What is the minimum water-cement ratio for complete hydration of Portland cement?
What will be an ideal response?
w-c ratio = 0.4 approximately, i.e., 0.4 lb of water in 1 lb of Portland cement.
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When the chimney is completed, you should check to make sure that the chimney creates a good draft.
Answer the following statement true (T) or false (F)
Data from a 6-ft by 6-ft inductive loop detector collected during a 30-second time period indicate that the mean speed of traffic is 50 mi/h among the 16 vehicles counted. Assume an average vehicle length of 19 ft. Determine the density and occupancy.
What will be an ideal response?
What is the recommended maximum number of grains per pound of material in the water supplied to an atomizing humidifier?
A. 10 B. 50 C. 100 D. 125
What material, used in friction linings, may cause lung damage with repeated exposure?
A) Ceramic fiber B) Carbon fiber C) Asbestos D) Fiberglass