AME 3 Q1 – SVE Study

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AME 3 Q1

1 / 3

Question: With reference to the hull of a vessel, describe how fatigue stress occurs whilst in a seaway.

B. The hull experiences repeated cycles of loading and unloading due to wave action.

D. Fatigue stress does not occur in modern vessel hulls.

A. The hull is subjected to constant, static pressure from the water.

C. The hull is only affected by fatigue when grounded.

B. The hull experiences repeated cycles of loading and unloading due to wave action.

Fatigue stress occurs when a material is subjected to repeated cycles of loading and unloading. In a vessel, the constant motion of waves causes the hull to flex and bend, creating these cycles of stress. Over time, this can lead to cracks and structural failure if not properly addressed.

Why the other answers are incorrect:

A. The hull is subjected to constant, static pressure from the water. This describes hydrostatic pressure, not fatigue stress. Fatigue is caused by cyclic loading.
C. The hull is only affected by fatigue when grounded. Fatigue occurs due to repeated loading and unloading, which happens continuously while a vessel is in the water, not just when grounded.
D. Fatigue stress does not occur in modern vessel hulls. This is incorrect. Fatigue is a real and significant issue in vessel design and maintenance.

Fatigue stress is specifically caused by the repeated loading and unloading of the hull structure due to wave action.

B. The hull experiences repeated cycles of loading and unloading due to wave action.

Why the other answers are incorrect:

A. The hull is subjected to constant, static pressure from the water. This describes hydrostatic pressure, not fatigue stress. Fatigue is caused by cyclic loading.
C. The hull is only affected by fatigue when grounded. Fatigue occurs due to repeated loading and unloading, which happens continuously while a vessel is in the water, not just when grounded.
D. Fatigue stress does not occur in modern vessel hulls. This is incorrect. Fatigue is a real and significant issue in vessel design and maintenance.

Fatigue stress is specifically caused by the repeated loading and unloading of the hull structure due to wave action.

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Question: With reference to the hull of a vessel: state the effect of fatigue on the hull material

D. No effect on the material.

A. Increased strength and ductility of the material.

C. Increased resistance to corrosion.

B. Gradual weakening and cracking of the material.

B. Gradual weakening and cracking of the material.

Fatigue is the progressive weakening of a material due to repeated loading and unloading. In the case of a ship hull, this weakening leads to cracks, which can eventually cause structural failure if not detected and repaired.

Why the other answers are incorrect:

A. Increased strength and ductility of the material. Fatigue actually weakens the material, leading to reduced strength and ductility.

1. Fatigue - Properties of Materials

www.ae.msstate.edu
C. Increased resistance to corrosion. Fatigue is a mechanical process related to stress cycles, not a chemical process like corrosion.

1. Fatigue (Material) - Inspectioneering

inspectioneering.com
D. No effect on the material. Fatigue has a significant impact on the material, causing it to weaken and eventually fail.

1. Fatigue Material: Types, Properties, Failure & Mechanics - StudySmarter

www.studysmarter.co.uk

Fatigue is a progressive deterioration of the material due to repeated loading and unloading, leading to cracks and reduced strength.

B. Gradual weakening and cracking of the material.

Why the other answers are incorrect:

A. Increased strength and ductility of the material. Fatigue actually weakens the material, leading to reduced strength and ductility.

1. Fatigue - Properties of Materials

www.ae.msstate.edu
C. Increased resistance to corrosion. Fatigue is a mechanical process related to stress cycles, not a chemical process like corrosion.

1. Fatigue (Material) - Inspectioneering

inspectioneering.com
D. No effect on the material. Fatigue has a significant impact on the material, causing it to weaken and eventually fail.

1. Fatigue Material: Types, Properties, Failure & Mechanics - StudySmarter

www.studysmarter.co.uk

Fatigue is a progressive deterioration of the material due to repeated loading and unloading, leading to cracks and reduced strength.

3 / 3

Question: With reference to the hull of a vessel, describe how fatigue stress occurs whilst in a seaway.

B. The hull experiences repeated cycles of loading and unloading due to wave action.

A. The hull is subjected to constant, static pressure from the water.

C. The hull is only affected by fatigue when grounded.

D. Fatigue stress does not occur in modern vessel hulls.

B. The hull experiences repeated cycles of loading and unloading due to wave action.

Why the other answers are incorrect:

A. The hull is subjected to constant, static pressure from the water. This describes hydrostatic pressure, not fatigue stress. Fatigue is caused by cyclic loading.
C. The hull is only affected by fatigue when grounded. Fatigue occurs due to repeated loading and unloading, which happens continuously while a vessel is in the water, not just when grounded.
D. Fatigue stress does not occur in modern vessel hulls. This is incorrect. Fatigue is a real and significant issue in vessel design and maintenance.

Fatigue stress is specifically caused by the repeated loading and unloading of the hull structure due to wave action.

B. The hull experiences repeated cycles of loading and unloading due to wave action.

Why the other answers are incorrect:

A. The hull is subjected to constant, static pressure from the water. This describes hydrostatic pressure, not fatigue stress. Fatigue is caused by cyclic loading.
C. The hull is only affected by fatigue when grounded. Fatigue occurs due to repeated loading and unloading, which happens continuously while a vessel is in the water, not just when grounded.
D. Fatigue stress does not occur in modern vessel hulls. This is incorrect. Fatigue is a real and significant issue in vessel design and maintenance.

Fatigue stress is specifically caused by the repeated loading and unloading of the hull structure due to wave action.

Your score is

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