Question 657 Deck Safety

The correct answer is A) 1.8% to 11.5%. The flammable limit of a substance, also known as the explosive range, refers to the concentration range within which the substance can ignite and explode when mixed with air. For methyl ethyl ketone, the flammable limit is 1.8% to 11.5%, meaning the substance can only ignite and explode when the concentration is within this range. The other answer choices are incorrect because they do not accurately represent the flammable limit of methyl ethyl ketone. Providing the correct information on flammable limits is important for ensuring safe handling and storage of hazardous materials, which is a key part of the US Coast Guard Captain's License Examination.