Determining probable construction costs are _____ estimates
a. pre-construction
b. preliminary
c. detailed
d. resource
a
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A(n) ____ is a thin piece of metal held between two seals.
A. safety disc B. oxygen regulator C. torch valve D. safety valve
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The major difference between a petroleum-based grease and a petroleum-based oil is the ____.
A. color B. viscosity C. dependability D. odor
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What is the purpose of the zinc rod used in steel boilers?
A) It prevents corrosion by reacting with corrosive elements before they attack the boiler. B) It acts as a flame safety device. C) It cycles the burner by sensing the water temperature. D) It acts as an electrical ground for safety purposes.
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When concrete is being placed, the freefall distance should not exceed _____.