Class 4 (4th Engineer) MEKG 📅 Aug 2025

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:

(i) Hydraulic shock/buffer valves. (3)

(ii) Oil replenishing tank. (2)

(iii) Hunting gear (3)

Reference Answer

### (a) Two-Ram Hydraulic Steering Gear
A two-ram hydraulic steering gear system consists of two single-acting hydraulic cylinders arranged on opposite sides of the tiller arm. The rams are connected by a tiller, which is keyed to the rudder stock. Hydraulic pressure is supplied by an electro-hydraulic pumping unit.
**Key Components to be shown in the Sketch:**
1. **Rudder Stock:** The vertical shaft connecting the rudder to the steering gear.

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