Why should special safety protection always be used when driving ballistic concrete nails?
A) Because of broken nail bits B) Because of fumes
C) Because of flying chips of cracking concrete D) Because of random sparks
C
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The discus valve design is more efficient than a flapper valve design because ____.
A. it allows a compressor design with less clearance volume B. it operates with less spring tension C. the amount of expanded vapor in the cylinder is greater D. it will not allow liquid refrigerant in the cylinder
In order to increase the lifetime of the system, the engineers have a choice between replacing component A with one whose lifetime is distributed Exp(l/2), or replacing component B with one whose lifetime is distributed Exp(l/3).
a. Generate, by simulation, a large number (at least 1000) of system lifetimes under the assumption that component A is replaced. b. Generate, by simulation, a large number (at least 1000) of system lifetimes under the assumption that component B is replaced. c. If the goal is to maximize the mean system lifetime, which is the better choice? Explain. d. If the goal is to minimize the probability that the system fails within a month, which is the better choice? Explain. e. If the goal is to maximize the 10th percentile of the system lifetimes, which is the better choice? Explain.
A technician performs five separate service procedures with respective flat rate times of: .4 hr, .2 hr, 1.7 hr, 3.6 hr, and 2 hr. What was the total decimal equivalent time spent on these procedures?
Fill in the blank(s) with the appropriate word(s).
Vitamin ____________________ is used to form the enzyme prothrombin, which in turn helps to form blood clots.
Fill in the blank(s) with the appropriate word(s).