NEW
Font size
WorksheetsSmall Engine Midterm Part 3
Total questions: 50
Worksheet time: 25mins
What is this part
Carburetor
Ignition coil
Fuel pump
Oil pump
What is this gasket for
Carburetor Gasket Kit
Oil pump Gasket
oil sump Gasket
Head gasket
What is this part
Governor and oil slinger
Oil slinger
governor
came shaft
What is this
Rocker arms
Block
Valve
push Rod
What is this part ?
Head
Piston
Came shaft
Connecting rod
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 would happen if all the piston rings were aligned?
oil would get into the combustion chamber and blue smoke would appear in the exhaust
the engine would die
nothing
the engine will run smoothly
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
______ is the international unit of frequency equal to one cycle per second.
Milliamp
Micron
Hertz
Henry
Voltage causes electrons to move in a circuit.
True
False
Cold cranking amps is the number of amps produced by a battery for ______ while maintaining 1.2 V per cell.
30 sec. at 0 degrees F
30 sec. at 32 degrees F
60 sec. at 0 degrees F
60 sec. at 32 degrees F
The direction of heat transfer is always from a _____ temperature to a ______ temperature.
lower, higher
lower, lower
higher, lower
higher, higher
The common concern with cast aluminum alloy is _______.
distortion
durability
cost
strength
Small engines convert______ from the combustion of a fuel into mechanical energy.
compressed air
heat energy
DEF
kinetic energy
Three methods of heat transfer are
conduction, potential, radiation
potential, kinetic, convection
conduction, kinetic, convection
conduction, convection, radiation
Horespower is a unit of power equal to______.
497W or 22000 lb-ft/min
725 W or 25000 lb-ft/min
746 W or 33000 lb-ft/min
750 W or 33190 lb-ft/min
What are the three main engines systems
Ignition, Compression, Fuel
Intake, Compression, Exhaust
Intake, Fuel, Compression
Spark, Fuel, Compression
What is torque?
a rotating force
Pressure per square in
rotations per minute
a pulling force
Which of the following parts below does NOT make up the piston?
Ring Grooves
Skirt
Cylinder
Connecting Rod
The connecting rod connects what two engine parts together?
Piston and Camshaft
Piston and Crankcase
Piston and Flywheel
Piston and Crankshaft
Where does compression take place in the small engine?
Piston
Cylinder
Crankcase
Flywheel
What are the egg-shaped pieces on the camshaft called?
Cam Lobs
Cam Valves
Cam retainers
Cam tappets
Which part caps the cylinder on the engine block?
Flywheel
Head
Crankcase
Valve
What events occur in the first stroke of a 2-cycle engine?
Intake and exhaust
compression and power
compression and exhaust
Intake and compression
During which stroke is a partial vacuum created that sucks the air-fuel mixture into the cylinder?
Intake
Compression
Power
Exhaust
During which stroke does the spark plug fire and cause combustion in the cylinder?
Intake
Compression
Power
Exhaust
Which engine is lubricated by having a gas/oil mixture?
1 cycle
2 cycle
3 cycle
4 cycle
During the compression stroke, the piston is moving?
right
down
left
up
What is the purpose of the compression ring?
provide a seal between the piston and crankshaft
provide a seal between the piston and the cylinder
provide a seal between the cylinder and the crankshaft
provides a seal between crankshaft and crankcase
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
When diagnosing why an engine will not remain started, which area below is not one of the three areas that should be checked first are?
Fuel
Compression
Spark
Cutting Blade
Which of the following is NOT a function or purpose of the crankshaft?
changes motion from reciprocating to rotary
provides air flow to the engine
uses counter weights for balance to maintain rotary motion
main shaft in engine
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 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
Fires involving plastic gas cans stored on a plastic truck liners begin because?
They can slide around
Metal or plastic retain static electricity that can spark
The plastic gas can are not safe
It is easy for them to tip over
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
