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WorksheetsSmall engine quiz for midterm
Total questions: 50
Worksheet time: 25mins
What is this part
Carburetor
Ignition coil
Fuel pump
Oil pump
To verify that the ______ is working, the air cleaner assembly must be removed and the throat of the carburetor checked.
air pressure regulated
primer bulb
cooling system
anti-afterfire solenoid
The direction of heat transfer is always from a _____ temperature to a ______ temperature.
lower, higher
lower, lower
higher, lower
higher, higher
What is torque?
a rotating force
Pressure per square in
rotations per minute
a pulling force
The connecting rod connects what two engine parts together?
Piston and Camshaft
Piston and Crankcase
Piston and Flywheel
Piston and Crankshaft
Which of the following is a function of a small engine?
To change heat energy into mechanical energy
To change kinetic energy into potential energy
To change rotary motion into vertical motion
To change reciprocal motion into circular motion
What are the purpose of the cam lobes?
to prevent oil in the cylinder
to move the valves open and closed
decroative
to seal the air-fuel mixture during compression
What theory does the ignition armature rely on to work?
Induction Theory
Bernoulli's Principle
the Venturi Effect
Four Stroke Theory
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
What are these
Valves
Fuel regulator
Carburetor
Rockers
If I was in a cold environment which , weight oil would I use in a small 4 stroke engine
0w20 Non synthetic
5w30 synthetic
30w60 Non synthetic
10w30 non synthetic
25W30 synthetic
select the aspects that an engine needs to run
air,fuel,spark,compression
Blocked exhaust , spark , fuel , low compression
No spark , banana stuffed into the intake , fuel , compression
Air, oil and fuel mixture , decompression , spark , timing belt
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 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
Why do valves rotate as they open and close?
to clean off the carbon build up
to provide extra torque to the engine
to assist in bringing in fresh air
the springs naturally do this
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
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
What does the governor control?
the rpms of an engine (tries to make them constant)
the choke (controls the air going into the carburetor)
The electrical current going to the spark plug
the amount of oil in the crankcase
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
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
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
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
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
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
