Nitrification is a two-step process with nitrite (NO2-) being formed in step one and then nitrite being oxidized to nitrate (NO3-) in step 2. Which bacteria are responsible for step 1?
a. Nitrobacter
b. Nitrosomonas
Ans: b. Nitrosomonas
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If an engine is described as square, which of the following would be true?
A. Flat configuration B. Must be an in-line 4 or 6 cylinder C. Must be a 90 degree V configuration D. Bore and stroke dimensions are equal
In a(n) ____________________ system, the DC systems are required to be bonded to the AC systems with a single grounding bar allowed.
Fill in the blank(s) with the appropriate word(s).
The market boundary is:
A) the extent of a market area. B) an agreed-upon boundary beyond which competition will not sell. C) the line between two or more supply sources where the landed cost is the same. D) a location beyond which a source cannot supply. E) a legal limitation placed on the delivery of goods.
The term used to describe the speed regulation provided by a tachometer is __________.
A. torque control B. damping C. stability D. attenuation