英语PNEUMATIC指（）A、电动的B、气动的C、电磁阀D、转换器
英语PNEUMATIC指（）
- A、电动的
- B、气动的
- C、电磁阀
- D、转换器
相关考题：
Words with such clusters as “ch”, “ph”, “pn”, “rh” as in chasm, phone, pneumatic and rhetoric are most probably of _________ origin. A.GermanB.ChineseC.GreekD.Latin
下列词义的引申中,属于换喻的是() A、英语“pen”本义是“羽毛”，引申义为“笔”B、法语“bureau”本义是毛布，后来指铺毛布的“办公桌”C、俄语“ЯЗЫК”本义是指“舌头”，后用来指“语言D、汉语“习”本义是“鸟反复练习飞行”，后来指“复习、温习”之义E、英语window本义是窗口，现在用来指电脑桌面操作系统
Restrictions occurring in the small orifices(孔) of pneumatic control system components can be caused by ______.A.moisture in the compressed air supplyB.excessive dryness in the compressed air supplyC.pressure surging in the compressed air receiverD.insufficient lubrication of the system components
Which device is designed to automatically hold the load if power should fail to an electric winch?A.Pneumatic brakeB.Electromagnetic brakeC.Hand brakeD.Motor controller
The pneumatic containers which store bulk dry mud additives and cement on a ship are called ______．A.Mud hoppersB.Bulk binsC.P-tanksD.Mud tanks
单选题Condensate must be drained periodically from the air compressor receivers to prevent （）.Asecond stage cylinder lockupBoil sump contaminationCfaulty operation of pneumatic valvesDcorrosion of air receiver baffles
单选题Restrictions occurring in the small orifices of pneumatic control system components can be used by （）Amoisture in the compressed air supplyBexcessive dryness in the compressed air supplyCpressure surging in the compressed air receiverDinsufficient lubrication of the system components
单选题The pneumatic containers which store bulk dry mud additives and cement on a ship are called（）.Amud hoppersBbulk binsCP-tanksDmud tanks
单选题The two most common gases used in pneumatic system are （）Acompressed air and nitrogenBhelium and nitrogenCoxygen and hydrogenDoxygen and acetylene
单选题In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have（）.Areset actionBproportional actionCtwo position actionDrate action
单选题Compressed air is used on board ship （）.Afor starting diesel enginesBin pneumatic control systemCin pneumatic toolsDAll the above are true
单选题The hand steering is a method by which the motion of the rudder is controlled with （）.Aa motor-driven steering wheelBa pneumatic steering wheelCa hand-driven steering wheelDan electric steering wheel
单选题If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the （）.Acontrol air systemBforced draft air systemCsupply air systemDships service air system