Millwright - 3rd Year - Accessories, Fluids
and Seals Exam Questions and Answers with
Verified Solutions | Latest Updated 2026
1. How can hydraulic fluid that 1. can cause cancer
comes
in contact with your skin for
prolonged periods harm you?
2. How can a pinhole hydraulic 2. High-pressure fluid can pierce your skin
leak and
harm you? enter your bloodstream, which in turn can
cause
gangrene.
3. Why should a dynamic seal 3. for lubrication
have
some leakage?
4. What condition must the 4. It must be flat with no scratches.
surfaces
of a metal-to-metal seal be in
before
assembly?
5. What tightening pattern must 5. spiral from the centre
you
use to avoid distortion when
bolting
rectangular surfaces together?
, 6. How can you determine the 6. Consult the service manual.
correct torque value when you
assemble a hydraulic component?
7. What is the main purpose of a 7. support the O-ring against extrusion
backup ring for an O-ring?
8. What type of sealant should you 8. liquid sealant
use on tapered pipe threads in
hydraulics?
9. Which should have the tightest 9. b) static O-ring
fit?
a) dynamic O-ring
b) static O-ring
10. What type of piston rings 10. non-metallic
should
you use when no cylinder creep
can
be tolerated?
11. How can you keep the 11. Use a filter cart to install the oil.
contaminants in new oil out of a
hydraulic system?
12. How can you minimize 12. Use straight thread with ORB fittings.
contamination due to assembly of
pipe joints?
and Seals Exam Questions and Answers with
Verified Solutions | Latest Updated 2026
1. How can hydraulic fluid that 1. can cause cancer
comes
in contact with your skin for
prolonged periods harm you?
2. How can a pinhole hydraulic 2. High-pressure fluid can pierce your skin
leak and
harm you? enter your bloodstream, which in turn can
cause
gangrene.
3. Why should a dynamic seal 3. for lubrication
have
some leakage?
4. What condition must the 4. It must be flat with no scratches.
surfaces
of a metal-to-metal seal be in
before
assembly?
5. What tightening pattern must 5. spiral from the centre
you
use to avoid distortion when
bolting
rectangular surfaces together?
, 6. How can you determine the 6. Consult the service manual.
correct torque value when you
assemble a hydraulic component?
7. What is the main purpose of a 7. support the O-ring against extrusion
backup ring for an O-ring?
8. What type of sealant should you 8. liquid sealant
use on tapered pipe threads in
hydraulics?
9. Which should have the tightest 9. b) static O-ring
fit?
a) dynamic O-ring
b) static O-ring
10. What type of piston rings 10. non-metallic
should
you use when no cylinder creep
can
be tolerated?
11. How can you keep the 11. Use a filter cart to install the oil.
contaminants in new oil out of a
hydraulic system?
12. How can you minimize 12. Use straight thread with ORB fittings.
contamination due to assembly of
pipe joints?
