WorksheetsLO Week 18
Total questions: 20
Worksheet time: 8mins
A centrifugal separator is a rotating device used to purify lubrication oil by removing water and solid contaminants. It works on the principle of centrifugal force—heavier particles are forced outward, while lighter oil remains in the center.
True
False
Centrifugal Separators in Lube Oil Treatment
Benefits in the Lube Oil System:__________
Removes free water that causes corrosion and microbial growth
Extracts metal particles and carbon deposits
Maintains viscosity and lubricating properties
Reduces the need for frequent oil changes
Protects engine components like bearings, crankshaft, and pistons
Centrifugal Separators in Lube Oil Treatment
Mode: Purifier
Function: Separates oil from water and sludge (3 phases)
Use When: Water contamination expected
True
False
Centrifugal Separators in Lube Oil Treatment
Mode: Clarifier
Function: Removes solids only (2 phases)
Use When: Water contamination expected
True
False
Centrifugal Separators in Lube Oil Treatment
Key Components
Component: Gravity disc
Function: Determines interface level in clarifier mode
True
False
Centrifugal Separators in Lube Oil Treatment
Key Components
Component: Sludge space
Function: ______________
Collects separated solids
Control flow of oil, water, and sludge
Determines interface level in purifier mode
Rotating element where separation occurs
Centrifugal Separators in Lube Oil Treatment
Key Components
Component: Bowl
Function:___________
Rotating element where separation occurs
Regulates flow rate, temperature, and discharge cycles
Collects separated solids
Warms oil to reduce viscosity and improve separation
Centrifugal Separators in Lube Oil Treatment
Key Components
Component:______________
Function: Control flow of oil, water, and sludge
Inlet/outlet ports
Gravity disc
Heater
Control system
Centrifugal Separators in Lube Oil Treatment
Key Components
Component: ______
Function: Warms oil to reduce viscosity and improve separation
Heater
Sludge space
Gravity disc
Bowl
Centrifugal Separators in Lube Oil Treatment
Key Components
Component: Control system
Function: _________
Regulates flow rate, temperature, and discharge cycles
Warms oil to reduce viscosity and improve separation
Collects separated solids
Control flow of oil, water, and sludge
Centrifugal Separators in Lube Oil Treatment
Maintenance Best Practices:_________
•Verify motor, heater, and control panel functionality
•Replace seals, O-rings, and wear parts per maintenance schedule
•Monitor sludge accumulation and discharge effectiveness
•Check and adjust gravity disc for oil type
•Clean bowl regularly (daily/weekly depending on use)
Centrifugal Separators in Lube Oil Treatment
Advantages:_______
•Continuous operation — can run 24/7
•Efficient separation — high centrifugal force ensures effective cleaning
•Extends oil life — reduces frequency of oil changes
•Protects engine — prevents abrasive wear and corrosion
Centrifugal Separators in Lube Oil Treatment
Safety Tips:____________
•Ensure separator is isolated before cleaning or opening
•Handle hot surfaces and oil with appropriate PPE
•Dispose of sludge according to MARPOL Annex I
•Always reassemble correctly — misalignment can damage equipment
Using low Total Base Number (TBN) lube oil with Low-Sulfur Fuel Oil (LSFO) is a key aspect of adapting to IMO regulations, particularly MARPOL Annex VI, which limits sulfur emissions.
True
False
Implications of Using Incorrect TBN Oils
Scenario: Using high TBN oil with LSFO
Possible Consequences:___________
Deposits, bore polishing, oil ring sticking, over-lubrication
Insufficient acid neutralization → corrosion, wear
Implications of Using Incorrect TBN Oils
Scenario: ________
Possible Consequences: Insufficient acid neutralization → corrosion, wear
Using high TBN oil with LSFO
Using low TBN oil with HSFO
Benefits of Low TBN Lube Oil for LSFO: (choose all the correct answers)
Matches Acid Neutralization Needs
Minimizes Deposits and Wear
Improves Cylinder Cleanliness
Compliance with Engine Manufacturer Recommendations
Centrifugal Separators in Lube Oil Treatment
Choose all the parameters to be maintained for correct operating condition:
Temperature
Flow rate
Bowl speed
Discharge interval
Centrifugal Separators in Lube Oil Treatment
Parameter: Discharge interval
Ideal Range: Automatically timed or manual (depending on model)
True
False
Centrifugal Separators in Lube Oil Treatment
Parameter: Temperature
Ideal Range: ~90–95°C (reduces oil viscosity)
True
False
