Q4. With reference to steering gear hydraulic systems:
A. Explain the factors that could contribute to failure of connecting flange leading to total loss of oil from the system.
B. Describe an arrangement designed to ensure that the problem would not cause steering failure.
Q7. The steering gear operation of a vessel that recently experienced a heavy storm is found to be abnormally sluggish.
a) State the reasons for possible malfunction of the gear.
b) State the corrective actions that may be carried out at sea, that will allow the vessel to continue to the nearest port.
Q6: With reference to electro-hydraulic steering gears:
A. Sketch and describe a steering gear with two 50% torque units conforming to the single failure criteria. (8)
B. State, with reasons, the precautions necessary when operating on two rams only; (4)
C. Describe the tests necessary to ascertain that the gear will operate as required when one side of the circuit develops a malfunction. (4)
Q8.a) Sketch a two-ram type hydraulic steering gear with a single Electro-hydraulic pumping unit. Show the hunting gear arrangement and indicate valve positions. (8)
b) State the purpose of, and describe the operation of (8)
i) hydraulic shock/buffer valves.
ii) Oil replenishing tank.
iii) Hunting gear.
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