Q3. With reference to batteries onboard:
a) Distinguish between ‘Lead acid cell’ and ‘Alkaline cell’ (6)
b) Describe how a battery of alkaline cells may be tested for its usefulness, after a long storage and if found deficient, how it can be remedied? (6)
c) Explain how the ambient temperature is taken into account when determining the condition of the battery (4)
Q9. With reference to MARPOL Annex IV a) Draw a biological sewage treatment plant and explain the principle of operation. (8) b) Periodical maintenance and checks and tests required to be done to verify the
effectiveness of the above system. (8)
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