____ requires large amounts of energy to produce, so green builders may wish to lower the embodied energy in a structure by reducing the amount of concrete in a foundation as well as the amount of cement in the concrete mix.
A. Limestone
B. Silica
C. Slag
D. Portland cement
Answer: D
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What will be an ideal response?
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An example of a pressure vessel is ____.
A. a small ship containing refrigerant cylinders B. the compressor in a refrigeration unit C. a cylinder containing refrigerant D. a portable dolly
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In order to double fan RPM, the motor horsepower
A) Must increase by a factor of 4 (2 × 2 ) B) Must increase by a factor of 8 (2 × 2 × 2 ) C) Will not be affected by the fan RPM D) Must also double
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The largest-capacity chillers use:
A) Rotary compressors. B) Centrifugal compressors. C) Reciprocating compressors. D) Scroll compressors.
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