What are the three oil classifications? - ANSWER vegetable-based,
animal-based, mineral-based
Which lube is suitable for aviation? - ANSWER mineral-based lubricants
What are the three types of mineral-based lubricants? - ANSWER solid,
semisolid, fluid
Why are mineral-based lubricants used for aviation? - ANSWER more
chemically stable
Reduces friction, cools, seals, cushions, cleans, protects - ANSWER oil
functions
A measure of an oil's resistance to flow? - ANSWER viscosity rating
high temperature - ANSWER less viscous
low temperature - ANSWER more viscous
Most oils used in aircraft reciprocating engines have a relatively high
viscosity rating compared to turbine engine oils due to? - ANSWER
higher operating temperatures and larger clearances
Measures the time in seconds, for 60 cubic centimeters of oil to flow
through an accurately calibrated orifice, at a specific temperature. -
ANSWER saybolt universal viscometer
Rate of change in viscosity for a given change in temperature -
ANSWER viscosity index
low change in viscosity for a given temp change - ANSWER high vi
, high change in viscosity for a given temp change - ANSWER low vi
a comparison of the weight of an oil to the weight of an equal volume of
distilled water at a specified temperature - ANSWER specific gravity
determined by the amount of light that passes through an oil sample in a
glass container when placed in front of a light of known intensity. -
ANSWER oil color
temperature at which paraffin wax and other solids normally held in a
solution of oil begin to solidify and separate into tiny crystals - ANSWER
cloud point
the lowest temperature at which an oil can flow or be poured - ANSWER
pour point
The temperature at which an oil begins to emit ignitable vapors -
ANSWER flash point
the temperature at which an oil emits sufficient vapors to support a flame
- ANSWER fire point
The carbon content left after oil has been raised to a point at which it
evaporates - ANSWER carbon residue test
a measure of ash left after the carbon has been burned - ANSWER ash
test
Recommended for use during engine break in when new, or after
overhaul. Lubricating qualities are not as good as ashless-dispersant oil.
- ANSWER straight mineral oil
Designed to hold contaminants in suspension so that they don't form
sludge deposits. Used after the break-in period. - ANSWER ashless
dispersant oil
animal-based, mineral-based
Which lube is suitable for aviation? - ANSWER mineral-based lubricants
What are the three types of mineral-based lubricants? - ANSWER solid,
semisolid, fluid
Why are mineral-based lubricants used for aviation? - ANSWER more
chemically stable
Reduces friction, cools, seals, cushions, cleans, protects - ANSWER oil
functions
A measure of an oil's resistance to flow? - ANSWER viscosity rating
high temperature - ANSWER less viscous
low temperature - ANSWER more viscous
Most oils used in aircraft reciprocating engines have a relatively high
viscosity rating compared to turbine engine oils due to? - ANSWER
higher operating temperatures and larger clearances
Measures the time in seconds, for 60 cubic centimeters of oil to flow
through an accurately calibrated orifice, at a specific temperature. -
ANSWER saybolt universal viscometer
Rate of change in viscosity for a given change in temperature -
ANSWER viscosity index
low change in viscosity for a given temp change - ANSWER high vi
, high change in viscosity for a given temp change - ANSWER low vi
a comparison of the weight of an oil to the weight of an equal volume of
distilled water at a specified temperature - ANSWER specific gravity
determined by the amount of light that passes through an oil sample in a
glass container when placed in front of a light of known intensity. -
ANSWER oil color
temperature at which paraffin wax and other solids normally held in a
solution of oil begin to solidify and separate into tiny crystals - ANSWER
cloud point
the lowest temperature at which an oil can flow or be poured - ANSWER
pour point
The temperature at which an oil begins to emit ignitable vapors -
ANSWER flash point
the temperature at which an oil emits sufficient vapors to support a flame
- ANSWER fire point
The carbon content left after oil has been raised to a point at which it
evaporates - ANSWER carbon residue test
a measure of ash left after the carbon has been burned - ANSWER ash
test
Recommended for use during engine break in when new, or after
overhaul. Lubricating qualities are not as good as ashless-dispersant oil.
- ANSWER straight mineral oil
Designed to hold contaminants in suspension so that they don't form
sludge deposits. Used after the break-in period. - ANSWER ashless
dispersant oil
