Millwright - 2nd Year - Lubrication: Part B
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
To distribute oil to the moving What is the purpose of a lubrication
parts system?
of a machine to reduce friction
Because the rolling elements will Why is it important that the oil level isnt too
churn the oil and generate high in
excessive an oil bath lubrication system?
heat
1. Bottle lubrication What are the different types of lubrication
2. Wick feed lubrication systems?
3. Drip feed lubrication
4. Ring or chain oiler
An oiler mounted on top of the How does a bottle oiler function?
shaft
which allows the slight vibrations
of
the of the shaft cause the oil to run
down the plunger to lubricate the
shaft
Low surface speeds of 250 ft/min What application is a bottle oiler used in?
or
less
,1. Oil level always visible What are the advantages of a bottle oiler?
2. Inexpensive and simple to
construct
3. Oil flow automatically increases
when the rising bearing
temperature
reduces the oils viscosity
1. Oil is wasted instead of What are the disadvantages of a bottle
circulated oiler?
2. Not suitable for speeds above
1000 RPM
3. Not suitable on large shafts with
high surface speed
Capillary action What action transfers oil from the bottle to
the
bearing on a wick oil feeder?
1. Bearings with a 2" or smaller What are the applications of a wick feed
shaft oiler?
that require small amounts of oil
2. Anti-friction of friction bearings
, 1. Inexpensive and simple to What are the advantages of a wick feed
construct oiler?
2. Visible oil level
3. Wick acts as a filter that dust
particles adhere to
4. The oil transfer is controlled by
thickness of the wick
5. The oil flows through the wick,
so
the wick feeder can be above or
below the bearing
1. Wick must be periodically What are the disadvantages of a wick feed
cleaned oiler?
or replaced
2. Wick oxidizes at high
temperatures
3. Paraffinic oils cause the oiler to
stock with deposits
4. Wick fibres will contaminate the
bearing
5. Oil is wasted
By gravity How does a drip feed oil system deliver
oil?
By adjusting the bottle higher or How is the level of the oil set on a drip feed
lower in the cup oil
system located below the surface of the
oil?
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
To distribute oil to the moving What is the purpose of a lubrication
parts system?
of a machine to reduce friction
Because the rolling elements will Why is it important that the oil level isnt too
churn the oil and generate high in
excessive an oil bath lubrication system?
heat
1. Bottle lubrication What are the different types of lubrication
2. Wick feed lubrication systems?
3. Drip feed lubrication
4. Ring or chain oiler
An oiler mounted on top of the How does a bottle oiler function?
shaft
which allows the slight vibrations
of
the of the shaft cause the oil to run
down the plunger to lubricate the
shaft
Low surface speeds of 250 ft/min What application is a bottle oiler used in?
or
less
,1. Oil level always visible What are the advantages of a bottle oiler?
2. Inexpensive and simple to
construct
3. Oil flow automatically increases
when the rising bearing
temperature
reduces the oils viscosity
1. Oil is wasted instead of What are the disadvantages of a bottle
circulated oiler?
2. Not suitable for speeds above
1000 RPM
3. Not suitable on large shafts with
high surface speed
Capillary action What action transfers oil from the bottle to
the
bearing on a wick oil feeder?
1. Bearings with a 2" or smaller What are the applications of a wick feed
shaft oiler?
that require small amounts of oil
2. Anti-friction of friction bearings
, 1. Inexpensive and simple to What are the advantages of a wick feed
construct oiler?
2. Visible oil level
3. Wick acts as a filter that dust
particles adhere to
4. The oil transfer is controlled by
thickness of the wick
5. The oil flows through the wick,
so
the wick feeder can be above or
below the bearing
1. Wick must be periodically What are the disadvantages of a wick feed
cleaned oiler?
or replaced
2. Wick oxidizes at high
temperatures
3. Paraffinic oils cause the oiler to
stock with deposits
4. Wick fibres will contaminate the
bearing
5. Oil is wasted
By gravity How does a drip feed oil system deliver
oil?
By adjusting the bottle higher or How is the level of the oil set on a drip feed
lower in the cup oil
system located below the surface of the
oil?
