What type of air is supplied through the draft hood and helps to maintain a more constant draft pressure and to lower the temperature of chimney gases?
a. primary air
b. secondary air
c. exhaust air
d. dilution air
ANSWER: d
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The compound interest rate per year that amounts of $1000 one year ago and $1345.60 one year hence are equivalent to is closest to:
(a) 8.5% per year (b) 10.8% per year (c) 20.2% per year (d ) None of the above
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Ammonium fertilizers decrease soil pH; nitrates tend to raise pH
Indicate whether the statement is true or false.
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____ is a material's ability to conduct an electric current.
A. Conductivity B. Coercion C. Magnetism D. Density
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Why does a pressure drop not necessarily indicate a refrigerant leak?
A) It may be indicating atmospheric pressure. B) It may be indicating nitrogen presence. C) It may be indicating system shutoff. D) It may be indicating temperature change.
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