During compressors running the accumulated moisture in the separators must be ().
A、drained off
B、collected
C、sent to the crankcases
D、separated with oil
A、drained off
B、collected
C、sent to the crankcases
D、separated with oil
A、removing all but the frictional load during starting B、relieving intercoolers of high temperature buildups C、providing high starting torque in the drive motor D、seating valve plates during compressor shutdown
A、A.bypass the high pressure stage to the low pressure stage on 100% of the air compressors in service B、B.prevent excessive inter-stage pressure buildup C、C.control compressor discharge pressure D、D.remove all but the frictional load during starting
A、High pressure compressors are more efficient than low pressure compressors B、Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit C、Two stage compressors are generally more efficient than single stage compressors D、The volumetric efficiency is decreased in multistage compressors
A、increase compressor discharge pressure on demand B、increase compressor operating speed as necessary C、allow the motor to turn the compressor opposed only by friction D、reduce the compressor frictional load when starting
A、rotary compressors B、reciprocating compressors C、centrifugal compressors D、screw compressors
A、a shortage of refrigerant B、the compressor running continuously C、liquid refrigerant returning to the compressor D、the compressor short cycling on the high pressure cutout
A、Suez Canal searchlight, air compressor and air conditioning compressor B、Air compressor, boiler blower and refrigeration plant C、Boiler blower, Suez Canal searchlight and refrigeration plant D、Suez canal searchlight, air compressor and boiler blower