FFA Study Guide Small Engines
Questions and Answers Latest Version
Already Passed
What is the primary purpose of the flywheel on a small engine?
✔✔ To maintain engine momentum and smooth out the power stroke
Why is it important to gap a spark plug correctly?
✔✔ To ensure proper ignition and fuel combustion
What does the carburetor do in a small engine?
✔✔ It mixes air and fuel in the correct ratio for combustion
What component controls the opening and closing of the engine valves?
✔✔ The camshaft
Why should oil levels in a small engine be checked before each use?
✔✔ To prevent engine damage due to insufficient lubrication
1
,What part ignites the air-fuel mixture in a gasoline small engine?
✔✔ The spark plug
What is the function of the piston in a small engine?
✔✔ To compress the air-fuel mixture and transfer power to the crankshaft
What is the role of the air filter in a small engine?
✔✔ To prevent dirt and debris from entering the carburetor and engine
How is the engine cooled in most small air-cooled engines?
✔✔ By fins on the cylinder that allow heat to dissipate into the air
What tool is used to check the spark plug gap?
✔✔ A feeler gauge
Why must fuel be drained from the tank when storing a small engine for a long time?
✔✔ To prevent varnish buildup and carburetor clogging
2
,What is the purpose of engine oil?
✔✔ To reduce friction between moving parts and prevent wear
Why is it important to use the correct spark plug for an engine?
✔✔ Using the wrong one can cause poor performance or engine damage
What does a governor do in a small engine?
✔✔ It regulates the engine speed automatically under varying loads
How does a recoil starter work?
✔✔ It spins the crankshaft quickly to start the engine
What part connects the piston to the crankshaft?
✔✔ The connecting rod
Why is proper torque important when tightening engine bolts?
✔✔ To prevent parts from warping or coming loose during operation
3
, What happens if the air filter is clogged?
✔✔ The engine may run rich, lose power, or stall
Why is it important to clean cooling fins regularly?
✔✔ To prevent overheating by allowing proper airflow
What is valve clearance?
✔✔ The small gap between the valve stem and rocker arm when the valve is closed
What happens if valve clearance is too tight?
✔✔ Valves may not close completely, causing poor compression
What is the most common reason a small engine won't start?
✔✔ Lack of spark, fuel, or compression
How should you store a small engine during winter?
✔✔ Drain fuel, change oil, and store in a dry location
4
Questions and Answers Latest Version
Already Passed
What is the primary purpose of the flywheel on a small engine?
✔✔ To maintain engine momentum and smooth out the power stroke
Why is it important to gap a spark plug correctly?
✔✔ To ensure proper ignition and fuel combustion
What does the carburetor do in a small engine?
✔✔ It mixes air and fuel in the correct ratio for combustion
What component controls the opening and closing of the engine valves?
✔✔ The camshaft
Why should oil levels in a small engine be checked before each use?
✔✔ To prevent engine damage due to insufficient lubrication
1
,What part ignites the air-fuel mixture in a gasoline small engine?
✔✔ The spark plug
What is the function of the piston in a small engine?
✔✔ To compress the air-fuel mixture and transfer power to the crankshaft
What is the role of the air filter in a small engine?
✔✔ To prevent dirt and debris from entering the carburetor and engine
How is the engine cooled in most small air-cooled engines?
✔✔ By fins on the cylinder that allow heat to dissipate into the air
What tool is used to check the spark plug gap?
✔✔ A feeler gauge
Why must fuel be drained from the tank when storing a small engine for a long time?
✔✔ To prevent varnish buildup and carburetor clogging
2
,What is the purpose of engine oil?
✔✔ To reduce friction between moving parts and prevent wear
Why is it important to use the correct spark plug for an engine?
✔✔ Using the wrong one can cause poor performance or engine damage
What does a governor do in a small engine?
✔✔ It regulates the engine speed automatically under varying loads
How does a recoil starter work?
✔✔ It spins the crankshaft quickly to start the engine
What part connects the piston to the crankshaft?
✔✔ The connecting rod
Why is proper torque important when tightening engine bolts?
✔✔ To prevent parts from warping or coming loose during operation
3
, What happens if the air filter is clogged?
✔✔ The engine may run rich, lose power, or stall
Why is it important to clean cooling fins regularly?
✔✔ To prevent overheating by allowing proper airflow
What is valve clearance?
✔✔ The small gap between the valve stem and rocker arm when the valve is closed
What happens if valve clearance is too tight?
✔✔ Valves may not close completely, causing poor compression
What is the most common reason a small engine won't start?
✔✔ Lack of spark, fuel, or compression
How should you store a small engine during winter?
✔✔ Drain fuel, change oil, and store in a dry location
4
