The ____ Is the Lowest Concentration of the Substance in Air

question 117

Multiple Choice

The ____ is the lowest concentration of the substance in air that will burn or explode if ignited.

• A) UEL
• B) TLV
• C) LEL
• D) STEL

---

Definitions:

Public Speaker

An individual who addresses an audience with the purpose of informing, persuading, or entertaining, typically in a formal or professional context.

Macro-Economics

the branch of economics that deals with broad economic factors, such as national income, overall price levels, and the balance of trade, among entire economies.

Sociological Issues

Social problems or conditions that affect individuals, groups, or entire societies, often requiring intervention to resolve.

Rosa Luxemburg

A Polish Marxist theorist, philosopher, economist, anti-war activist, and revolutionary socialist.