CHEMCO Exit Exam • Set 1 Question 8 of 30

What is self-polymerization in chemical cargoes?

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Direct Answer

Option D: Chemical reaction where monomer molecules join to form long polymers, generating intense heat

Cargoes like Styrene monomer or Vinyl Acetate can spontaneously polymerize, producing dangerous heat and pressure building if uninhibited.

All Options

Dissolving of cargo into seawater

Freezing of liquid into crystal ice

Evaporation of cargo into atmosphere

Chemical reaction where monomer molecules join to form long polymers, generating intense heat (Correct Answer)

Detailed Explanation & Context

Cargoes like Styrene monomer or Vinyl Acetate can spontaneously polymerize, producing dangerous heat and pressure building if uninhibited.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).

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More Questions in CHEMCO Set 1

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Q1 Which IMO Code regulates the carriage of dangerous chemicals in bulk on chemical tankers? Q2 Under MARPOL Annex II, which pollution category presents the major hazard to human health or marine resources? Q3 What test is performed on tank bulkhead surfaces to detect microscopic hydrocarbon residues before loading sensitive chemical cargoes? Q4 What type of chemical tanker skin/tank construction is required for carrying high-hazard cargoes like Isocyanates? Q5 What material is widely used for cargo tanks carrying aggressive acids such as Nitric or Phosphoric acid? Q6 What is the key limitation of Zinc Silicate tank coatings in chemical tankers? Q7 What document must be maintained on board detailing all chemical cargo loading, discharging, tank washing, and slop handling? Q8 What is self-polymerization in chemical cargoes? Q9 What mandatory document provides chemical property, health hazard, reactivity, and emergency response data for a chemical cargo? Q10 What system is used to purge chemical lines and maintain an inert nitrogen cushion over moisture-sensitive cargoes?