A ____ is a metal or fiber pipe or tube used to enclose one or more electrical conductors.
A. duct
B. conduit
C. trench
D. junction
Answer: B
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Which of the following types of herbicides kills only certain types of plants?
a. knockdown c. blackout b. selective d. nonselective
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Provide two ways to modify soil pH, one to increase it and one to decrease it
What will be an ideal response?
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____________________ or hybrid vigor comes from the cross breeding of two or more breeds to get an optimal animal.
Fill in the blank(s) with the appropriate word(s).
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Why does a pressure drop not necessarily indicate a refrigerant leak?
A) It may be indicating atmospheric pressure. B) It may be indicating nitrogen presence. C) It may be indicating system shutoff. D) It may be indicating temperature change.
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