The person who studies insects for a living is known as a(n):
a. insectologist c. entomologist
b. pestologist d. silviculturist
C
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The process where hydrogen ions from the root hairs replace cations attracted to soil colloids is called
____.
a. ion exchange c. cation exchange b. ion replacement d. cation replacement
The primary difference between resolvers and synchros is
A) the angle between the rotor windings B) the induced voltage in the stator C) the angle between the stator windings D) none of the above
When a system is equipped with a pump-down solenoid valve, the valve _____
a. closes when the compressor starts b. opens once the demand for cooling is satisfied c. opens when the compressor shuts down d. closes before the compressor shuts down
One sheet of Type X gypsum board panel, in. thick, used on each side of a stud wall gives a fire rating of
A) 75 min. B) 30 min. C) 60 min. D) 45 min. E) 90 min.