NEBOSH Practice Test

What is a significant hazard associated with Liquid Natural Gas (LNG)?

1. Environmental degradation

2. Cold Burns

3. Transportation risk

4. Minimal flammability

The correct answer is: Cold Burns

Cold burns are indeed a significant hazard associated with Liquid Natural Gas (LNG). LNG is stored at extremely low temperatures, around -162 degrees Celsius (-260 degrees Fahrenheit). When LNG comes into contact with skin or other tissues, it can result in severe frostbite or cold burns due to the rapid heat transfer from body tissues to the cold liquid. This effect can damage skin and underlying tissues, potentially leading to permanent injuries. The other choices, while relevant in various contexts, do not represent the same level of direct hazard from the handling of LNG. Environmental degradation relates to broader ecological impacts and may not be immediate in the context of LNG; transportation risk is a factor but not a direct result of LNG's physical properties; and minimal flammability is misleading because LNG is indeed flammable when it vaporizes and forms a mixture with air, though it must be in the right concentration to ignite. Thus, the danger posed by cold burns is a direct and immediate physical hazard when handling or working with LNG, making it the most significant hazard among the options provided.