Q1. With reference to alkaline batteries used on board ship.
a) Describe the operation of a battery cell and state the material used. (8)
b) Describe how the cells are mounted to form a battery. (4)
c) State the advantages and disadvantages compared with lead-acid batteries. (4)
Q2. With reference to a 3 speed a.c. cage motor driven cargo winch:
a) Sketch a circuit diagram for a pole change motor. (8)
b) Describe how speed change and braking are achieved. (8)
Q3. With reference to electronic control systems: a) Draw a simple block diagram for temperature control (8) b) Describe each component shown in the diagram in (a). (8)
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