How often should live circuits be worked on?
A) When somewhat necessary B) Only when absolutely necessary
C) When the power goes out D) Whenever deemed necessary
B
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The jack shown in the figure above is a(n) _____.
a. screw jack b. toe jack c. bottle jack d. ratchet jack
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_____ is the most vital natural resource for human life and survival
a. Water b. Wildlife c. Waterfowl d. Gold
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When exposed to salt air, ____ should be used for the screws to secure the sheet metal of cabinets of air conditioning equipment.
A. copper B. stainless steel C. iron D. tin
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Sweet clover was once commonly used as a nitrogen source
Indicate whether the statement is true or false
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