Canadian Entry To Practice (CETP) Practice Test

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All L.P. gases must be detectable by a distinct odor to a concentration in air not over what fraction of the lower limit of flammability?

1/10
1/5
1/4
1/3

The correct answer is: 1/5

In the context of safety regulations regarding Liquefied Petroleum (L.P.) gases, it's crucial that these gases are detectable by their odor at concentrations that are significantly below their flammability thresholds. This requirement is in place to ensure early detection and prevention of potential hazards such as leaks or spills. The correct answer indicates that L.P. gases must be detectable by a distinct odor at a concentration not exceeding one-fifth of the lower limit of flammability. This level enhances safety by allowing individuals to perceive a potentially dangerous gas before it reaches a concentration where it poses a significant fire or explosion risk. The regulation reflects a precautionary approach by ensuring that the warning system (the odor) remains effective at low levels of the gas, which promotes a proactive response to leaks. Other options suggest different fractions of the lower limit of flammability; however, one-fifth is recognized as a standard threshold in practice. Adhering to this guideline is essential for maintaining safety in environments where L.P. gases are used or stored, ensuring that there is ample warning for individuals to take necessary precautions before dangerous conditions are reached.