On a 95°F day, the R-22 refrigerant pressure on the high side should be about ____ psig.
A. 182
B. 108
C. 297
D. 243
Answer: D
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When exposed to salt air, the material combination used in air conditioning evaporators and condensers may be ____.
A. copper tube-stainless steel fin B. copper tube-copper fin C. copper tube-aluminum fin D. aluminum tube-aluminum fin
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Electrical blueprints (floor plans) ____ on a one-family dwelling.
A. may be optional B. are mandatory C. are recommended D. are governed by local law
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The ____ is the basis of all industrial drawings.
A. graph B. line C. vector D. object
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Graph the inverse DTFTs of these functions:
(a) X(F) = ?1(F) ? ?1(F ? 1/2) (b) X(e j? ) = j2? [ ?2? (? + ?/4) ? ?2? (? ? ?/4) ] (c) X( e j? ) = 2? [?(? ? ?/2) + ? (? ? 3?/8) + ? (? ? 5?/8) ] ? ?2? (2?)
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