Which of the following is NOT considered a contamination hazard?

Temperature fluctuations are not considered a contamination hazard in the context of fuel handling. Contamination hazards generally refer to substances or conditions that can introduce pollutants or undesirable elements into fuel, impacting its quality and safety.

Water is a significant contamination hazard because it can lead to corrosion, bacterial growth, and other chemical reactions that degrade fuel quality. Microbiological contamination involves the growth of bacteria, fungi, or other microorganisms, which can produce sludge and cause operational problems in fuel systems. Sediment, consisting of particulate matter that settles in fuel, can clog filters and impact fuel delivery systems.

In contrast, while temperature fluctuations can affect the physical state and behavior of fuel, they do not introduce contaminants in the same way. Instead, temperature changes may influence the fuel's viscosity and vapor pressure but do not constitute a contamination hazard by themselves. This distinction is crucial for understanding how to maintain fuel quality and ensure safe handling practices.