190101g Measuring Tools

Define inertia.

The tendency of a body to remain in motion (likewise stationary objects tend to stay in position)

Force is best known as _________.

A push or pull

How is area of a circle calculated?

0.7854 x diameter squared

How do you convert a decimal to an exact fraction?

• Put the decimal over 1 (ex. 0.637546/1)

• move the decimal place until the top number is no longer decimal form. Add the same number of zeroes to the denominator value

• Divide until the fraction is as small as you can get it

How do you convert a decimal to a practical fraction?

Multiply the decimal by the given fraction denominator or pick a denominator value and try it. Round up/down to the nearest practical fraction

What are calipers used to measure?

Inside and outside diameters

What is another name for a stepped feeler gauge? Describe how they work.

Go-No-Go

• Each blade will measure a specific clearance

• One blade will read 2 numbers on its surface, telling you that the accurate clearance is the number that comes between the 2 surface numbers

What is the typical range of a telescoping gauge set?

5/16” to 6”

How should a dial indicator plunger be set to move?

At mid-range of travel

Where should precision measuring tools be stored?

In a special drawer or cabinet

What do torque wrenches measure?

Rotational force

What is another name for the metric system of measurement?

SI - System International Units

Define length

The distance or measurement between two points or an extent of time

Define volume

The measure of an amount of space in 3 dimensions

Define pressure

A force working on an area against an opposing force

What are the small markings on each side of an imperial steel measure called?

Graduations

What is a protractor/inclinometer most often used for?

Checking angles of drive shafts (in degrees)

How many threads per inch (tpi) does an imperial micrometer contain on its thimble?

40 tpi

What is the minimum amount that an inside micrometer can measure?

2 inches