Precision Measurement 150401n Moodle

Question 1

The smallest discrimination on a Vernier bevel protractor is

Answer 1

5 minutes

Question 2

A Vernier micrometre has a resolution of

Answer 2

.0001 in

Question 3

If two light waves, with the same wavelength, travel together and the crest of one wave length is synchronize with the trough of a the other, the two waves cancel each other and disappear leaving blackness. What’s this cancellation called

Answer 3

Interference

Question 4

Optical flats are used to check the flatness, parallelism and size of flat surfaces. Optical Flats can be used to detect irregularities on

Answer 4

Micrometre anvils

Question 5

Fringe patterns can be interpreted to determine the

Answer 5

Shape and surface being measured

Question 6

What measuring device excessive gauge flatness to within a few millionths of an inch by comparing Fringe patterns created by four different wavelengths of light?

Answer 6

Interferometer

Question 7

A coordinate measuring system relies on a pattern of Shadows called

Answer 7

Moire Fringe

Question 8

The amount of shift that occurs in The Fringe patterns that appear when using a laser light measuring device is expressed as either a fraction or percentage of the

Answer 8

Pitch

Question 9

An interferometer with a cadmium Lamp Source can compare Fringe patterns created by different wavelengths of light. The four colours of light used to create fringe patterns are

Answer 9

Red, blue, green and yellow

Question 10

Essentially, a CMM measures a workpiece by using a

Answer 10

Probe to touch the workpiece

Question 11

How many contact points are needed for a CMM to measure a taper?

Answer 11

6