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WorksheetsSmall Engines
Total questions: 63
Worksheet time: 32mins
What does a compression system do?
Create energy
Create cooling
Create electricity
Create power
What are the parts of a compression system?
Piston
Magneto
Cylinder
Oil pump
What does a cooling system do?
Adds heat
Removes heat
Supplies fuel
Lubricates
What are the parts of a cooling system?
Stationary Fins
Air Cooler
Radiator
All of the above
What is the purpose of lubrication systems?
Reduce friction
Ignite the air fuel mixture
Reduce heat
Deaden the sound of the internal combustion engine
Which of the following are some parts of the lubrication system?
Oil dipper
Sump
Valves
Governor
What is the purpose of the fuel/air delivery?
Supply lubricating oil
Deaden the sound of the internal combustion
Cool the engine
Store and supply fuel to the engine
What are the parts of the fuel/air delivery?
Carburetor
Muffler
Exhaust Pipe
Camshaft
What is the purpose of the exhaust system?
Deaden the sound made by the engine
Reduce friction
Supply fuel to the engine
Cool the engine
What is one part of an exhaust system?
Muffler
Choke valve
Sump
Spark plug
Where is the gas compressed?
Cylinder
Piston
Carburetor
Sump
What does the intake port bring in?
Exhaust
Heat
Oil
Air and fuel
What does the spark plug do?
Generates electricity
Seals the sides of the cylinder
Ignites the fuel-air mixture
Cools the cylinder
What do most small engines use to manage heat?
Shroud
Flywheel
Lubrication
Radiator
Where does the crankcase hold the oil?
right side of engine
top of engine
bottom of engine
left side of engine
What does the dipper do?
dries the mechanical components
oils the mechanical components
checks the oil levels
adds oil to the engine
Where does the muffler release fumes?
the environment
the engine
the exhaust port
they hold them for future disposal
Which systems in a small engine can use the crankshaft?
compression
exhaust
ignition
lubrication
What limits air intake?
mixer valve
fuel filter
choke
throttle
What system is the muffler a part of?
lubrication
cooling
exhaust
ignition
What system provides a mixture of fuel and air?
lubrication system
cooling system
exhaust system
fuel/air system
What system ignites fuel?
Ignition system
Compression system
Air system
Cooling system
What system removes burnt fuel?
cooling system
ignition
exhaust system
lubrication system
What system squeezes the fuel and air mixture into the top of the cylinder?
compression system
cooling system
ignition system
air system
How can you tell if the compression system is failing?
air leaks by the piston or out of the cylinder
misfiring
excessive compression
no compression
The crankshaft gives drive to what?
camshaft
spark plug
oil pump
carburetor
What are the two cycles for small engines?
Intake and compression
Intake and exhaust
Compression and exhaust
Compression and power
Which are signs that the cooling system is failing?
Increased temperature
Leakage
Misfiring
Low oil pressure
How can you tell if the ignition system is failing?
Leakage
Difficulty accelerating
Misfiring
Excessive compression
What is combustion?
Explosions created in a motor by gas, air, and spark
Explosions created in the combustion chamber
Something an engine needs to run
All of the above
Which of the following apply to the cooling system?
Helps keep motor from overheating
Moves heat energy away from engine
Part of the transmission
Helps fumes escape that are created in the motor
What is the difference between 2 cycle and 4 cycle?
Sound of engine is different
Mix oil and gas for a 2 cycle but usually not for a 4 cycle
Nothing
4 cycle uses 4 strokes of piston while 2 cycle only uses one
What are the parts of the cooling system?
Flywheel fins, stationary fins, & lubrication
Combustion chamber
Exhaust
Battery
What does the lubrication system do?
Helps cool engine
Keeps engine parts from excess wear
Reduces friction
All of the above
Which of the following are compression components?
Piston
Crankshaft
Piston rings
All of the above
What is a flywheel?
A piece of iron that has its own component atoms so ordered that has its properties of magnetism.
A cast iron, aluminum, or zinc disk that is mounted on one end of the crankshaft to provide inertia for an engine to prevent the loss of engine speed between combustion intervals.
A small electric generator containing a permanent magnet and used to provide high-voltage pulses, especially in the ignition systems of internal combustion engines.
An ignition system component that has two points that together function as a mechanical switch.
Which of the following is a air/fuel delivery system component:
Crankcase
Flywheel fin
Venturi
Exhaust pipe
Which of the two are exhaust system components?
Exhaust pipe
Throttle valve
Muffler
Radiator
What is a proper compression ratio?
2:1
6:1
8.5:1
5:1
What are the symptoms of compression failure?
Excessive compression
Inadequate compression
Engine fails to start
No spark in plug
What components hold or distribute oil to the engine?
Oil dipper
Lubrication system
Cylinder
Crankcase
What are the symptoms of ignition failure?
Engine fails to start
No spark in plug
No noise from starter motor
Stalling
How does an air cooling system work?
Engine is surrounded by coolant passages and keeps water circulating through the jackets, water will absorb the heat of the combustion
has cooling fins around the cylinder and radiates away the heat
helps push air out and direct cool air over the engine
pumps the air around the engine
What are properties of a 4 stroke engine?
lubricated by oil in the crankcase so oil isn’t mixed with the gasoline
use intake and exhaust ports instead of valves, thus saving the weight and cost of a valve train
smaller hand held machines
Uses 2 stroke cycle engine to complete one operating cycle
What are valves?
Holes that restrict the flow of fluids
Hand held machines
Engine component that opens and closes at precise times
They allow the flow of an air-fuel mixture into the cylinder and exhaust gases out of it
What are symptoms of excessive compression?
Can lead to potential failures of the piston connecting rod or occasionally crankshaft failures
leak occurs from the exhaust valve this causes an increase in dilution of the air to fuel mixture
More explosions
Air enters through the exhaust valve
What can be a cause of an engine blowing out white smoke?
Incomplete combustion
Oil leaking into the cylinder
Worn piston rings
Cracked engine block
What is the chamber called that the piston moves and the air-fuel mixture burns in?
The valves
The cylinder
The camshaft
The connecting rod
Connecting rods are the components that connect the ___ to the ___
Crankshaft
Carburetor
Camshaft
Piston
What does the primary circuit consist of?
Battery, ignition switch
Resistor
Ignition module
All of the above
What is the main job of the carburetor?
To transport the air-fuel mixture to the cylinder
Control the air to fuel ratio
To lubricate the pistons and other engine parts
To release the burned gases out of the engine
What can control the flow of fluids and changes pressure in the fuel reservoir?
Air cleaner
Throttle
Choke valve
Carburetor jet
What does the exhaust pipe do?
Allow gasses to exit
Hold in the gasses to make the engine faster
Traps the air fuel mixture inside the cylinder
Creates the air-fuel mixture
What are the jobs of the valves, intake and exhaust?
To let air into the cylinder
Take air out of the exhaust
Seal off the piston in the cylinder
Let the burned air-fuel mixture out of the cylinder
____ acts as a fan to cool the engine and distribute air around the engine block.
Stationary fins
Flywheel fins
Radiator
Water jacket
The magneto is a _______ that has been tuned to create a periodic high voltage pulse rather than a continuous current.
Small electrical generator
Large electrical generator
Exhaust pipe
Flywheel fins
What goes into the cylinder?
Air-fuel mixture
Piston
Piston rings
All the above
What is used to lubricate and distribute lubrication to small passages in the crankcase?
Oil
Oil dipper
Unclogger
Oil checker
What are the four strokes on the compression system engine?
intake, compression, power, and exhaust
intake, compression, exhaust, and piston stroke
intake, cylinder, exhaust, and piston stroke
intake, cylinder, exhaust, and power stroke.
What does the secondary circuit do?
Receives the spark to the spark plug.
Transfers the spark to the spark plug.
Transfers the spark to the spark chamber.
Receives the spark to the spark chamber.
What does connecting rod connect together.
A crankshaft to the piston
A crankshaft to the distributor
A crankshaft to the flywheel
A crankshaft to the radiator
_______ fins distribute air around the_____
Stationary
Flywheel
Motor
Engine
A radiator is used to?
Heat the engine
Cool the engine
Circulate coolant
Create spark
