Pipe material: Large diameter mild steel pipes reduce turbulence. Stainless steel pipes are commonly used for seawater lines. Turbulent flows cause abrasive corrosion and erosion.

Boiler water purpose: Produces steam for heating and electricity. Is used directly as drinking water onboard. Powers turbines and engines.

Out-of-range boiler water parameters: Causes scaling and corrosion. Improves boiler efficiency. Increases maintenance costs.

Cooling water consequences: Overheating of machinery may occur. Reduced fuel consumption results. Corrosion and fouling can happen.

Corrosion definition: Breakdown of metals by water and oxygen. Always beneficial to cooling systems. Can be accelerated by impurities.

Scaling effect: Improves heat transfer efficiency. Reduces heat transfer efficiency. Forms mineral deposits inside systems.

Fouling: Accumulation of materials reducing heat transfer. Increases risk of corrosion. Completely prevents corrosion.

Biofouling: Involves marine organisms like barnacles. Enhances water flow in pipes. Can obstruct water flow.

Mechanical deterioration: Caused by continuous operation of moving parts. Includes wear and tear of pumps and valves. Happens only when machinery is idle.

Maintenance costs: Increase due to system deterioration. Remain the same despite fouling and scaling. Include cleaning and frequent repairs.

Actions based on water tests: Adjusting chemical treatment. Ignoring test results until drydock. Cleaning and descaling if needed.

Blowdown rate adjustment: Removes boiler water to control impurities. Increases impurity concentration. Helps maintain water quality.

Oxygen scavengers: Remove dissolved oxygen from water. Increase oxygen content for better heat transfer. Prevent corrosion in systems.

Biocides purpose: Promote growth of algae. Control bacteria and algae. Prevent biological fouling.

Deaerator: Adds oxygen to feedwater. Removes dissolved gases from feedwater. Prevents corrosion in boiler systems.

Record keeping: Helps troubleshoot system issues. Is unnecessary for water treatment. Monitors historical trends.

Boiler treatment chemicals: Oxygen scavengers are used. Scale inhibitors are used. Only freshwater is used without chemicals.

High silica risk: Forms deposits on turbine blades. Improves turbine efficiency. Reduces turbine efficiency.

Safety training: Protects crew from hazards. Is not needed for chemical handling. Protects environment and vessel.

Day tanks: Store fuel close to engines. Replace storage tanks permanently. Ensure constant fuel supply.

Fuel purification: Removes contaminants from fuel. Prevents engine damage. Makes fuel heavier and dirtier.

Residual fuel oil: Has high viscosity. Is very light and volatile. Has high sulfur content.

Preheating residual fuel: Reduces viscosity for flow. Is unnecessary as it is naturally thin. Improves combustion properties.

Distillate oil: Has higher volatility than residual oil. Contains more sulfur than residual oil. Is a refined fuel product.

Out-of-range fuel oil parameters: Cause engine combustion problems. Have no effect on engine performance. May reduce safety margins.

Oxidation in fuel oil: Forms sludge and sediments. Is caused by air and high temperature. Improves fuel quality.

Microbial growth: Leads to fuel contamination. Improves fuel cleanliness. Degrades fuel quality.

Fuel treatment methods: Filtration and centrifugation. Heating and adding dirt. Fuel blending and desalting.

Centrifugal separator: Adds water to fuel. Removes water and solids from fuel. Uses centrifugal force to separate impurities.

Demulsifiers: Help separate water from fuel. Increase water content in fuel. Facilitate water removal during treatment.

Cetane improvers: Enhance fuel ignition quality. Increase engine knocking. Improve engine performance.

Fuel blending: Mixes heavy fuel with diesel. Makes fuel unusable. Adjusts viscosity for usability.

Tank cleaning: Prevents contamination. Maintains fuel quality. Has no effect on fuel purity.

High sulfur fuel impact: Reduces SOx emissions. Increases SOx emissions. Can harm the environment.

Mixing chemicals: Can cause hazardous reactions. Is always safe onboard. Should be avoided for safety.

Lube oil pumps: Deliver oil to machinery parts. Store oil in tanks. Provide lubrication to reduce friction.

Cylinder lubricating oil: Reduces friction on cylinder walls. Prevents wear on piston rings. Has no role in engine lubrication.

Lube oil deterioration causes: Oxidation and contamination. Pure oil composition. High operating temperatures.

Effect of deteriorated lube oil: Increased engine wear. Reduced friction and wear. Formation of sludge and deposits.