To prevent the system refrigerant from quickly dropping in temperature and pressure, refrigerant recovery should:
A) Always take place while the system is operating.
B) Only be attempted in the summer.
C) Begin with vapor.
D) Begin with liquid.
D
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Flexible foam insulation is chemically related to _____.
a. glassy minerals b. rubbers c. epoxies d. chalky minerals
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The innermost layer of the blastula is called the ______________________
Fill in the blank(s) with correct word
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One foot equals ____________________ inches.
Fill in the blank(s) with the appropriate word(s).
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Two inventions that had a profound influence on the settling of this country were the
____________________ and the ____________________.
Fill in the blank(s) with the appropriate word(s).
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