WorksheetsKEY - 2023 Small Engines District Test
Total questions: 25
Worksheet time: 13mins
An engine is a machine that converts a form of energy into mechanical force.
True
False
A pneumatic governor system uses a gear assembly that meshes with the camshaft or other components to regulate engine speed.
True
False
Carbon monoxide is slightly heavier than air.
True
False
Materials that do not conduct electricity are known as insulators and include plastic, rubber, paper and air.
True
False
Head gaskets are made from hard metals and graphite layered together.
True
False
With the maturing work force and a growing list of new products & technology in the small engine industry, the need for qualified service technicians is expected to grow. The need for trained service technicians is the number one issue facing the small engine industry. Competent service technicians are needed for meeting the needs of a service network.
the need for qualified service technicians is expected to grow.
the need for trained service technicians is the number one issue facing the small engine industry.
competent service technicians are needed for meeting the needs of a service network.
all of the above.
Horsepower is a unit of power equal to ___.
497 W or 22,000 lb-ft/min
725 W or 25,000 lb-ft/min
746 W or 33,000 lb-ft/min
750 W or 33,190 lb-ft/min
___ requires only enough force to accomplish the desired task.
Work
Torque
Power
Voltage
The Occupational Safety and Health Administration is a federal agency that requires all employers to provide a(n) environment for their employees.
Inviting
Contemporary
Peaceful
Approximately % of the energy released when fuel is oxidized in a typical small engine is converted into useful work.
50%
90%
is a toxic gas that is also odorless and tasteless.
Nitrogen
Helium
Methane
are specifically used to safely flush out particles or contaminants from eyes.
Eye drops
Sanitary sinks
Emergency showers
If the circuit is not complete, which of the following statements is correct?
The alternator will have no current output.
Voltage will be induced in the stator windings.
No charging system components will receive any current.
all of the above
The compression ratio of an engine is a comparison of the volume of the combustion chamber with the piston at to the volume of the combustion chamber with the piston at .
BDC TDC
TDC BDC
MDC BDC
BDC MDC
On four-stroke cycle engines, the camshaft rotates at the speed of the crankshaft.
1/4
twice
four times
Piston rings are commonly made from cast iron because cast iron.
is the strongest metal
is economically efficient to use
retains its shape under heat, load, and other dynamic forces
is readily available
Piston rings commonly used on small engines include the compression ring, wiper ring, and ring.
combustion
cylinder
seal
is sometimes referred to as knocking, spark knock, or pinging.
Cohesion
Maverick air
Detonation
The best way to check spark on a small engine is to:
remove spark plug lay spark plug against engine head
use a spark tester
hold coil wire while turning engine
all of the above
20. The of an engine is the linear distance that a piston travels in the cylinder bore from top dead center to bottom dead center.
TDC;BDC
Movement
Piston
The atmospheric pressure at sea level is psi.
0.147
1.47
147
The stroke shown at A is the ___ stroke.
Exhaust
Intake
Compression
Power
Compression: The stroke shown at B is the ___ stroke.
Compression
Intake
Exhaust
Power
The stroke shown at C is the ___ stroke.
Intake
Exhaust
Compression
Power
Power: The stroke shown at D is the ___ stroke.
Power
Weak
Initial
Final
