CHEMCO Exit Exam • Set 13 Question 12 of 30

The use of sinking and dispersing chemical agents for removal of surface oil is

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Direct Answer

Option D: authorized only with prior approval

The use of sinking agents is generally prohibited due to environmental harm. Dispersing chemical agents for oil spills are authorized only with prior approval from the relevant national authority, as outlined in MARPOL Annex I and national pollution response plans, to ensure controlled and effective application.

All Options

the most common method used

too expensive for common use

generally safe to sea life

authorized only with prior approval (Correct Answer)

Detailed Explanation & Context

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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Q1 Prior to entering a cargo pump room, you should ensure that Q2 The complete details of a crude oil washing system aboard your vessel, including the operating sequences and procedures, design characteristics, a description of the system, and required personnel will be found in the Q3 You are testing a tank that contained gasoline by using a combustible gas indicator. Under testing, the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero. What is the concentration of flammable gas? Q4 Which of the following documents carried by a ship is not issued under the MARPOL convention? Q5 Which of the following conditions need NOT be satisfied while discharging oil or oil mixtures from ships into the sea? Q6 Which tanker discharge pattern would be the safest and most efficient? Q7 Ballast water exchange should be done: Q8 As per requirements of Marpol, Annex 1, all ships delivered on or after 1st Aug. 2010 with an aggregate oil fuel capacity 600 m3 and above, the oil fuel can be carried in Q9 The atmosphere in a tank is too rich when it is Q10 Reid vapor pressure is __________.