A Group A atmosphere contains ____.
A. hydrogen
B. 2-butanol
C. butadiene
D. acetylene
Answer: D
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The solenoid coil of a 4-way valve operates a ____ that is used to operate the main valve.
a. plug valve b. pilot valve c. piston valve d. rotary valve
The indirect cause of an accident is known as a _____.
a. Level I cause b. Level II cause c. Level III cause d. Level IV cause
You find that the CEC of a sandy loam soil at pH 5.0 is 8 cmolc/kg and at pH 8.2 it is 14 cmolc/kg. What is the most likely reason for this difference?
A) removal of Al atoms from tetrahedral layers at low pH B) ionization of carboxyl and phenolic groups to release H+ ions C) removal of Al3+ ions from the exchange complex at higher pH D) replacement of trivalent Al3+ ions with divalent Ca2+ ions at high pH E) increase in the pH-dependent charges on 1:1 type silicate clays
List three of the seven tasks the 802.15.4 MAC layer is responsible for.
What will be an ideal response?