Chapter 6 PowerPoint

Define these Technical Terms using the textbook:

1. dial indicator

2. feeler gauge

3. micrometer

4. pressure gauge

5. telescoping gauge

6. torque wrench

7. vacuum gauge

8. vernier caliper

Read the chapter summary below:

■ As a vehicle is driven, its moving parts slowly wear out. With enough part wear, mechanical failures and performance problems result.

■ Auto manufacturers give “specs,” or specifications, for maximum wear limits and dimensions of parts.

■ Our customary measuring system originated from sizes taken from parts of the human body.

■ Conversion between units in the metric (SI) measuring system is based on a power of ten.

■ A steel rule, also called scale, is frequently used to make low-precision linear measurements.

■ A vernier caliper is a sliding caliper with a dial gauge or digital readout attached.

■ A micrometer, nicknamed a “mike,” is commonly used when making very accurate measurements.

■ Never drop or over tighten a micrometer. It is very delicate and its accuracy can be thrown off easily.

■ A feeler gauge is used to measure small clearances or gaps between parts.

■ A Dial indicator will measure part movement in thousandths of an inch (hundredths of a millimeter).

■ A torque wrench measures the amount of turning force applied to a fastener.

■ A pressure gauge is frequently used in the auto shop to measure air or fluid pressure in various systems and components.

■ Automotive technicians use mathematics during servicing and repair of vehicles and when filling out work orders for billing customers.