Two technicians are discussing a catalytic converter. Technician A says the exhaust mixture must fluctuate between rich and lean for the best efficiency. Technician B says the air-fuel mixture must be leaner than 14.7:1 for best performance from a three-way catalytic converter. Which technician is correct?

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


A

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The first estrus the mare will come into after giving birth is called ____________________.

Fill in the blank(s) with the appropriate word(s).

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Given the cobweb adjustment to price and quantity in the market below, which of the following statements is most correct?



A) The price in 2013 would fall to $85.
B) The price in 2013 would fall to $30.
C) The producer's decision in 2013 is to supply 100 units of output.
D) None of the above.

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The natural microbial oxidation of nitrogen released by organic matter mineralization is a major source of soil acidity

Indicate whether the statement is true or false

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An IAT is being tested. After the vehicle has been allowed to cool for several hours, a scan tool is used to observe the IAT sensor reading. When compared to the engine coolant temperature (ECT), the two temperatures should be within how many degrees F of each other:

A) 10 B) 25 C) 5 D) 15

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