?Too light of a feed roller pressure can _______________.

A. ?prevent damage to the welding wire
B. ?be used to prevent bird-nesting
C. ?cause erratic wire feeding
D. ?help to reduce the roller's wear


Answer: C

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If the current location (start point) is (20,20), and the G-code is G03 X32 Y17 I7 J0, the center of the arc is:

A. (27,20) B. (7,0) C. (3,20) D. (20,27)

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We must ____ resources to make them last as long as possible

A) use B) preserve C) exploit D) manage

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In 1972, _____ was banned in the United States

a. pollution b. DDT c. all pesticides d. fishing

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If the purge unit on a chiller is operating very frequently, the system may have a leak.

Answer the following statement true (T) or false (F)

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