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WorksheetsSmall Engines Mid term P-2
Total questions: 50
Worksheet time: 25mins
Why do we have a choke on our engines before we start them?
Engines need a little more gas than air to get started, once starting you can increase air
Engines need a lot of air to get started
to ensure we flood the engine every time
To mix up the gas and oil
A narrower spot in the carburetor throat that increases the speed at which a the air/gas mixture travels uses __________?
the Venturi effect
Bernoulli's Principal
Induction Theory
Four-stroke engine theory
The governor connecting rod and spring connected to what?
the throttle plate
the choke plate
the ignition amature
the oil slinger
What is the adjustment made on the governor of small engines?
the static governor adjustment
the idle circuit screw
the ignition amateur air gap adjustment
the valve clearance adjustment
Does the spark plug fire with each rotation of the crankshaft?
yes
no
No answer text provided.
No answer text provided.
What is inside the ignition amature?
two copper coils
a computer chip
an electrical resistor
a magnet
What role does the flywheel play in the ignition system?
Provides the magnet to complete the induction theory cycle
provides the electrical current to complete the induction theory cycle
the electrical conductor to complete the induction theory cycle
it doesn't
What theory does the ignition armature rely on to work?
Induction Theory
Bernoulli's Principle
the Venturi Effect
Four Stroke Theory
What are the two systems for cooling an engine?
Liquid and air cooling systems
jet propulsion and injection systems
oil and vinegar cooling systems
chemical and physical systems
Why do you need to change your oil on a new engine after a few hours of work?
to clean out the disparities (small shards of steel) cause during the break in period
you don't have to
to prevent rust
to clean out harmful chemicals
The intake valve is typically larger.
True
False
What kind of fire is a Class C fire?
Electrical Fires
Combustible Metal fires
Regular fires
Combustible Liquids Fires
In one cycle of an engine how many times does the crankshaft rotate?
2
1
4
none
What are the three sections of the Model number?
Model, Type, Code
Serial number, sales number, date
Make, Model, Decal
the model number has just one part
Where is the most common spot to find the model number on small engines?
on the valve head cover
on the flywheel
on the crankcase base
on the fuel tank
What is torque?
a rotating force
Pressure per square in
rotations per minute
a pulling force
If your engine is running lean there will be white smoke.
True
False
What allows gas to come into the throat of the carburetor from the fuel bowl?
Bernoulli's Principle
the Venturi effect
Induction Theory
Four-Stroke Theory
What does the idle circuit do?
allows a little fuel/air mixture to bypass the throttle plate to maintain the engine
to mix the gas and air together
makes gas come up to the carburetor from the fuel bowl
Creates a vacuum in the combustion chamber
Why is gasoline not really the best fuel?
It has a low octane and high knocking index rating
it is cut with ethanol and lead
It has a high octane and low knocking index rating
it doesn't combust unless a lot of pressure is applied
What is this part
Carburetor
Ignition coil
Fuel pump
Oil pump
What are the two valves called?
Exhaust, Intake
Intake, Outtake
Ignition, Exhaust
Up, Down
Which engine type requires oil to be mixed into gas
Single cylinder
Two stroke engines
Four Stroke Engines
Auto engines
Using old gas can prevent your engine from starting. How new should gas be?
Less than 1 month old
Less than 6 month old
Less than 1 year old
Less than 6 years old
What will happen to your engine if there is too little oil?
The engine will seize
The engine may over heat
Causes wear on the internal parts of the engine
All of the above
There is no oil filter on a four stroke engine so tiny particles circulate with oil. How often should the oil be changed?
every year
every 5 hours of engine operation
every 25 hours of engine operation
every 40 hours of engine operation
What is the number one shop safety rule?
Report all accidents to the instructor
Always wear safety glasses
No horseplaying
Know where the fire extinguishers are located
What are the three main engines systems
Ignition, Compression, Fuel
Intake, Compression, Exhaust
Intake, Fuel, Compression
Spark, Fuel, Compression
What are the two valves called?
Exhaust, Intake
Intake, Outtake
Ignition, Exhaust
Up, Down
What is this part
Ignition coil
Points
Condenser
Timing coil
What is this
Rocker arms
Block
Valve
push Rod
What is this ?
exhaust gasket
Sump gasket
Carburetor gasket
Head gasket
What are the three sections of the Model number?
Model, Type, Code
Serial number, sales number, date
Make, Model, Decal
the model number has just one part
What is torque?
a rotating force
Pressure per square in
rotations per minute
a pulling force
If your engine is running rich there will be black smoke.
True
False
What danger does running an engine inside the shop present that requires students to open a window?
Carbon monoxide poisoning
bruising from a falling engine
a gas explosion
slipping on an oil spill
Why does the flywheel have to be so heavy?
It helps provide inertia to keep the engine going
engines are sold by the pound
it helps slow the engine to a stop
magnets are heavy and the flywheel has 1 or more
