In the heating mode, the reversing valve will normally be _____.

a. energized
b. de-energized
c. back-seated
d. front-seated


b. de-energized

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(a) As explained in Sec. 10.10, a ternary alloy may have a ternary eutectic point, at which four phases may coexist. Describe the nature of these four phases. How many degrees of freedom are there when the four phases coexist in a ternary alloy?    What is the meaning of this?

(b) A ternary alloy may also have a three?phase field. How many degrees of freedom will there be in the three?phase field? Explain the significance of this number of degrees of freedom. (c) In a ternary alloy a single?phase field may also occur. How many degrees of freedom will it contain?

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Divide the following fractions and reduce to lowest terms:3 3/4 ÷ 1/8 =

What will be an ideal response?

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What device helps you manage a WLAN that consists of many APs?

A. heavyweight AP B. wireless controller C. wireless distribution system D. wireless router

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The control that stops the condensing unit if the head pressure climbs too high is classified as a ____.

A. safety control B. thermostat C. temperature control D. speed control

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