Which nutrients need to be applied in the ebb-and-flood solution and which in the NET solution?
What will be an ideal response?
Only nitrogen and potassium and possibly phosphorus in the ebb- and
flood system. All 12 essential fertilizer nutrients in the NFT system.
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Seam welds can be made by producing a series of overlapping ____ or be one continuous resistance weld.
A. groove welds B. plug welds C. butt welds D. spot welds
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Most residential air conditioning systems operate on a control voltage of ____.
a. 12 volts AC b. 24 volts AC c. 36 volts AC d. 48 volts AC
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What refrigerants can be detected with a halide torch?
A) CFCs and HCFCs B) HCFCs C) Hydrocarbon refrigerants D) CFCs
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The zener diode is a special device designed to be operated with forward polarity applied to it.
Answer the following statement true (T) or false (F)
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