Good ventilation is important when working around refrigeration equipment because modern refrigerants ____.
A. are toxic and can poison you
B. have an unpleasant odor
C. are heavier than air and may displace the oxygen around you
D. both a and c
Answer: C
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What is a moraine from a glacier?
What will be an ideal response?
When the country’s economy is expanding, AB Investment Company is optimistic and expects a MARR of 15% on new investments. However, in a receding economy the expected return is 8%. Normally a 10% per year return is anticipated. An expanding economy causes the estimates of project life to go down about 20%, and a receding economy causes the life values to increase about 10%. Additionally, the market value after the project’s life varies widely; optimistically, it may be as high as 50% more or as low as 75% of the initial investment.
(a) Summarize the optimistic, most likely, and pessimistic estimates in tabular form.
(b) Use a spreadsheet to calculate and plot the sensitivity of PW versus (1) MARR, (2) life values, and (3) market value for possible investment in one of two locations. Use the most likely estimates for the other parameters.
(c) Considering all the analyses, under which scenario, if any, should location Miami or Houston be rejected?
All monetary values are in $1000 units.
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When recessed lighting fixtures must be installed in an insulated ceiling, Type ____________________ airtight rated models should be used.
Fill in the blank(s) with the appropriate word(s).
What is usually considered a minimum thickness for the valve margin?
What will be an ideal response?