← MeoMock / Written exams
Class 4 (4th Engineer) MEKG 📅 Feb 2024

Exam Question

(a) What is meant by the term 'purification' and what does it 'separate'? (3)

(b) What are the basic methods of 'separation'? Explain the functioning of 'purifier' and 'clarifier'? (3)

(c) What is meant by the term 'interface' and what is the role of 'gravity disc' in determining the same? (4)

(d) What is 'NOMOGRAM' and how is the correct 'gravity disc' size selected? (6)

Exam question diagramExam question diagram

Reference Answer

### (a) Definition of 'Purification' and its Function
**Purification** is a mechanical separation process used extensively onboard ships to remove harmful contaminants from liquids such as fuel oil and lubricating oil before their use in machinery. It is a critical aspect of machinery maintenance and operational reliability.
The process 'separates' the following:
1. **Two Mutually Insoluble Liquids:** It separates liquids with different specific gravities that do not mix, primarily separating water from oil. This water can be fresh or saline, originating from condensation, tank leakages, or low-quality bunkers.

Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.

View plans Browse library

← Browse more questions

Prepare on Android — MeoMock on Google Play