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MEK Exit Exam • Set 2 Question 10 of 30

What is the purpose of an air compressor intercooler?

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Direct Answer

Option C: Cool compressed air between stages to reduce volume, increase air density, and remove moisture

Multi-stage air compressors utilize intercoolers to cool compressed air between stages. Lowering air temperature reduces volume and increases density, improving volumetric efficiency while condensing out moisture to protect downstream starting air receivers from water accumulation.

All Options

A
Increase air pressure directly
B
Lubricate compressor valves
C
Cool compressed air between stages to reduce volume, increase air density, and remove moisture (Correct Answer)
D
Heat air before entering receiver

Detailed Explanation & Context

Multi-stage air compressors utilize intercoolers to cool compressed air between stages. Lowering air temperature reduces volume and increases density, improving volumetric efficiency while condensing out moisture to protect downstream starting air receivers from water accumulation.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).

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