In 2004, What System Became a Requirement on Highway Compliant

question 15

Multiple Choice

In 2004, what system became a requirement on highway compliant diesel engines to meet tough emissions standards?

• A) Diesel particulate filters (DPFs).
• B) Selective catalytic reduction (SCRs).
• C) Positive crankcase ventilation (PCV).
• D) Exhaust gas recirculation (EGR).

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Definitions:

Cognitive Flexibility

The mental ability to switch between thinking about two different concepts, or to think about multiple concepts simultaneously, essential for problem-solving and understanding complex concepts.

Rote Learning

A strategy for remembering by repeatedly going over the material, typically without grasping its deeper meaning.

Phonetic Learning

The process of learning how to recognize, produce, and manipulate the sounds within a language.

Kohlberg's Theory

A theory of moral development that outlines how individuals progress through different stages of moral reasoning from childhood through adulthood.