The internal friction of a lubricant caused by molecular attraction is called ____.
A. lubrication
B. viscosity
C. hydrocarbon
D. semisolid
Answer: B
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The symbol for a limit switch illustrates a ball float.
Answer the following statement true (T) or false (F)
In preparation for a public hearing, an engineer needs to estimate the travel time savings for a proposed highway bypass of a small city in a rural area. The existing highway goes through the downtown area for 3.5 miles between the points where the bypass will connect. If the engineer anticipates a standard deviation of 5 mi/h, and would like a 95% confidence of estimating the mean speed within ±3.0 mi/h, how many runs should a travel time study include? If the engineer measures an average speed of 34.9 mi/h through the town and the bypass is expected to operate at speeds of 65 mi/h over a distance of 5.6 miles, what is the expected travel time saving per vehicle?
What will be an ideal response?
In order to work with plants indoors, horticulturists should be familiar with their names, their ____,
and how they were used throughout history.
a. external use c. sensation b. ancestral habitats d. natural soil
When using the stair-stepping method to install three-tab shingles, as described in the text, how many courses of shingles do you run before starting again with a full shingle?
A) 1 B) 2 C) 3 D) 4