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Class 2 (2nd Engineer) MEKM 📅 Jan 2018

Exam Question

The analysis of oil may be used as a method of monitoring the condition of the equipment that it lubricates.

(a) Explain briefly how shore analysis might test the oil

(b) State the type of information that would be expected

(c) Give possible reasons for an excess of

(i) Iron

(ii) Copper

(iii) Antimony

(iv) Tin

(v) Silica

Reference Answer

(a) Tests Conducted by Shore Analysts
Shore-based analysts utilize standardized procedures, such as those outlined by ASTM (American Society for Testing and Materials), to test lubricating oil (L.O). Common tests include:
Viscosity Test :
Oil is placed in a calibrated glass tube and settled overnight. The tube is submerged in warm baths at 40°C and 100°C. The time taken for the oil to pass between two marks in the tube is recorded multiple times. The average time is multiplied by a tube-specific constant to calculate kinematic viscosity.

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