The single most important variable in soil compaction is the _____.
a. moisture content
b. type of soil
c. compacting equipment
d. compaction method
Answer: A
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Light enters the eye through a transparent layer called the _____.
a. retina b. pupil c. cornea d. lens
Using a restrictor, liquid refrigerant can be charged into the low-side of the system with the system operating.
Answer the following statement true (T) or false (F)
As environmental temperature approaches body temperature of an animal, heat losses by
radiation, conduction, and convection decrease. A. True B. False
What would the mixed air temperature be for a system with 20% outdoor air if the outdoor temperature is 90°F and the return air temperature is 80°F?
A) 0.2 × 90°F = 18°F; 0.8 × 80°F = 64°F; 18°F + 64°F = 82°F mixed air temperature B) (90°F + 80°F) ? .4 = 68°F C) 0.8 × 90°F = 18°F; 18°F + 80°F = 98°F mixed air temperature D) ( 90°F + 80°F ) / 2 = 85°F mixed air temperature