Q3. With reference to an emergency source of electrical power in cargo ships: - a) Describe a typical power source. (8) b) Give a typical list of essential services, which must be supplied simultaneously. Explain how the emergency installation can be periodically tested. (8)
Q5. a) Which has the greater equivalent resistance; two equal capacitors in series or in parallel? Explain with reasons? (6)
b) A circuit has a resistance of 3Ω inductance of 0.01H. The voltage across its end is 60V and the frequency is 50Hz. Calculate
a) the impedance
b) the power factor
c) the power absorbed. (10)
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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