Rhizobia bacteria convert atmospheric nitrogen into:
a. NO2 c. NH3
b. N2 d. N3
C
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Figure 3-10A shows a three position selector switch. When the operator is in the center position, ____.
a. Contact 1 is open
b. Contact 2 is open
c. Contact 3 is closed
d. Contact 4 is open
A problem with the gas tungsten arc welded ____ joint is trying to ensure that 100% of the root is fused.
A. edge B. square butt C. tee D. butt
Insects can have one of these three types of life cycles—_______________ metamorphosis, ____________________ metamorphosis, or ____________________ metamorphosis
Fill in the blank(s) with correct word
A vibration is felt in the steering wheel during braking only. A common cause of the vibration is ________
A) Warped or nonparallel front disc brake rotors B) Worn idler arm C) Loose or defective wheel bearings D) Out of balance front tires