A group of crows is called a:
A. gaggle
B. murder
C. rafter
D. covey
Answer: B
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You need a device to sense boxes passing on a conveyor, a sensing distance of 5 feet, that will have all sensor units that require power on one side of conveyor. What is the best sensor to use?
A) Diffuse photoelectric B) Transmitted beam photoelectric C) Retroreflective photoelectric D) Capacitive proximity E) None of the above
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The rated output for a MC7912 is
A) -12 V B) 9 V C) 12 V D) -9 V
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Job-built forms for square or rectangular columns are built of plywood sheets and battens of _____.
a. 2" × 8" lumber b. 2" × 6" lumber c. 2" × 4" lumber d. 2" × 2" lumber
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Gas appliances are heavyweight, so there are special foundation requirements.
Answer the following statement true (T) or false (F)
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