Air-Cooled Engine Technology

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1 Air-Cooled Engine Technology

2 Air-Cooled Engine Technology Test #1 Review 80 Questions Covers Chapters 1, 2, 4, 5, 22 Careers & Professionalism Tools & Safety Engine Basic Theory &Operation 2 Stroke & 4 Stroke Cycle

3 Air-Cooled Engine Technology Test #1 Question Format True & False Matching of Definitions - Vocabulary Short Answer Measuring & Math Engine Parts Identification

4 Tools to Know & What Their Use Is Armature Air Gap Gauge Too Much Gap = No Spark Spark Tester Checks for 12, 000 Volts

5 Tools to Know & What Their Use Is Vibration Tachometer Cylinder Leakage Tester RPM & Blade Tip Speed Is Important for Operation Pinpoints Cylinder Leaks

6 Tools to Know & What Their Use Is Compression Testers Also Called Compression Gauges Measures Cylinder Cranking Pressure Compression Needed For Heat

7 Tools to Know & What Their Use Is Torque Wrenches Tiny Tach Proper Tightening of Fasteners Accurate RPM Readings

8 Tools to Know & What Their Use Is Telescoping Gauge Small Hole Gauge Digital Multimeter Inside Diameter Measurements V, O, A, Temp, RPM

9 Tools to Know & What Their Use Is Flat Feeler Gauges Clearance Measurements Thread Pitch Gauges ID Coarse or Fine Threads

10 Tools to Know & What Their Use Is Wire Feeler Gauges For Gapping Spark Plugs

11 Tools to Know & What Their Use Is Micrometer Extremely Accurate O.D. Dial Caliper Inside, Outside, Depth

12 From Chapter 1 Study Guide 2. No unnecessary risks 6. Never gas-up a hot or running engine! 11. Safety Glasses! 13. Carbon Monoxide Poisoning = Asphyxiation

13 From Chapter 2 Study Guide 16. Dial Calipers 19. Feeler Gauges 23. Dial Indicators

14 From Chapter 4 Study Guide 1. Energy Change from Chemical to Heat to Mechanical in an engine 2. Internal Combustion is burning inside

15 From Chapter 4 Study Guide 3. Carburetors & Injectors Atomize Fuel 4. Combustion Chamber is above the piston and under the cylinder head

16 From Chapter 4 Study Guide 18. Aluminum is a lightweight metal used to cast blocks and cylinder heads 22. Crankshaft-journals 26. Flywheel 27. Piston 28. Piston Rings

17

18 From Chapter 4 Study Guide 30. Wrist Pin vs. Crank Pin 31. Connecting Rod 32. Motions

19 From Chapter 4 Study Guide 32. Motions 33. Poppet Valves 36. Camshaft

20 From Chapter 4 Study Guide 37. Valve Tappets = Valve Lifters 38. Camshaft # of teeth vs. crankshaft 39. Camshaft speed relationship to crankshaft 40. Flywheels many jobs!!

21 From Chapter 4 Study Guide

22

23 From Chapter 5 Study Guide 1. Stroke is one piston movement 2. Stroke is a distance measurement Bore x Bore x Stroke x.785 = Displacement Displacement is Total Cylinder Volume

24 From Chapter 5 Study Guide 3. Name the 4 strokes of the 4 stroke cycle!! 6, 8, 9. Know the crankshaft & camshaft degrees of rotation during operation Camshaft ¼ Turn 90º Crankshaft ½ Turn 180º

25 From Chapter 5 Study Guide 7. Know the 4 stoke cycle inside & out!!

26 Air-Cooled Engine Technology Overhead Valve or I - Head Engine Shown

27 Air-Cooled Engine Technology L - Head or Side Valve Engine Shown

28 From Chapter 5 Study Guide 11. Reason for Compression 13. Compression Ratio

29 From Chapter 5 Study Guide 14. Scavenging 18. Valve Timing & Valve Overlap

30 From Chapter 5 Study Guide 25. Back Pressure from Sound Waves

31 From Chapter 5 Study Guide 26. Reed Valve vs. Piston Port valving 28 & 29. Two-cycle vs. Four-cycle

32 From Chapter 22 Study Guide 3. Manuals are hard copy or electronic 13. What is the EETC 14. Competent people doing Quality work

33 From Chapter 12 Study Guide 1. Why encourage Preventive Maintenance 16. Troubleshooting complaint, cause, correction

34 Air Be Able to Explain This Concept: Related to No-Start Related to Hard-Starting Related to Rough Running Fuel Fire Triangle Heat 1) Compression 2) Spark

35 Cylinder: Precisely Machined Hole for Piston Crankshaft: Main Shaft Changes Reciprocating Motion to Rotary Motion Piston: Slides Up & Down in the Cylinder

36 Camshaft: Operates the Poppet Valves Poppet Valves: Open & Close the Intake & Exhaust Ports Lifters or Tappets or Cam Followers: Between Valve Stems & Cam

37 Bore: Cylinder Diameter Stroke: Length of Piston Travel Distance from TDC to BDC One Piston Movement Up or Down Displacement: Total Cylinder Volume

38 TDC: Top Dead Center BDC: Bottom Dead Center Combustion Chamber: Space Where Fuel & Air Burns Located Above the Piston & Below the Cylinder Head

39 Atomization: Breaking Fuel into Small Particles & Mixing it with Air Vaporization: Fuel & Air in a Cloud Form Poppet Valve Parts

40 Engine Manufacturers (OEM s)

41 Implement & Power Equipment Manufacturers (OEM s)

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