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.
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
Packaged chillers with air-cooled condensers usually use:
A) Flooded chillers. B) Direct expansion (DX) chillers. C) Hydroponic chillers. D) Hydrostatic chillers.
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?