Question 10General Subjects - Assistant Engineer
70% to passWhich of the following ballasting operations performed in conjunction with off-loading cargo could be accomplished without the use of a ballast pump?
AFilling a salt water ballast tank located above the waterline.
BDraining a salt water ballast tank located above the waterline.
CDraining a salt water ballast tank located below the waterline.
DFilling a salt water ballast tank located below the waterline.
AI Explanation
The correct answer is D) Filling a salt water ballast tank located below the waterline. This is because a ballast tank located below the waterline can be filled by hydrostatic pressure, without the need for a ballast pump. The water pressure outside the hull will naturally force the water into the lower ballast tank, causing it to fill. The other options are incorrect because: A) Filling an above-waterline tank would require a pump to overcome gravity, B) Draining an above-waterline tank would also require a pump, and C) Draining a below-waterline tank would require a pump to overcome the hydrostatic pressure.
Related Questions
Q436:Referring to the illustrated diagram for a central-station hookup for a hot wate... Q324:Which of the following propulsor types represents the proper terminology for a V... Q231:A typical oily-water separator has three stages of separation. Which statement r... Q149:What is meant by the term "dead band" as it applies to prime mover speed control... Q596:In accordance with federal regulations under 33 CFR Subchapter O, for U.S non- o...
Ready to test your knowledge?
Take a General Subjects - Assistant Engineer Practice ExamOfficial Resources