WorksheetsLO Week 17
Total questions: 20
Worksheet time: 11mins
Lubricating Oil provides: (choose all the correct answers)
Friction reduction
Heat dissipation
Corrosion protection
Cleaning of internal surfaces
Sealing (in certain applications)
If out-of-limit conditions persist on lubricating oil, they can cause:
Increased wear and friction
Bearing failures
Corrosive damage to engine components
Decreased fuel efficiency
Shortened machinery lifespan
Actions and Adjustments Based on Test Results
Actions to be done for high water content:
•Drain the water from the settling or service tank.
•Check and pressure-test the lube oil cooler for leaks.
•Operate the purifier continuously in purification mode
•Monitor closely after corrective action.
•Top up with fresh oil of the correct grade.
Actions and Adjustments Based on Test Results
High Total Base Number (TBN) Drop
TBN indicates the oil’s ability to neutralize acids.
Possible Causes:
•Over-extended oil life
•Wrong oil used
•Heavy contamination by combustion products
•Leaking cooler
•Inefficient filtration
Actions and Adjustments Based on Test Results
Possible Causes for High Water Content:
•Leaking cooler
•Ingress from other systems
•Condensation
•Over-extended oil use
•Heavy contamination by combustion products
Actions and Adjustments Based on Test Results
Actions to be done for High Insolubles or Soot Content:
•Improve fuel combustion quality (check injectors, compression).
•Clean or replace oil filters.
•Increase oil change frequency or run purifier longer.
•Check for blow-by in piston rings.
•Inspect wear-prone components (e.g., main bearings, camshaft).
Actions and Adjustments Based on Test Results
Actions to be done for High Total Base Number (TBN) Drop:
•Top up with fresh oil of the correct grade.
•Consider partial or full replacement of oil.
•Check cylinder oil feed rate (in 2-stroke engines).
•Adjust maintenance intervals accordingly.
•Check for blow-by in piston rings.
Actions and Adjustments Based on Test Results
Possible Causes for High Insolubles or Soot Content:
•Poor combustion
•Over-extended oil use
•Inefficient filtration
•Leaking cooler
•Ingress from other systems
Actions and Adjustments Based on Test Results
Actions to be done for Increased Metal Particles (Fe, Cu, Pb, etc.):
•Investigate source
•Inspect wear-prone components (e.g., main bearings, camshaft).
•Reduce load if possible until inspection.
•Schedule preventive maintenance or oil change.
•Drain the water from the settling or service tank.
High Viscosity or Viscosity Drop
•High viscosity → fuel dilution or water ingress
•Low viscosity → oxidation or contamination
True
False
Actions and Adjustments Based on Test Results
Actions to be done for Acid Number (TAN) Increase:
•Replace the oil.
•Investigate cause of acid build-up (e.g., poor combustion, extended oil life).
•Ensure correct purifier temperature (85–95°C).
•Reduce load if possible until inspection.
OEM (Original Equipment Manufacturer) in Lube Oil Systems
In the context of lubricating oil systems, OEM refers to the engine or machinery manufacturer who specifies:
•The correct type and grade of lube oil
•The maintenance intervals
•Approved additives and treatment chemicals
•Operating procedures for purification and filtration
Lube Oil Treatment Methods
Purification (Centrifugation)
Purpose:__________
•Remove water and solid contaminants from lube oil.
•Remove fine particles and sludge.
•Remove emulsified and dissolved water from oil.
•Dilute degraded oil and restore additive levels.
Lube Oil Treatment Methods
Filtration
Purpose:______________
•Remove fine particles and sludge.
•Remove water and solid contaminants from lube oil.
•Remove emulsified and dissolved water from oil.
•Dilute degraded oil and restore additive levels.
Lube Oil Treatment Methods
Dehydration (Vacuum Dehydration)
Purpose:_________
•Remove emulsified and dissolved water from oil.
•Dilute degraded oil and restore additive levels.
•Remove fine particles and sludge.
•Remove water and solid contaminants from lube oil.
Lube Oil Treatment Methods
Sweetening (Top-Up with Fresh Oil)
•Purpose: ___________
•Dilute degraded oil and restore additive levels.
•Remove emulsified and dissolved water from oil.
•Remove fine particles and sludge.
•Remove water and solid contaminants from lube oil.
•TBN below limit
•TAN too high
•Severe contamination or oxidation
•Flash point dangerously low
Treatment Methods and Chemicals
Type: Detergents
Function: Neutralize acidic byproducts, keep surfaces clean
False
True
Safety in Handling Chemicals
Hygiene & First Aid: (choose all the appropriate answers)
After Handling: Wash hands and arms thoroughly.
Eye Contact: Rinse eyes with water for at least 15 minutes and seek medical help.
Skin Contact: Wash with soap and water; remove contaminated clothing.
Inhalation: Move to fresh air; use oxygen if breathing is difficult.
Ingestion: Induce vomiting; seek medical attention immediately.
