________ circuits are considered to be the backbone of the network used to carry voice and data traffic
Fill in the blank(s) with correct word
T1
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Air gaps are typically ____ times the diameter of the supply pipe.
a. 1 b. 2 c. 3 d. 4
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It’s estimated that the average home has about ____ electric motors.
a. 25 b. 50 c. 75 d. 100
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Which of the following will not increase the efficiency of water use by plants in an irrigation system?
A) the use of herbicides to control weeds B) the use of drip irrigation for fruit trees C) the use of crop residues to reduce evaporation D) the use of concrete-lined delivery ditches E) the use of flood irrigation for forage crops
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In multi-zone systems with one trunk duct to each zone, what is used to adjust the temperature of the air?
A) mixing dampers B) outside air C) hot and cold decks D) fans
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