Millwright - 2nd Year - Bearing Seals and
Pillow Blocks Exam Questions and Answers
with Verified Solutions | Latest Updated 2026
What are the two basic ways to 1. External seal
seal 2. Integral seal
a bearing?
On an external seal, what is the The bearing housing
seal
installed on?
On an integral seal, what is the The bearing
seal
installed on?
What is the advantage of an Theres a wide selection of off-the-shelf
external styles and
seal? materials
What is the advantage of an It is cheap and more compact than an
integral external seal
seal?
What types of seals are there? 1. Rubbing seals (contact seals)
2. Non-rubbing seals (non-contact seals)
, What advantages do rubbing seals 1. Capable of retaining oil and not just
have over non-rubbing seals? grease
2. Provide a seal against moisture and fine
contaminants
What disadvantages do rubbing Tehy limit operating speed due to the heat
seals have compared to generated by friction.
non-rubbing
seals?
What are the types of external 1. Lip seal
rubbing seals? 2. V-ring seal
3. Felt seal
4. Mechanical seal
On a lip seal, what is the initial 1. A garter spring pressing the lip to the
light shaft
pressure before start up provided 2. Resilience of the lip seal material
by? combined with
a light fit to the shaft
On a lip seal, how may the 1. The whirling lubricant (after start-up)
pressure presses on
be increased after start up? the inside of the lip to provide adequate
contact
pressure
2. Gas or liqiuid pressure acting on the lip
to press
it towards the shaft
Pillow Blocks Exam Questions and Answers
with Verified Solutions | Latest Updated 2026
What are the two basic ways to 1. External seal
seal 2. Integral seal
a bearing?
On an external seal, what is the The bearing housing
seal
installed on?
On an integral seal, what is the The bearing
seal
installed on?
What is the advantage of an Theres a wide selection of off-the-shelf
external styles and
seal? materials
What is the advantage of an It is cheap and more compact than an
integral external seal
seal?
What types of seals are there? 1. Rubbing seals (contact seals)
2. Non-rubbing seals (non-contact seals)
, What advantages do rubbing seals 1. Capable of retaining oil and not just
have over non-rubbing seals? grease
2. Provide a seal against moisture and fine
contaminants
What disadvantages do rubbing Tehy limit operating speed due to the heat
seals have compared to generated by friction.
non-rubbing
seals?
What are the types of external 1. Lip seal
rubbing seals? 2. V-ring seal
3. Felt seal
4. Mechanical seal
On a lip seal, what is the initial 1. A garter spring pressing the lip to the
light shaft
pressure before start up provided 2. Resilience of the lip seal material
by? combined with
a light fit to the shaft
On a lip seal, how may the 1. The whirling lubricant (after start-up)
pressure presses on
be increased after start up? the inside of the lip to provide adequate
contact
pressure
2. Gas or liqiuid pressure acting on the lip
to press
it towards the shaft
