Class 4 (4th Engineer) MEKG 📅 Oct 2022

Exam Question

(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

Reference Answer

### (a) Two-Ram Hydraulic Steering Gear
A sketch of a two-ram electro-hydraulic steering gear would illustrate the following key components integrated into a functional system. The system operates on the principle of converting electrical power into hydraulic power to produce the mechanical torque required to turn the rudder.
**Key Components to be Illustrated in the Sketch:**
1. **Tiller Arm:** A lever keyed to the top of the rudder stock. The linear motion of the rams is converted into the rotary motion of the rudder stock via the tiller.

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