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:

Dog

A domesticated carnivorous mammal known for its loyalty and companionship as a pet, belonging to the species Canis lupus familiaris.

Retriever

In a context of data management or networking, a retriever is a mechanism or tool that fetches or extracts required data from a database or from across the internet.

Derived Class

A class in object-oriented programming that is created by inheriting properties and methods from another class.

Composition

In object-oriented programming, composition is a design principle where a class references one or more objects of other classes in instance variables, thus representing a "has-a" relationship.