Question 39Safety & Environmental - QMED

The correct answer is D) breathing apparatus should always be used. When a cargo tank has not been certified as gas free, it is considered a confined space that may contain hazardous levels of flammable or toxic vapors. In this case, breathing apparatus must be used to ensure the safety of anyone entering the tank, as the tank atmosphere could be oxygen-deficient or contain harmful gases. Regulations and industry best practices dictate that proper personal protective equipment, including a self-contained breathing apparatus, must be used when entering a tank that has not been certified as gas free. The other options are incorrect because they do not align with the necessary safety precautions. Breathing apparatus is always required, regardless of time spent in the tank or weather conditions, as the tank atmosphere cannot be assumed to be safe without proper certification.