A、A.single
B、B.Ⅱ
C、C.Ⅲ
D、D.multiple
更多“The （） stage air compressors are widely used on board the ship.”相关的问题
A、A.first stage flash chamber B、B.second stage flash chamber C、C.first stage after condenser D、D.second stage distilling condenser
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、vacuum drag from the auxiliary condensate system B、individual vacuum pumps C、a single non-condensing air ejector D、a two stage air ejector
A、dust entering the high pressure stage B、lube oil carbonization C、discharge pulsations D、inter-stage vapor lock
A、Condenser circulating water pump B、Feed-water heater drain pump C、Distillate pump D、Air ejector condenser drain pump
A、Distiller air ejector cooling medium B、Saltwater heater discharge C、First-stage internal feed box D、Second-stage internal feed box
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、the discharge temperature low B、the discharge temperature high C、the discharge pressure rise D、the inter-stage pressure low
A、a separate air ejector unit B、a direct unimpeded connection between second stage and salt water feed heater C、either by vacuum drag or an external line from the first stage via a fixed orifice D、the fixed orifice provided in the steam supply line
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