Some hybrid air conditioning systems use an electrically driven compressor that uses a special lubricant. What precaution should be taken when servicing these systems?
A) A separate recycling machine for the HEV B) Extra refrigerant filters
C) A special gauge set D) Low pressure pump
A
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Cooling towers are designed to reduce the entering water temperature to within ____°F of the air's wet-bulb temperature.
A. 35 B. 14 C. 7 D. 3
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The messages encoded in DNA transfer to the rest of the cell via a messenger substance known as _____________________ acid.
Fill in the blank(s) with the appropriate word(s).
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If there is a hole in the floor of a structure, the preferred method of protecting workers from falls is to _____.