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CHEMCO Exit Exam • Set 7 Question 25 of 30

What happens within the hull girder due to the development of bending moment due to stresses on hull are the following: find a statement that provides structural strength to the hull girder

✓

Direct Answer

Option D: The bending stress at the midship is kept within safe limits by designing the midship section with a sufficient section modulus.

Hull girder strength is maintained by ensuring the section modulus at critical points, like midship, is sufficient. This design principle, rooted in beam theory, ensures that the maximum bending stress, calculated as bending moment divided by section modulus, remains within acceptable limits, preventing structural failure.

All Options

A
A bending stress is developed at every transverse section of the hull.
B
The universal expression for bending stress is:bending stress = (bendingmoment)/(section modulus)
C
Maximum bending moment at the midship means that the bending stress at the midships will be the maximum, and hence the deciding factor for the design.
D
The bending stress at the midship is kept within safe limits by designing the midship section with a sufficient section modulus. (Correct Answer)

Detailed Explanation & Context

Hull girder strength is maintained by ensuring the section modulus at critical points, like midship, is sufficient. This design principle, rooted in beam theory, ensures that the maximum bending stress, calculated as bending moment divided by section modulus, remains within acceptable limits, preventing structural failure.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).

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