What purpose does the drain tile behind the wall serve?
a. rewets the base material
b. drains water away from behind wall
c. irrigates plants above the wall
d. it serves no purpose
b. drains water away from behind wall
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Wool that is dyed after it is woven into cloth is called _______ dyed
a. Yarn c. Stock b. Worsted d. Piece
How does reclaimed refrigerant differ from recovered or recycled refrigerants?
A) Reclaimed refrigerants can be reused. B) Reclaimed refrigerants can be put into new systems. C) Reclaimed refrigerants cannot be put back into the same system. D) Reclaimed refrigerants cannot be reused.
How does the presence of 7 to 9 percent CO2 in flue gas reflect heating unit performance?
A) It indicates a possible gas leak. B) It indicates a lack of efficiency. C) It indicates that the unit is running efficiently. D) It indicates the level of CO2 is neutral.
When dealing with combined operations of solving math problems, add or subtract from left to right.
Answer the following statement true (T) or false (F)