Discuss the efficiency of CFLs compared to incandescent lights
What will be an ideal response?
CFLs require less power to produce a given amount of light and they last much longer than an incandescent light. The tradeoff for this greater efficiency is that CFLs are more expensive to manufacture than incandescent bulbs, although continued research and development of new manufacturing techniques plus the economies of mass production have brought their cost down considerably.
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The boiling point of a refrigerant should be low enough at atmospheric pressure to keep the system pressure above 0 psig when operating at low temperatures.
Answer the following statement true (T) or false (F)
The cell wall of a plant cell is composed of a substance called _____________________
Fill in the blank(s) with correct word
Which of the following best describes a bottle jack?
A. Hand actuated and rated to lift loads up to 10 tons. B. Made for heavy lifting. C. Hand actuated and made only for loads under 1 ton. D. Air operated light duty jacks.
A ____ is an ornamental shelf or structure built above a fireplace opening.
A. casing B. wainscot C. mantel D. plate rail