[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fZaVDwBlzFgwqwQOZvErKA2GdLY0p7Fl07O0Lt8zhZdg":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",259289810,[8,9,10,11],"non-return valves","pressure reduce valves","butterfly valves","three-way valves",{"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","Delivery lines and discharge lines to and from the pump are often fitted with_________ to prevent the liquid from flowing back",[21,32,41,50,59,64,73,82,85,94],{"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":43,"options":44,"question":49,"source":30,"type":31},[],259289805,[45,46,47,48],"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","Relief valves are usually used to _________",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],259289806,[54,55,56,57],"图像D","图像A","图像B","图像C","Generally, the symbol (GB786. 1-93) of overflow valve is _________",{"answer":60,"createTime":5,"id":61,"options":62,"question":63,"source":30,"type":31},[],259289807,[55,57,54,56],"Generally, the symbol (GB786. 1-93) of pressure reducing valve is _________",{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":30,"type":31},[],259289808,[68,69,70,71],"overflow valve","sequence valve","reducing valve","relief valve","The symbol (GB786. 1-93) represents _________",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":30,"type":31},[],259289809,[77,78,79,80],"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":83,"createTime":5,"id":6,"options":84,"question":19,"source":30,"type":31},[],[8,9,10,11],{"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"]