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Q8. With reference to tanks containing hydrocarbon liquids and vapours:

(a) Define EACH of the following terms:

(i) Explosive limits; (2)        (ii) vapour pressure; (2)      (iii) flash point. (2)

(b) Explain how the atmosphere in cargo tanks containing varying percentages of flammable gas can be maintained in a safe condition at all times. (4)

Q13.With reference to structural fire protection in passenger ship accommodation spaces:

(a) define the meaning of Class A bulkheads, stating the requirements; (4)

(b) explain how the integrity of the bulkhead is retained with respect to ventilation trunkings, where A Class bulkhead have to be penetrated. (2)

(c) discuss the design of ventilation systems with respect to location and isolation of air conditioning units, supply and exhaust fans, to prevent the spread of smoke and fire. (4)

Q8. As Chief Engineer Officer, describe the examinations that were carried out during a safety equipment survey with regard to fire safety. (10)