[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fkykAEdmo1_yZdK_mLn04lRQ7iypxx5T8xSr3sjUvB6U":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-11 07:28:39",259289805,[8,9,10,11],"control the direction of oil flow","make the pressure after relief valve steady","control the fluid flow through it","prevent the pressure before relief valve over the specified value",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},111,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","exam_168395826","军事理论","Relief valves are usually used to _________",[21,32,41,44,53,58,67,76,85,94],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],259289803,[25,26,27,28],"Stop valve","Relief valve","Direction control valve","Pressure control valve","What type of valve is used to direct the flow of hydraulic fluid","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],259289804,[36,37,38,39],"high pressure overflow","direction of oil flow","bypass of filter","back pressure of return oil","Check valve isn't used to control _________",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],259289806,[48,49,50,51],"图像D","图像A","图像B","图像C","Generally, the symbol (GB786. 1-93) of overflow valve is _________",{"answer":54,"createTime":5,"id":55,"options":56,"question":57,"source":30,"type":31},[],259289807,[49,51,48,50],"Generally, the symbol (GB786. 1-93) of pressure reducing valve is _________",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":30,"type":31},[],259289808,[62,63,64,65],"overflow valve","sequence valve","reducing valve","relief valve","The symbol (GB786. 1-93) represents _________",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":30,"type":31},[],259289809,[71,72,73,74],"Check valves","Safety valves","Relief valves","Reducing valve","_________is\u002Fare used to limit the pressure in any particular portion and mainly control the pressure after the valve",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":30,"type":31},[],259289810,[80,81,82,83],"non-return valves","pressure reduce valves","butterfly valves","three-way valves","Delivery lines and discharge lines to and from the pump are often fitted with_________ to prevent the liquid from flowing back",{"answer":86,"createTime":5,"id":87,"options":88,"question":93,"source":30,"type":31},[],259289811,[89,90,91,92],"stop valves","relief valves","reducing valves","direction control valves","_________are used to protect the system from over pressure",{"answer":95,"createTime":5,"id":96,"options":97,"question":102,"source":30,"type":31},[],259289812,[98,99,100,101],"regular observation","regular operation","regular inspection and servicing","regular testing","Maintenance requirements for the deck machinery are usually minimal but _________should be undertaken"]