PRECISION EXAMS Small Engines I EXAM INFORMATION Items 49 Points 62 Prerequisites NONE Grade Level 10-12 Course Length ONE SEMESTER DESCRIPTION This is a course that prepared individuals to apply technical knowledge and skill to maintain and repair small internal-combustion engines used on portable power equipment, such as lawn and garden equipment. Work ethics, productivity, and safety are an integral part of the classroom and laboratory activities of these classes. Career Cluster TRANSPORTATION, DISTRIBUTION, AND LOGISTICS Performance Standards INCLUDED Certificate Available YES EXAM BLUEPRINT STANDARD PERCENTAGE OF EXAM 1- General Shop Safety 17% 2- Hand Tools, Fasteners, and Shop Equipment 25% 3- Basic Small Engine Services 20% 4- Diagnosing Small Engines 13% 5- Disassembling/Reassembling Small Engines 10% 6- Mathematical Equations and Small Engines 15% 7- Employability and Work Habits (Optional) 8- Skills in the Workplace (Optional)
STANDARD 1 STUDENTS WILL BE ABLE TO UNDERSTAND GENERAL SHOP SAFETY Learn safe working habits and procedures. Pass a safety test with 100 percent. 1. Personal safety 2. Tool and equipment safety 3. Workplace safety Comply with safety rules for working with automotive chemicals. 1. Chemical manufacturers provide a material safety data sheet (MSDS) for each chemical they produce. 2. Store chemicals in properly labeled containers. Identify the harmful exhaust gasses encountered in the small engine field and the hazards they present. 1. Hydrocarbons (HC) and carbon monoxide (CO) Standard 1 Performance Evaluation included below (Optional) STANDARD 2 STUDENTS WILL BE ABLE TO UNDERSTAND BASIC HAND TOOLS, FASTENERS, AND SHOP EQUIPMENT Identify, size, and measure metric and standard fasteners. 1. Bolts, nuts, lock washers, keys, cotter pins, and snap rings. 2. Right-hand and left-hand threads and course and fine threads Correctly identify and use basic hand tools. 1. Screwdrivers, wrench, sockets, drive handles, extensions, pliers, hammer, chisels, punches, files, hacksaw, pullers, vises, drill bits, grinding tools. 2. Describe the use of each of the above tools. Identify and demonstrate use of basic measuring tools (accurate to 1/32 or 1mm). 1. Micrometers, rulers, feeler gauges compression gauges, and digital multi meter (DMM). Use reference manuals or information systems to find service procedures and specifications. 1. Computer oriented 2. Printed manuals 3. Owner s manuals Standard 2 Performance Evaluation included below (Optional) STANDARD 3 STUDENTS WILL BE ABLE TO IDENTIFY AND PERFORM BASIC SERVICES ON A SMALL ENGINE Locate and identify basic engine components. 1. Identify engine components. Precision Exams 501.1819 www.precisionexams.com Page 2
1. Block, crankshaft, camshaft, piston, piston rings, cylinder head, connecting rod, valve train, timing components 2. Fuel systems: carburetor, fuel filter, lines, tank 3. Ignition systems: spark plug, magneto, coil 4. Cooling system: cooling fins, shroud, and flywheel 5. Lubrication system: dip stick, oil slinger or pump, oil plug, oil. 6. Exhaust system: muffler, exhaust gasket. Change engine oil and filter on a small engine. Use proper disposal methods for waste oil. 1. Check fuel filter. 2. Check air filter. 3. Change and gap spark plug. 4. Remove and sharpen lawn mower blade. 5. Check oil level. 6. Perform an oil change. Understand the four-stroke cycle. 1. Intake 2. Compression 3. Power 4. Exhaust Intake/compression 1. Power/exhaust 2. Explain the differences and similarities between 2-cycle and 4-cycle engines. 3. Intake and exhaust ports on 2-cycle engines versus valves on 4-cycle engines 4. Correctly mix 2-cycle oil and gasoline mixture. Standard 3 Performance Evaluation included below (Optional) STANDARD 4 STUDENTS WILL BE ABLE TO PERFORM A DIAGNOSIS ON A SMALL ENGINE Understand combustion, internal and external as it relates to the four elements of combustion. 1. Fuel 2. Air 3. Compression 4. Spark Troubleshoot fuel system problems. 1. Carburetor 2. Fuel tank/filter 3. Fuel lines/pumps 4. Air filter/box 5. Color of exhaust Precision Exams 501.1819 www.precisionexams.com Page 3
Objective 5 Troubleshoot ignition system problems. 1. Perform spark test. 2. Remove and replace spark plug. 3. Check and gap spark plug. 4. Check magneto, air gap, and kill-wire. 5. Timing Troubleshoot compression problems. 1. Perform a compression test. 2. Define a wet test 3. Perform a cylinder leak-down test Troubleshoot lubrication system. 1. Oil specifications 2. Burnt oil 3. Inspection for the crankcase 4. Color of exhaust Standard 4 Performance Evaluation included below (Optional) STANDARD 5 STUDENTS WILL BE ABLE TO DISASSEMBLE AND REASSEMBLE A SMALL GAS ENGINE Identify major small gas engine components and parts. 1. Cylinder block 2. Side cover 3. Cylinder 4. Crankshaft and crank gear 5. Connecting rod 6. Bearing 7. Piston 8. Piston-pin (wrist-pin) 9. Rings (compression ring/oil control ring) 10. Tappets/lifters 11. Valves (intake/exhaust) 12. Valve spring and valve retainer 13. Camshaft 14. Cylinder head 15. Head gasket 16. Reed valve (2-stroke) Disassemble a small gas engine. Inspect major small gas engine components and parts. 1. Cylinder head torque pattern. Precision Exams 501.1819 www.precisionexams.com Page 4
Objective 5 2. Inspect the cylinder. 3. Ring end gap. 4. Inspect the piston. 5. Connecting rod, bearing clearance (plastic gauge) 6. Check crankshaft endplay. 7. Check valve clearance. 8. Inspect valve and valve seat. Recondition, repair, or replace components and parts. Reassemble a small gas engine. Standard 5 Performance Evaluation included below (Optional) STANDARD 6 STUDENTS WILL BE ABLE TO SOLVE BASIC MATHEMATICAL EQUATIONS RELATED TO SMALL ENGINES Solve whole number problems with two and three digits. 1. Addition 2. Subtraction 3. Multiplication 4. Division Solve fraction problems. 1. Addition 2. Subtraction 3. Multiplication 4. Division Solve decimal problems with two and three digits. 1. Addition 2. Subtraction 3. Multiplication 4. Division Solve basic ratio to proportion problems. 1. Fuel/air mixture 2. Oil/gas mixture Standard 6 Performance Evaluation included below (Optional) STANDARD 7 (Optional) STUDENTS WILL BE ABLE TO UNDERSTAND THE IMPORTANCE OF EMPLOYABILITY AND WORK HABITS Integrity Punctuality Precision Exams 501.1819 www.precisionexams.com Page 5
Objective 5 Staying on task Productive team worker Leadership Standard 7 Performance Evaluation included below (Optional) STANDARD 8 (Optional) STUDENTS WILL GAIN AN UNDERSTANDING OF SMALL ENGINE REPAIR AS A PROFESSION AND WILL DEVELOP PROFESSIONAL SKILLS FOR THE WORKPLACE As a participating member of the SkillsUSA student organization, complete the SkillsUSA Level 1 Professional Development Program. 1. Complete a self-assessment inventory and identify individual learning styles. 2. Discover self-motivation techniques and establish short-term goals. 3. Determine individual time-management skills. 4. Define future occupations. 5. Define awareness of cultural diversity and equity issues. 6. Recognize the benefits of conducting a community service project. 7. Demonstrate effective communication skills with others. 8. Participate in a shadowing activity. 9. Identify components of an employment portfolio. 10. Explore what is ethical in the workplace or school. 11. Demonstrate proficiency in program competencies. 12. Master a working knowledge of SkillsUSA. 1. State the SkillsUSA motto. 2. State the SkillsUSA creed. 3. Learn the SkillsUSA colors. 4. Describe the official SkillsUSA dress. 5. Describe the procedure for becoming a SkillsUSA officer. Understand the use of the skills obtained in small engine repair and how they relate to career opportunities. Display a professional attitude toward the instructor and peers. *SkillsUSA PDP requirements recommended Precision Exams 501.1819 www.precisionexams.com Page 6
Small Engines I Performance Standards (Optional) Performance assessments may be completed and evaluated at any time during the course. The following performance skills are to be used in connection with the associated standards and exam. To pass the performance standard the student must attain a performance standard average of 8 or higher on the rating scale. Students may be encouraged to repeat the objectives until they average 8 or higher. Students Name Class STANDARD 1 Shop Safety Understand general shop safety STANDARD 2 Basic Hand Tools, Fasteners, and Shop Equipment Understand basic hand tools, fasteners, and shop equipment STANDARD 3 Small Engine Services Identify and perform basic services on a small engine STANDARD 4 Diagnosis of a Small Engine Perform a diagnosis on a small engine STANDARD 5 Disassemble and Reassemble a Small Gas Engine Disassemble and reassemble a small gas engine STANDARD 6 Basic Mathematical Equations Solve basic mathematical equations related to small engines STANDARD 7 Employability and Work Habits Understand the importance of employability and work habits PERFORMANCE STANDARD AVERAGE SCORE: Precision Exams 501.1819 www.precisionexams.com Page 7