Millwright - 2nd Year - Bearing Maintenance:
Part B Exam Questions and Answers with
Verified Solutions | Latest Updated 2026
What are the two most common Hydrodynamic and hydrstatic
methods of oil delivery?
What are the 2 most common 1. Oil is ciculated witha pump
methods for supplying oil to the 2. Oil is supplied by a slinger ring or by
bearings for hydrodynamic splash
lubrication?
What are some advantages of 1. Inexpensive and simple
hydrodynamic lubrication? 2. Proven technology that has worked for
the past
100 years
3. Has more reserve capacity
4. A low-pressure supply system is
adequate
, What are some disadvantages of 1. Film can be disrupted by surface
hydrodynamic lubrication? roughness or
dirt particles
2. Film cannot form on start-up resulting in
significant start-up friction
3. Not suitable for frequent starts and
stops
4. Shaft can become unstable due to oil
whirl
5. Requires extensive and elaborate
bearing
designs to overcome stability problems
What are some typical applications 1. Steam turbines
of hydrodynamic lubrication? 2. Large electric motors
3. Gear boxes (usually high speed heavy
load)
How does hydrostatic lubrication External force of pressure
force the fluid film into the loaded
area?
What are the components of a 1. Abearing with pockets at the oil entry
hydrostatic lubrication system? ports
2. Restrictors fitted to the ports to reduce
pressure
by one half
3. A supply pump and piping to the bearing
Part B Exam Questions and Answers with
Verified Solutions | Latest Updated 2026
What are the two most common Hydrodynamic and hydrstatic
methods of oil delivery?
What are the 2 most common 1. Oil is ciculated witha pump
methods for supplying oil to the 2. Oil is supplied by a slinger ring or by
bearings for hydrodynamic splash
lubrication?
What are some advantages of 1. Inexpensive and simple
hydrodynamic lubrication? 2. Proven technology that has worked for
the past
100 years
3. Has more reserve capacity
4. A low-pressure supply system is
adequate
, What are some disadvantages of 1. Film can be disrupted by surface
hydrodynamic lubrication? roughness or
dirt particles
2. Film cannot form on start-up resulting in
significant start-up friction
3. Not suitable for frequent starts and
stops
4. Shaft can become unstable due to oil
whirl
5. Requires extensive and elaborate
bearing
designs to overcome stability problems
What are some typical applications 1. Steam turbines
of hydrodynamic lubrication? 2. Large electric motors
3. Gear boxes (usually high speed heavy
load)
How does hydrostatic lubrication External force of pressure
force the fluid film into the loaded
area?
What are the components of a 1. Abearing with pockets at the oil entry
hydrostatic lubrication system? ports
2. Restrictors fitted to the ports to reduce
pressure
by one half
3. A supply pump and piping to the bearing
