Argillic horizons are characterized by ________
A) impervious hardpan layers
B) organic matter accumulation
C) accumulation of silicate clays
D) high levels of iron and aluminum oxides
E) high level of Na+ ions
C
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Leading indicators of activity in the economy:
A) New building permits B) Current industrial production C) Labor cost per unit or output D) None of the above
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All residential alarm-sounding devices must have a minimum rating of _____.
a. 60dBA at 10' b. 75dBA at 10' c. 85dBA at 10' d. 120dBA at 10'
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Topographic features can be found on the _____.
a. elevation drawings b. section drawings c. mechanical drawings d. civil drawings
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Which of these is an example of analog device?
A) speedometer B) electric tachometer C) on-board navigational system D) Both A and B
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