Crown corrosion in sanitary sewers is caused by
a. bacteria that produce hydrogen sulfide gas and sulfuric acid
b. abrasion of the pipe wall by suspended solids in the sewage
c. normal wear and tear of the pipeline
d. excessively high wastewater flow velocities
e. acidic industrial wastewater
a
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In orthographic projection, the exact form of the object is shown by various views of the object arranged in a particular order.
Answer the following statement true (T) or false (F)
Normal water-reducing admixtures can maintain the consistency of concrete while decreasing the water content by _____.
a. 5 to 10 percent b. 10 to 15 percent c. 15 to 20 percent d. 20 to 30 percent
____________________ differ from most fresh water fish in that they have smooth skin with no scales
Fill in the blank(s) with correct word
What is the First Law of Thermodynamics?
What will be an ideal response?