What is the role of the EGR valve?

What will be an ideal response?


To reduce NOX production

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All of the following statements are true EXCEPT:

A. a replacement hose to a power booster must be reinforced and fuel resistant. B. fuel vapors can damage a power booster diaphragm. C. some hoses have an inline filter that prevents fuel from entering the power booster during a misfire in the intake manifold. D. because safety is involved, federal motor vehicle standards require brake hoses to have a burst strength of at least 3,000 psi.

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Which type of thread standard uses more threads per inch?

A) National coarse (NC) B) National fine (NF) C) AHRI standard threads D) Pipe threads

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Packaged chillers with air-cooled condensers usually use:

A) Flooded chillers. B) Direct expansion (DX) chillers. C) Hydroponic chillers. D) Hydrostatic chillers.

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You are responsible for the extrusion of a thin PE rod and find customers are complaining because it is splitting longitudinally after a relatively brief time in service. Indicate two changes you would make in each of the following: resin, extrusion conditions, postextrusion treatment. Explain

What will be an ideal response?

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