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Determine the probability of failure of a hip joint arthrosplasty after 15 and 30
years assuming the following (t is in years)
Infection
fi = 0.05e-t
Loosening
flo= 0.01e +0.150
Fracture
for = 0.01e+0.010
Wear
fw = 0.01e+0.10
Surgical error fsu= 0.001
fpa = 0.005
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Pain

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?