What are the advantages of a drop-down side curtain on a passively cooled greenhouse versus a roll-up side curtain?

What will be an ideal response?


a) When the drop-down curtain begins to open in cold weather, the
incoming cold air enters above plants where it mixes with hot air before reaching
the plants. In a roll-up system the cold air enters directly on plants chilling those
close to the curtain. b) In a windy climate and a greenhouse with an overhead
sprinkler watering system, the roll-up curtain allows air to blow in on the plants
which could divert water from plants on the windward side.

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Which of the following is LEAST-Likely to occur?

A. Pure ethylene glycol freezing at 150F. B. Pure ethylene glycol boiling at 3300F. C. Factory radiator fill being about 50% water and 50% coolant. D. A 70% concentration of ethylene glycol freezing at -850F.

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The balusters, newel post, and handrail together are called a ____.

A. tread B. stringing C. balustrade D. nosing

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In a system using a TX valve, when the air filters become restricted, the evaporator superheat will ____.

A. increase B. decrease C. remain the same D. disappear entirely

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Serial-to-parallel and parallel-to-serial converters allow computers to communicate with external devices

Indicate whether the statement is true or false

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