Millwright - 2nd Year - Lubrication: Part A
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
What is Friction? The resistance to movement between two
surfaces
that touch each other.
What is the best wasy to mitigate Using lubricants
friction?
What are the negative effects of 1. Increased power consumption
friction? 2. It causes wear
3. It generates waste heat that can reduce
life of
components
What are the positive effects of 1. Provides traction between the rolling
friction? elements
and the raceways to ensure rolling instead
of
skidding
2. Promotes accurate tracking in bearing
raceways
3. Provides means of starting, stopping
and
accelerating most machines
4. Provides a means of polishing
, What are the 3 forms of friction? 1. Sliding
2. Rolling
3. Fluid
What is sliding friction? The resistance to movement that is
produced when
one survace slides across another
How is sliding resistance By interlocking, tearing and momentary
produced? molecular
welding of the peaks of asperities of the
two
surfaces
What type of friction offers the Sliding friction
most
resistance?
What is rolling friction? The resistance of movement of one
surface rolling
over another
Of what is rolling friction mainly a The resistance of the material to being
result? deformed
Does rolling friction offer more No, it offers more but less than sliding
resistance than fluid friction? friction
What is fluid friction? The resistance to flow within the fluid
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
What is Friction? The resistance to movement between two
surfaces
that touch each other.
What is the best wasy to mitigate Using lubricants
friction?
What are the negative effects of 1. Increased power consumption
friction? 2. It causes wear
3. It generates waste heat that can reduce
life of
components
What are the positive effects of 1. Provides traction between the rolling
friction? elements
and the raceways to ensure rolling instead
of
skidding
2. Promotes accurate tracking in bearing
raceways
3. Provides means of starting, stopping
and
accelerating most machines
4. Provides a means of polishing
, What are the 3 forms of friction? 1. Sliding
2. Rolling
3. Fluid
What is sliding friction? The resistance to movement that is
produced when
one survace slides across another
How is sliding resistance By interlocking, tearing and momentary
produced? molecular
welding of the peaks of asperities of the
two
surfaces
What type of friction offers the Sliding friction
most
resistance?
What is rolling friction? The resistance of movement of one
surface rolling
over another
Of what is rolling friction mainly a The resistance of the material to being
result? deformed
Does rolling friction offer more No, it offers more but less than sliding
resistance than fluid friction? friction
What is fluid friction? The resistance to flow within the fluid
