What are the two main types of hydroponic systems used to grow plants?

What will be an ideal response?


Solution culture and substrate or medium culture.

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Which of the following are used to minimize standing hazards?

A) Anti-fatigue mats B) Foot rails C) Sit/stand chairs D) All of the above

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The ____ method of heating uses a high-frequency electrical current to establish a corresponding current on the surface of the part.

A. furnace B. induction C. dip D. resistance

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A lack of power from an engine equipped with gasoline direct injection could be due to ________

A) Noisy injectors B) Carbon on the intake valves C) Carbon on the injectors D) Both B and C

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The solid oxide fuel cell is used to ____.

A. power a traction motor B. replace the alternator C. produce carbon monoxide D. store hydrogen

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