When brazing larger joints, _____
a. use only a single orifice torch tip
b. use a soldering flux to make it easier to reach the needed temperature
c. small sections of the joint can be heated and brazed
d. a 95% tin/5% antimony solder is the best choice
c
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A PV system charge controller has a primary function of preventing the ____________________ used in a PV system from being overcharged by the PV system array.
Fill in the blank(s) with the appropriate word(s).
High bacteria counts lower milk quality
Indicate whether the statement is true or false.
Answer the following statement(s) true (T) or false (F)
1. Most single-phase motors have fractional horsepower ratings. 2. The rotor of the resistance-start, induction-run motor is the same as that of a three-phase, squirrel-cage induction motor. 3. Universal motors operate at different speeds on dc and single-phase ac. 4. Stepping motors are devices that convert mechanical movement into electrical impulses. 5. When stepping motors are used as two-phase synchronous motors, they have the ability to virtually start, stop, or reverse direction of rotation instantly.
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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