Alghanim Industries Interview Questions and Answers

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Q1. What are TWA (Time-Weighted Average) and TLV (Threshold Limit Value)?
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TWA is the average exposure to a substance over a specified period, while TLV is the maximum concentration a worker can be exposed to.
• TWA is calculated by averaging exposure levels over a specific time period, such as an 8-hour workday.

• TLV is the maximum concentration of a substance that a worker can be exposed to without adverse effects.

• TWA helps in assessing long-term exposure risks, while TLV sets limits to prevent ...read more
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Q2. What is the threshold limit value (TLV) for ammonia?
Ans. 
The threshold limit value (TLV) for ammonia is 25 parts per million (ppm) as an 8-hour time-weighted average (TWA).
• TLV for ammonia is 25 ppm as an 8-hour TWA

• TLV for ammonia is 35 ppm as a short-term exposure limit (STEL) for a 15-minute period

• TLV for ammonia is set by the American Conference of Governmental Industrial Hygienists (ACGIH)
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