How many essential elements do most plants require for normal plant growth and development?
What will be an ideal response?
Sixteen elements are required by most plants.
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Per NFPA 90A , fiberglass duct may be used in systems that operate with a maximum temperature of _____.
a. 100°F b. 150°F c. 200°F d. 250°F
A ____ is bark on the edge of lumber or the surface from which the bark has fallen.
a. warp c. pitch pocket b. knot d. wane
Technician A says that all bleeder valves must be located at the highest part of the caliper or wheel cylinder. Technician B says that all bleeder valves have a hole in the center. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
The position at which a set of DC motor armature conductors are moving parallel to field flux is called the _________________________.
Fill in the blank(s) with the appropriate word(s).