Marine Engineering Quiz

How does poly-aluminum chloride help in the floc tank?

• It forms flocs that settle or are filtered out

• It heats the mixture for better separation

• It regulates the flow rate in the filter unit

• It cools the mixture to stabilize the system

What is the primary function of an oily water separator (OWS)?

• To ensure ships do not discharge oil-contaminated water

• To separate oil from cargo residues in tanks

• To monitor ballast water levels for pollution

• To filter air and water mixtures on vessels

A ship’s control system is upgraded with advanced sensors. How do these sensors improve system performance?

• By increasing the system’s speed and overall torque

• By reducing the lubrication requirements of the system

• By simplifying the calibration of existing components

• By allowing precise monitoring of tension and weight

What is the primary function of ballast pumps on a ship?

• Providing water for firefighting

• Managing the ship’s sewage system

• Adjusting the ship’s ballast

• Transferring shipboard fuel oil

What is the primary benefit of frequent inspections of hooks on cranes?

• Prevents load slippage and structural damage

• Aligns the load with optimized crane rotation

• Enhances the lifespan of rigging hardware

• Ensures even load distribution on the equipment

What is the primary purpose of mud boxes in bilge suction pipes?

• To facilitate smoother oil and fluid flow control

• To enhance the efficiency of drainage systems

• To adjust suction levels based on pipe configuration

• To trap large debris and protect pumps from damage

What is the primary factor that helps oil rise in the separator unit of an OWS?

• Its miscibility with water

• Its color and weight

• Its density compared to water

• Its viscosity

What is the purpose of the oil content monitor in OWS?

• To monitor temperature changes in the system

• To detect air bubbles in the filter stage

• To regulate the flow rate of the separator pump

• To ensure oil content in discharge is below 15 ppm

Data transmission between control units and sensors becomes unreliable. Why is network analysis important in this scenario?

• To recalibrate weight and tension monitoring systems

• To optimize fluid flow rates in hydraulic systems

• To update system software for improved reliability

• To verify the accuracy of transmitted data

What happens if the oil content in OWS discharge exceeds 15 ppm?

• The separator shuts down automatically until maintenance

• The discharge is redirected to the bilge tank by a 3-way valve

• The system sends an alarm but continues discharging

• The discharge is diluted with clean water