In conducting a replacement study of assets with different lives, can the annual worth values over the asset’s own life cycle be used in the comparison, if the study period is (a) unlimited, (b) limited, and the study period is not an even multiple of asset lives, and (c) limited wherein the period is a multiple of asset lives? Explain your answers for each part.

What will be an ideal response?


(a) Yes, as long as assets similar to the ones under comparison (including the in-
place defender) are likely to be available in the future.
(b) No, because one or more of the asset’s life will not end exactly when the
study period ends, rendering the cost estimates wrong.
(c) Yes, as long as assets similar to the ones under comparison (including the in-
place defender) are likely to be available through the end of the study period.

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Fill in the blank(s) with the appropriate word(s).

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The logic gate that generates a HIGH (1 ) output only when all of its inputs are LOW (0 ) is the:

A) NOR gate. B) AND gate. C) NAND gate. D) OR gate.

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On a system with a TXV, one of the possible causes of evaporator flooding is _____

a. a broken TXV power element b. an excessively long liquid line riser c. a plugged refrigerant distributor d. poor contact between the TXV sensing bulb and the suction line

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The acceleration due to gravity. Create a graph that shows the acceleration due to gravity as a function of distance from the earth’s surface. Change the distance from sea level to an altitude of 15,000 m.

What will be an ideal response?

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