CHEMCO Exit Exam • Set 1 Question 5 of 30

What material is widely used for cargo tanks carrying aggressive acids such as Nitric or Phosphoric acid?

✓

Direct Answer

Option A: Stainless Steel (e.g. 316L, Duplex 2205)

Stainless steel grades like 316L or Duplex 2205 offer superior corrosion resistance, essential for aggressive acids. This material choice, detailed in tank coating and material guides, prevents cargo contamination and tank degradation.

All Options

Stainless Steel (e.g. 316L, Duplex 2205) (Correct Answer)

Aluminum alloy

Zinc silicate coating

Mild carbon steel

Detailed Explanation & Context

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

Practice Full CHEMCO Set 1

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in CHEMCO Set 1

View All 30 →

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?