The device used for low-pressure contr

1、The device used for low-pressure contr

The device used for low-pressure control and high-pressure cutout on a compressor is called a（）AcutoutBpressure controllerCcontroller switchDcutout switch

2、Which of the motors for the devices li

Which of the motors for the devices listed below is fitted with an instantaneous overload relay?（）AFanBPumpCWinchDMachine tool

3、The device used for preventing the pas

The device used for preventing the passage of flames into enclosed spaces is called a （）.Aflame relief valveBflame stopperCsafety valveDflame arrester

4、Which of the listed devices is used to

Which of the listed devices is used to measure pressure and convert it to an electrical signal?（）ATransducerBReducerCTransformerDRectifier

5、The device used to store a charged pre

The device used to store a charged pressure for a hydraulic starting system is called the（）AreservoirBhand pumpCacceleratorDaccumulator

6、A device used to enlarge the size of a

A device used to enlarge the size of an existing bore hole，having teeth arranged on its outside circumference to cut the formation as it rotates is a（n）（）.AEnlarger bitBCasing bitCHole openerDCasing opener