Class 2 (2nd Engineer) MEKG 📅 Mar 2023

Exam Question

With respect to refrigeration gases used on-board vessels, answer the following:

(a) Explain Ozone Depleting Potential (ODP) of conventional refrigerant gases. (5)

(b) Name the alternate refrigerant gases available and being used onboard. (5)

(c) Explain the steps you will take to ensure that release of refrigerant gases from the plant in minimized during normal operation and during maintenance activities. (6)

Reference Answer

### (a) Ozone Depleting Potential (ODP) of Conventional Refrigerant Gases (5 Marks)
**1. Definition of ODP:**
Ozone Depleting Potential (ODP) is a numerical scale that quantifies the relative potential of a chemical substance to cause ozone depletion in the stratosphere, compared to a reference substance. It is a measure of the per-kilogram impact on the ozone layer.
**2. Reference Standard:**

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