DWO Ship Operations and Maintenance 2

Question 1

When ballasting a vessel to correct a list, which tank should be filled first?

Accepted Answer

The tank on the high side

Answer

Filling the tank on the high side counteracts the list by adding weight to the lighter side.

Question 2

What is the primary purpose of a vessel's bilge system?

Accepted Answer

To remove accumulated water from the lowest part of the ship

Answer

The bilge system collects and pumps out water that accumulates in the bilges to maintain a dry, safe machinery space.

Question 3

Which factor most directly affects a vessel's metacentric height (GM)?

Accepted Answer

The distribution of weight aboard

Answer

GM is directly affected by the vertical distribution of weight; lowering heavy weights decreases the center of gravity and increases GM.

Question 4

A vessel's freeboard is measured from the waterline to which point?

Accepted Answer

The upper surface of the freeboard deck at the vessel's side

Answer

Freeboard is the vertical distance from the waterline to the upper surface of the freeboard deck at the ship's side amidships.

Question 5

What action should be taken if the fresh water daily consumption exceeds the planned rate during a voyage?

Accepted Answer

Implement water rationing and investigate the cause

Answer

Rationing conserves the remaining supply while investigating leaks, equipment failures, or excessive usage that caused the overrun.

(DWO) Deck Watch Officer Practice Test