单项选择题
Which is the pollution prevention equipment?（）
A.booster pump
B.evaporator
C.incinerator
D.cooler
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相关考题
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单项选择题
Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of （）.
A.wax precipitation in the lube oil
B.contamination by dust, scale, or moisture
C.refrigerant bubbles in the lube oil
D.refrigerant reducing the lube oil viscosity -
单项选择题
In a chilled 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 -
单项选择题
A re-heater in an air conditioning system functions to （）.
A.control inlet air temperature
B.control inlet air volume
C.maintain relative humidity at 15%
D.restore conditioned air temperature to a comfortable level
