Which Foams Are Required to Extinguish Fires of Ethanol or Ethanol-Based

question 4

Multiple Choice

Which foams are required to extinguish fires of ethanol or ethanol-based fuels?

• A) Class A foams
• B) Synthetic foams
• C) Protein-based foams
• D) Alcohol-resistant foams

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Definitions:

Chi-Squared Distribution

A probability distribution used in statistical hypothesis tests that is built by squaring independent standard normal random variables.

Random Variable

A measurable variable with outcomes based on the randomness of specific incidents.

Significance Level

The threshold below which a p-value is considered statistically significant, typical levels are 0.05, 0.01, etc., indicating the probability of rejecting the null hypothesis when it is true.

Normal Population

A population in which the data follows a normal distribution, characterized by a bell-shaped curve where most observations cluster around the central peak and probabilities for values taper off symmetrically towards the extremes.