Question 413General Subjects - 1st Asst/Chief70% to pass
If two centrifuges are to be simultaneously used in series to treat residual fuel contaminated with both water and solids, how should the centrifuges be configured?
AI Explanation
The correct answer is B. The first centrifuge should be set up as a purifier and the second centrifuge should be set up as a clarifier.
The reasoning behind this is that the fuel is contaminated with both water and solids. A purifier centrifuge is designed to remove water from the fuel, while a clarifier centrifuge is designed to remove solids. By configuring the centrifuges in this order, the purifier will first remove the water contamination, and the clarifier will then remove the remaining solid contaminants, effectively treating the residual fuel.
The other options are incorrect because they do not properly address the need to remove both water and solids from the fuel. Setting up the centrifuges in the wrong order or using the same type of centrifuge twice would not effectively treat the fuel.
Related Questions
#411 Planned maintenance procedures are important to maintaining the operating condition of equipment. Your vessel is a single screw vessel. How often should you exam your vessel's tail shaft in order to be in compliance with Coast Guard periodic testing and inspection regulations? #412 Suppose a water-lubricated stern tube bearing is being evaluated for wear where the propulsion machinery is located amidship. If the tailshaft diameter is 10.5 inches, according to 46 CFR regulations pertaining to periodic tests and inspections as related to machinery and equipment, what would be the maximum clearance diameter permissible before the bearing must be re-bushed? #414 Which of the following statements represents acceptable practice for heavy fuel oil settling tank heating? #415 Which of the following statements represents acceptable practice for heavy fuel oil storage tank heating? #416 For the most efficient centrifuging of residual fuels on motor vessels, the lower the viscosity of the fuel as achieved by preheating, the more efficiently solids and moisture can be removed. For planning purposes, what is the typically the recommended upper limit of preheating for residual fuel oil centrifugation on motor ships?