What safety step must be performed before starting a positive displacement pump (e.g. gear pump or reciprocating pump)?
Direct Answer
Option A: Ensure discharge valve is FULLY OPEN to prevent extreme overpressure
Positive displacement pumps, such as gear or reciprocating pumps, create high pressures against closed systems. Operating them with a closed discharge valve can cause catastrophic casing rupture or pipe failure; thus, the discharge valve must be fully open before starting.
All Options
Detailed Explanation & Context
Positive displacement pumps, such as gear or reciprocating pumps, create high pressures against closed systems. Operating them with a closed discharge valve can cause catastrophic casing rupture or pipe failure; thus, the discharge valve must be fully open before starting.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Personal Safety & Social Responsibilities (PSSR).
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