Technician A says that EGR (Exhaust Gas Recirculation) is usually not needed at idle, and not wanted at wide-open throttle for maximum engine performance, or when the engine is cold. Technician B says that oxides of nitrogen (NOx) are formed inside the combustion chamber due to heat exceeding 4500°F. Which technician is correct?

A) Technician A B) Technician B C) Both technicians D) Neither technician


A

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? In the distribution below, what is the median?            4, 6, 7, 9, 12, 17, 19

A. ?9 B. ?10 C. ?12 D. ?74

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? Identify and state the historical significance of the Freedmen's Bureau.

What will be an ideal response?

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To determine if a product or substance being used is hazardous, consult ________

A) SAE standards B) EPA guidelines C) A dictionary D) An MSDS

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The main difference between a miter gear and a bevel gear is the ratio of teeth.

Answer the following statement true (T) or false (F)

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