How does an automatic watering system fit into the scheme of root substrate pasteurization and general greenhouse sanitation?
What will be an ideal response?
The plastic components of the watering system cannot be steamed since
they will distort. They must be sterilized since disease can carry over on them. Use
bleach or disinfectant to rinse the system. If internal contamination is suspected,
soak the components in one of the above solutions.
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____ for non-load-bearing interior walls and partitions are typically made from 18-gauge steel sheet with either solid or perforated webs.
A. Gypsum laths B. Metal studs C. Metal laths D. Gypsum wallboards
Which of the following statements is true?
A. In an isobaric system, no flow work can be added or removed, because flow work is equal to PAv and in an isobaric system P=0. B. In a closed system, no flow work is added or removed, because no material is entering or leaving the system. C. In applying the equation W_EC= -??PdV, the P always stands for the pressure inside the system. D. In applying the equation W_EC= -??PdV, the P always stands for the pressure outside the system. E. None of the above are true.
What are the requirements for pneumatic tools that operate at pressures in excess of 100 pounds per square inch?
What will be an ideal response?
Which of these is an example of a three-position actuator?
A) Bi-level air door B) Blend door C) Recirculation door D) None of these is correct