40

Question 6

What is the value of standard micrometer?
Lines on the sleeve?
Numbered line on sleeve?
Lines on thimble?

Answer 6

.025
.100
.001

Question 7

Studying the Metric what is the value of one division on:
Sleeve above index line?
Sleeve below index line?
The thimble?

Answer 7

Multiply by .1mm
Multiply by .5mm
multiply by .01mm

Question 8

Describe the principles of the
25 - division vernier
50 - division vernier

Answer 8

Bar graduations equal .025
Bar graduations equal .050

Question 9

What two micrometers are read in the same manner?

Answer 9

Standard and Inside micrometers

Question 10

What two plates are used for precision lay out?

Answer 10

Cast Iron and Granite

Question 11

Two edges formed make a 90 degree angle what edge/line is this referenced when starting your work piece?

Answer 11

Datum Line/edge

Question 12

Two ways of dimensioning your work piece, what are the two and explain?

Answer 12

Incremental - Take first measure from datum edge and then the next measure from last point adding up as you go.
Absolute - All measurements from datum edge.

Question 13

Another form a measurement is transfer of measurements, name three of these tools used to transfer measurements?

Answer 13

Small Hole Gauge
Calipers
Telescope