- With reference to transverse stresses in a vessel’s hull:
(a) state the cause of the stress when the vessel is:
(i) floating in still water;(1)
(ii) being acted on by waves;(2)
(iii) drydocked.(1)
(b) state the areas where the stress is a maximum when the vessel is:
(i) floating in still water;(1)
(ii) drydocked;(1)
(c) describe the structure that resists the stress.(4)
- (a) Define the term sheer stress.(3)
(b) Explain how the hull of a vessel may be subject to sheer stress in EACH of the following:
(i) while in a seaway;(4)
(ii) while in still water.(3)
- (a) Explain what is meant by the term pounding as applied to a vessel being driven hard in a seaway.(3)
(b) Explain how panting may often occur at the same time as pounding in heavy seas.(3)
(c) Describe how the hull is strengthened to resist panting and pounding.(4)
- With reference to a vessel’s hull:
(a) explain the meaning of EACH of the following:
(i) dynamic stress;(3)
(ii) static stress;(3)
(b) state TWO examples of EACH type of stress explained in part (a).(4)
- With reference to longitudinal stresses in a vessel’s hull:
(a) state the cause of the stress;
(b) state the areas where the stress is a maximum;
(c) describe the structure that resists the stress.
- With reference to the application of protective coatings to a vessel’s hull:
(a) state the functions that the coating should perform;(3)
(b) state the legislation that applies to certain coatings and what certification is required to comply with it;(2)
(c) outline the process for re-coating the hull of a vessel in drydock.(5)
- With reference to a vessel’s hull:
(a) state the meaning of the term racking;(2)
(b) explain how racking occurs;(4)
(c) state the structures that resist racking.(4)
- With reference to stresses and strain in vessels, describe, with the aid of a sketch, EACH of the following:
(a) panting;(2)
(b) pounding;(2)
(c) racking;(2)
(d) hogging;(2)
(e) sagging;(2)
- Explain the cause and effect of vibration on a vessel.(10)
Answer