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中国传统文化中长期有科无技,因此容易科、技不分。()

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严格来说,我们现代所说的“科学”是中国自古就有的东西。()

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A high rate of separation between oil and water is favored by ______.

A. large size of oil globule(小球)
B. low temperature
C. high viscosity
D. high flow rate

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Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.

A. refrigerant bubbles in the lube oil
B. refrigerant reducing the lube oil viscosity
C. oxidation(氧化) of the lube oil from overheating
D. reducing the floc or cloud point of the oil

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In a chilled(冷的) water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ______.

A. increasing refrigerant pressure in the coil
B. increasing chilled water flow through the cooler
C. sub-cooling the refrigerant in the condenser
D. superheating the refrigerant in the compressor

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