1. Start….

2. “Small Gas Engine Measurement Tools”
Mr. Smith
Transportation

3. “Lesson Overview” Summary Straight Measurement Tools Feeler Gauges
Calipers
Micrometers
Telescoping Gauge
more...

4. “Overview Continued” Volume Measurement Tools Weight Measurement Tools
Dial Indicator
Torque Wrenches
Plastigauge
Multimeter
Horsepower Measurement Tools
Spark Plug Gapping Gauge

5. “Summary”
Besides needing tools to increase the gripping, cutting, turning power of the human hand, we also require them to enhance our judgement of the eye and brain. We must be able to make accurate comparisons between different sizes of things and spaces. We also must be able to say accurately just how large an object or space is or how much something weighs. This is especially important when working with engines because a few thousandths of an inch difference between two measurements can have a serious effect on engine performance.

6. Straight Measurement tools
A. Types
- Common tape measure, straight rulers
B. Uses
- Flat surfaces or along straight lines
C. Advantages
- Accurate
- Cheap
more...

7. Straight Measurement Tools
D. Limitations
- Only for straight or flat surfaces

8. Feeler Gauges A. Types - Blade Type, Wire Type, and Go, no - go
B. Uses
- For gaps
C. Advantages
- Accurate, cheap
D. Limitations
- Used only for gaps

9. Calipers A. Uses - Transfers cylindrical or flat measurement to ruler
1. Transfer Type
A. Uses
- Transfers cylindrical or flat measurement to ruler
B. Advantages
- Handy for quick comparing, cheap
C. Limitations
- no graduation, not a measuring device

10. Calipers 2. Vernier Calipers A. Uses B. Advantages C. Limitations
- For precision measurement inside and outside cylindrical or flat objects
B. Advantages
- Measures to a thousandth of an inch
C. Limitations
- Expensive, more for machine shop use

11. Micrometers more... A. Types B. Uses C. Advantages - Inside, outside
- Precision measurement of cylindrical or flat objects
C. Advantages
- More accurate than calipers
more...

12. Micrometers
D. Limitations
- Expensive, fragile

13. Telescoping Gauge A. Uses B. Advantages C. Limitations
- Transfers cylindrical measurement to micrometer
B. Advantages
- Small, handy
C. Limitations
- No graduations, not a measuring device

14. Volume Measurement Tools
A. Types
- Graduated cylinders, flasks, cups
B. Uses
- For finding volume, e.g., the amount of liquid poured in container
C. Advantages
- Only way to measure irregular objects
D. Limitations
- Only small objects may be measured

15. Weight Measurement Tools
A. Types
- Scales, balances
B. Uses
- Necessary to measure weight
C. Advantages
- Portable or fixed
D. Limitations
- Some are expensive

16. Dial Indicator more... A. Types B. Uses - Regular, digital
- Measures the back and forth movement of parts
more...

17. Dial Indicators C. Advantages D. Limitations
- Measures to the thousandth of an inch
D. Limitations
- Expensive, fragile

18. Torque Wrenches A. Types B. Uses C. Advantages D. Limitations
- Foot lbs. or inch lbs.
B. Uses
- Measure force applied to nuts and bolts
C. Advantages
- Accurate, prevents damage
D. Limitations
- Expensive, fragile

19. Plastigauge A. Uses B. Advantages C. Limitations
- Measures clearance between bearing and journal
B. Advantages
- Available in different sizes, accurate, cheap
C. Limitations
- Only measures clearances up to nine thousandths of an inch

20. Multimeter A. Types B. Uses C. Advantages - Digital, analog
- Contains, voltmeter, ammeter, and ohmmeter
C. Advantages
- Compact, accurate A u V

21. Horsepower Measurement Tools
A. Types
- Prony brake, dynamometer
B. Uses
- RPM and load measuring device
C. Advantages
- Accurate
D. Limitations
- Expensive, need formula to calculate horsepower

22. Spark Plug Gapping Gauge
A. Types
- Wire, solid metal
B. Uses
- Measure and adjust the ground electrode of plug
C. Advantages
- Cheap, handy, accurate 28 25 30 32 40 35

23. The End