Prepare for the NCEES FE Other Disciplines Exam with flashcards and multiple-choice questions, each question has hints and explanations. Get ready to excel in your engineering career!

The Threshold Limit Value (TLV) is a guideline designed to assist in the control of health hazards associated with exposure to chemicals in the workplace. In this case, the chemical with a TLV of 0.5 is chlorine.

Chlorine is a highly reactive and toxic gas, and the TLV reflects the level of exposure that is considered safe for workers over a typical 8-hour workday. A TLV of 0.5 parts per million indicates that exposure to chlorine above this concentration could lead to adverse health effects, such as respiratory issues and irritation of the eyes, skin, and mucous membranes.

Understanding the significance of TLVs is crucial for ensuring workplace safety and protecting employees from harmful exposures. In contrast, the other chemicals listed—ethyl chloride, ammonia, and ethyl ether—have different TLVs, reflecting their unique properties and associated health risks. By recognizing these guidelines, individuals can implement effective safety measures and exposure controls in environments where these chemicals are utilized.

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