Most large commercial and industrial conditioned air systems use large ____________________ to supply the air flow that is needed to condition the structure.
Fill in the blank(s) with the appropriate word(s).
blowers
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The protein-coding instructions from the genes are transmitted indirectly through ____________________.
Fill in the blank(s) with the appropriate word(s).
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Why should PVC drain lines on rooftop units be insulated?
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Band tension is accomplished by moving and adjusting the:
A) Variable speed pulley B) Drive wheel C) Idler wheel and band tension crank D) Tensionometer
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Technician A says that the cooling system should be tested for leaks using a pressure-operated pressure pump. Technician B says the freezing and boiling point of the coolant can be tested using a thermometer. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
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