SVOP - Small Vessel Operator Proficiency Vessel Stability and Construction Questions and Answers

Question 1

Which of the following best describes the 'free surface effect' on a vessel?

Accepted Answer

The tendency of liquids in partially filled tanks or compartments to move as the vessel rolls, reducing stability.

Answer

The reduction in stability caused by water washing over the main deck.

Answer

The increase in speed when a vessel is operating in calm, glassy water.

Answer

The force of wind acting on the exposed surfaces of the vessel above the waterline.

Question 2

A vessel's operator notices that after loading new equipment on the top deck, the vessel rolls more quickly and feels 'stiff'. What has most likely happened to the vessel's stability?

Accepted Answer

The metacentric height (GM) has been excessively increased.

Answer

The center of gravity has been lowered, increasing stability.

Answer

The vessel has developed negative stability (GM).

Answer

The free surface effect has been eliminated.

Question 3

What is the primary purpose of watertight bulkheads in a vessel's construction?

Accepted Answer

To divide the hull into watertight compartments to limit the extent of flooding in case of damage.

Answer

To provide mounting surfaces for engine room equipment.

Answer

To separate different types of cargo.

Answer

To control the movement of liquids and reduce the free surface effect.

Question 4

If a weight of 10 tonnes is shifted from the main deck (Vertical Center of Gravity = 5m) to the lower hold (VCG = 2m), how will this affect the vessel's overall Vertical Center of Gravity (KG)?

Accepted Answer

The KG will lower.

Answer

The KG will increase.

Answer

The KG will remain unchanged.

Answer

The effect on KG cannot be determined without knowing the vessel's displacement.

Question 5

Which term refers to the theoretical point above the center of buoyancy through which the force of buoyancy acts when the vessel is heeled?

Accepted Answer

Metacenter (M)

Answer

Center of Gravity (G)

Answer

Keel (K)

Answer

Freeboard

Question 6

According to Transport Canada's requirements for small commercial vessels built after March 31, 2005, which standard must be used for assessing their stability?

Accepted Answer

International Standards Organization (ISO) 12217-1.

Answer

The operator's personal assessment based on experience.

Answer

Lloyd's Register of Shipping Rules.

Answer

The Canada Shipping Act, 2001, Part 1.