Tribology Quizzes
If friction is due to shear resistance within a lubricating fluid , this is: - Answer-Viscous Friction
Which friction is greater? Contact or Viscous - Answer-Contact
Rough surfaces comprise many small features called: - Answer-Asperities
f the lambda ratio is less than one, in which lubrication regime is the component likely operating -
Answer-boundary
If the fluid film thickness is much smaller than the average roughness of the contacting surface, in which
lubrication regime is the component likely operating? - Answer-boundary
In which lubrication regime is wear expected to be least significant? - Answer-full film
Which of the three common engineering material types is usually hardest? Ceramic, Polymer, metal -
Answer-Ceramic
Low wear is associated with materials having what material property ? - Answer-High Hardness
Low friction is associated with materials having what material property? - Answer-low shear strength
What is Brinell test used to measure? - Answer-Hardness
, If friction is due to shear resistance within a lubricating fluid, this is: - Answer-Viscous frictions
If the fluid film thickness is much larger than the average roughness of the contacting surface, in which
lubrication regime is the component likely operating? - Answer-full film
Carbiding is an example of a _____ surface treatment. - Answer-Chemical
Steel can be case-hardened by heating because the ___ changes with temperature. - Answer-
Microstructure
Graphite is an example of a ___ solid lubricant. - Answer-lamellar
Which of the following is NOT a reason to use a solid lubricant?
Very hot
Vacuum
Rough Surfaces
contamination not acceptable
maintience not possible - Answer-Rough surfaces
A transfer film is something ___ about how solid lubricant coatings function. - Answer-good
average and root-mean-square roughness are measures of the __ _ of the probability distribution of
surface heights? - Answer-Width
It is necessary to subtract a reference line from measured surface height data because
measured heights are: - Answer-relative to an arbitrary reference height
If friction is due to shear resistance within a lubricating fluid , this is: - Answer-Viscous Friction
Which friction is greater? Contact or Viscous - Answer-Contact
Rough surfaces comprise many small features called: - Answer-Asperities
f the lambda ratio is less than one, in which lubrication regime is the component likely operating -
Answer-boundary
If the fluid film thickness is much smaller than the average roughness of the contacting surface, in which
lubrication regime is the component likely operating? - Answer-boundary
In which lubrication regime is wear expected to be least significant? - Answer-full film
Which of the three common engineering material types is usually hardest? Ceramic, Polymer, metal -
Answer-Ceramic
Low wear is associated with materials having what material property ? - Answer-High Hardness
Low friction is associated with materials having what material property? - Answer-low shear strength
What is Brinell test used to measure? - Answer-Hardness
, If friction is due to shear resistance within a lubricating fluid, this is: - Answer-Viscous frictions
If the fluid film thickness is much larger than the average roughness of the contacting surface, in which
lubrication regime is the component likely operating? - Answer-full film
Carbiding is an example of a _____ surface treatment. - Answer-Chemical
Steel can be case-hardened by heating because the ___ changes with temperature. - Answer-
Microstructure
Graphite is an example of a ___ solid lubricant. - Answer-lamellar
Which of the following is NOT a reason to use a solid lubricant?
Very hot
Vacuum
Rough Surfaces
contamination not acceptable
maintience not possible - Answer-Rough surfaces
A transfer film is something ___ about how solid lubricant coatings function. - Answer-good
average and root-mean-square roughness are measures of the __ _ of the probability distribution of
surface heights? - Answer-Width
It is necessary to subtract a reference line from measured surface height data because
measured heights are: - Answer-relative to an arbitrary reference height
