Asphalt shingles are the most common form of roofing in the United States, comprising _____ of the residential roofing market.
A. one-third
B. two-thirds
C. one-half
D. three quarters
Answer: B
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Elevations are an essential part of the design and drawing process.
Answer the following statement true (T) or false (F)
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A clock pulse will cause the output of a J-K flip-flop to always toggle as long as the J input is HIGH and the K input is ________
Fill in the blank(s) with correct word
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Industry and Federal guidelines require that the vacuum level in an evacuated air conditioning system be measured in __________.
A. inches of mercury B. cfm C. microns D. psig
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People who are active and spend a great deal of time outdoors are more likely to experience the effects of pollution.
Answer the following statement true (T) or false (F)
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