Safety
Safety Data Sheet (SDS) information on the proper handling, storage and disposal of hazardous materials can be obtained from
a. The manufacturer
b. Occupational Safety and Health Administration
c. Environmental Protection Agency
d. Underwriter’s Laboratory
a. the manufacturer
An engine that is operated without oil will
a. Blow up
b. Overspeed
c. Seize up
d. Torque out
c. Seize up
A carburetor that has an excessive amount of fuel is referred to as being too
a. Rich
b. Lean
c. Hot
d. cold
a. Rich
An engine vibrating excessively during high speed operation could be due to
a. A bent blade
b. Carbon plugged exhaust ports
c. Excessively low rpm
d. A damaged head gasket
a. A bent blade
To check cylinder pressure, a ______ should be used.
a. Multimeter
b. Tang bender
c. Tachometer
d. Compression gauge
d. Compression gauge
The decibel is a unit of measurement for
a. Pressure
b. Sound
c. Distance
d. density
Sound
After sharpening lawn mower blades, the technician should reinstall the blades with the lift side of the blade towards the
a. Discharge chute
b. Ground
c. Drive wheels
d. Spindle or shaft
d. Spindle or shaft
When servicing air filters, how should a paper cartridge be cleaned?
a. Blowing compressed air through it
b. Dipping in solvent and then saturating with clean oil
c. Gently tapping against a flat surface
d. Washing with detergent and warm water
c. Gently tapping against a flat surface
An engine had excessive fuel consumption. That cause could be the
a. Air filter
b. Breather filter
c. Filler filter
d. Oil filter
a. Air filter
Which component of a piston assembly seals the combustion chamber?
a. Piston
b. Compression ring
c. Oil ring
d. Wrist pin
b. Compression ring
Forty foot-pounds equals _____ inch-pounds.
a. 240
b. 480
c. 720
d. 800
b. 480
When performing routine care and maintenance on an engine, the four main points to check are the oil supply, cooling system, air cleaner, and
a. Spark
b. Carburetor
c. Choke
d. Fuel supply
a. Spark
When dirty, an oil foam air cleaner should be
a. Cleaned in soapy water
b. Cleaned in water only
c. Cleaned in alcohol
d. Replaced with a new air cleaner
a. Cleaned in soapy water
What does blue/white exhaust smoke coming from a two-cycle engine indicate?
a. Rich oil-to-fuel ratio
b. A lack of cooling air
c. Weak oil-to-fuel ratio
d. Burning coolant
a. Rich oil-to-fuel ratio
The distance a piston travels from its highest position to its lowest position is known as its
a. Stroke
b. Cycle
c. Bore
d. displacement
a. Stroke
Prolonged exposure to which of the following odorless and tasteless combustion gasses may lead to headaches, blurred vision, dizziness, and possibly death?
a. CO
b. SO2
c. CO2
d. H2SO4
a. CO
Excessive carbon deposits in the cylinder head may lead to
a. Lower compression ratio
b. Engine overheating
c. Excessive manifold vacuum
d. Excessive oil consumption
b. Engine Overheating
The ________ is a part of the carburetor.
a. Spark plug
b. Alternator
c. Venturi
d. Oil filter
c. Venturi
Lean air-fuel mixture, use of improper fuels, and debris buildup on cooling fins on an air cooled engine may initially result in
a. Hunting and surging
b. Static fuel leakage
c. Engine overheating
d. Black exhaust smoke
c. Engine overheating
A piston pin is also known as a _____ pin.
a. Connecting
b. Dowel
c. Drive
d. Wrist
d. Wrist
The part on a garden tractor that will not allow the engine to crank for safety reasons is the ________ switch.
a. fuel
b. Balance
c. Interlock
d. governor
c. Interlock
Using “tap water” instead of distilled water in an engine’s cooling system may result in
a. Reducing the coolant boiling point
b. Mineral deposits and corrosion
c. Cleaning the internal water jacket
d. A more effective heat transfer
b. Mineral deposits and corrosion
A float-style carburetor is equipped with a bowl vent which
a. Provides constant pressure on the fuel in the fuel bowl
b. Allows small amounts of air into the gas tank line
c. Provides and air intake opening to the fuel tank
d. Keeps fuel flowing in the right direction
a. Provides constant pressure on the fuel in the fuel bowl
Overheating on an air-cooled engine would most likely be caused by
a. Improper engine enclosure
b. Rich air-fuel mixture
c. Faulty anti-fire solenoids
d. Faulty ignition ground
a. Improper engine enclosure
Aluminum block engines use valve seat inserts which are made of dissimilar metals. These are held tightly in the blocks by
a. Welding
b. Thermal expansion
c. Thermal retraction
d. Threading
b. Thermal expansion