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
更多“An un-loader is installed on an air compressor to （）.”相关的问题
A、damage to the un-loader operating diaphragm B、an increase in current flow to the motor C、high pressure in the receiver and filter D、an excessive consumption of crankcase oil
A、a defective or broken high pressure un-loader B、a loose valve plate C、excessive overload D、no compression
A、leaking discharge valve B、jammed suction valve C、tripped overload relay D、broken discharge un-loader
A、decreased compression ratio B、higher than normal power consumption C、un-loader malfunction D、water in the lubricating oil
A、Carbon build up in the piston ring belt B、Faulty operation of a cylinder un-loader C、Compressor operation in an area of high relative humidity D、Lifting of intercooler rebel valve
A、vary their speed according to temperature and load B、start and come up to speed before air compression begins C、change speed according to overload demands D、reduce compressed air charge density
A、An EMP table is created if a table does not exist. Otherwise, if the EMP table is appended with the loaded data. B、The SQL* Loader data file myfile1.dat has the column names for the EMP table. C、The SQL* Loader operation fails because no record terminators are specified. D、Field names should be the first line in the both the SQL* Loader data files. E、The SQL* Loader operation assumes that the file must be a stream record format file with the normal carriage return string as the record terminator.
A、A configured router prompts for a password B、A configured router goes to the privileged mode prompt C、An un configured router goes into the setup dialog D、An un configured router goes to the enable mode prompt
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