MCA SV Auxiliary Equipment Part 1 Practice Questions - MCA Small Vessel Engineering - Auxiliary Equipment Part 1 (Qualifications Scotland SQA Written Examination) Exam

Compared with a safety valve, a pressure relief valve on auxiliary systems is typically designed to:

Lift fully at a set pressure and remain wide open until reseating well below set pressure (pop action for compressible fluids on boilers/steam) Open progressively to relieve excess pressure and reseat with a small blowdown, often protecting pumps and hydraulic/liquid systems Only indicate pressure and never discharge fluid Act solely as a vacuum breaker on cargo tanks

Correct Answer:

Open progressively to relieve excess pressure and reseat with a small blowdown, often protecting pumps and hydraulic/liquid systems

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