Class 2 (2nd Engineer) MEKM 📅 Mar 2023

Exam Question

As second engineer you have been requested to obtain a set of indicator card from the large slow speed engine of a recently purchased second hand ship. (16)

(a) Describe your initial checks and preparations;

(b) State with reason the types of card you would consider necessary and explain the procedure for obtaining these;

(d) State your procedure for analysis of the cards and obtaining cylinder powers.

Reference Answer

(a) Initial Checks and Preparations:
Verify that the indicator instruments (including the indicator, its connecting lines, and the planimeter used for area measurement) are in good working order. Lubricate all moving parts as needed to ensure smooth operation and prevent damage. Check that the spring fitted to the indicator is appropriate for the expected peak pressure.
Confirm that the ship is at even keel and that the propeller is fully submerged to avoid variations in engine load and pressure readings due to the ship's motion. Ideal conditions involve calm weather (minimal rolling, pitching, and wind) to minimize external influences.
Verify past records for various engine parameters and the RPM at which indicator diagrams were previously taken to establish a baseline for comparison.

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