When Comparing Types of Catalytic Technology Used by Diesel Engines

question 18

Multiple Choice

When comparing types of catalytic technology used by diesel engines and spark-ignition engines, which of the following catalyst technologies reduces just NOx (oxides of nitrogen) ?

• A)Two-way (oxidation) catalytic converter"
• B)Three-way catalytic converter"
• C)DOC (diesel oxidation catalyst)
• D)Selective catalytic reduction using liquid (SCR-L)"

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Definitions:

Variation

A measure of how much values in a dataset differ from the mean of the population or from each other.

F-Statistics

A ratio used in ANOVA tests to determine if there are significant differences between group means.

Independent Samples

Sets of data collected from two groups where the subjects in one group have no relation to the subjects in the other.

Total Variation

The overall measure of the spread or dispersion within a set of data points or observations.