Nearly all gasoline purchased today for fuel is a blend with 10 percent _____
A) biomass B) methanol C) ethanol D) octane
C
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While discussing the installation of a pressure plate, technician A says that grade 8 can be used for the mounting bolts. Technician B says that you need to move from bolt to bolt at least two times while tightening the bolts. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Red staining of fixtures is a symptom of which type of water problem?
a. turbidity b. hardness c. acidity d. dissolved iron
The expansiveness of a soil is determined from the values of
A) liquid limit and plasticity index. B) plastic limit and liquid limit. C) plastic limit and plasticity index. D) none of the above.
Portland and similar cements react with water (hydrate) to create a gel that hardens by absorbing ____.
A. nitrogen dioxide B. carbon dioxide C. carbon monoxide D. hydrogen monoxide