The（）(千斤索) is a wire used to take the weight off.A、light derrickB、union purchaseC、topping liftD、heavy derrick
The（）(千斤索) is a wire used to take the weight off.
- A、light derrick
- B、union purchase
- C、topping lift
- D、heavy derrick
相关考题：
What is the accepted standard for wire rope falls used in connection with the lifeboat gear ________．A.Six by seven galvanized wire ropeB.Six by twenty-four improved plow steel wire ropeC.Six by thirty-seven preformed fiber-core wire ropeD.Six by nineteen regular-lay filler wire rope
Finally, a wire brush should be used on all bare （）to remove the last of the scale.A、metalB、woodC、cementD、all the above
A （）(钢丝刷) should be used on all bare metal to remove the last of the scale.A、wire brushB、wire ropeC、wire rodD、wire rope clip
单选题A short splice in a line（）.Adecreases the size of the lineBshould be used if the line is going through a blockCshould only be used in wire ropeDdoubles the size of the line
单选题Which is normally used to hold wire rope for splicing（）.ACome alongBJiggerCRigger's screwDSealing clamp
单选题The parts of the derrick are: derrick boom rest, gooseneck, center guy, stay, topping lift, topping lift block and so on.（）A吊杆的部件有：吊杆支架、鹅颈头、中心稳索、支索、千斤索和千斤索滑车组等。B吊杆的部件有：鹅颈头、中心稳索、千斤索、侧稳索、千斤索滑车组和支索等。C吊杆的部件有：中心稳索、侧稳索、吊杆支架、鹅颈头、千斤索、和千斤索滑车组等。D吊杆的部件有：侧稳索、中心稳索、鹅颈头、吊杆支架、千斤索、和千斤索滑车组等。
单选题What is the accepted standard for wire rope falls used in connection with the lifeboat gear?（）ASix by seven galvanized wire ropeBSix by twenty-four improved plow steel wire ropeCSix by thirty-seven preformed fiber-core wire ropeDSix by nineteen regular-lay filler wire rope
单选题A serving mallet is used in（）.Acovering wire or fiber ropeBforcing fids into a lineCdogging hatchesDsplicing lines
单选题A fid is a（）.Amallet used when splicing wire ropeBsharp pointed crow bar used to unlay wire ropeCtapered steel pin used to separate wire ropeDtapered wooden pin used when splicing heavy rope
单选题A common class of wire rope used for mooring is the 6x19 class. What does the 6 represent?（）AFactor of safetyBNumber of wires per strandCNumber of strands per wire ropeDNumber of wires in the core
单选题What is an advantage of having wire rope with a fiber core over that of a wire rope of the same size with a wire core（）.AFiber core rope offers greater strengthBFiber core rope offers greater flexibilityCFiber core rope can be used at higher operating temperaturesDFiber core rope is the only type authorized for cargo runners
单选题A deck fitting，used to secure line or wire rope，consisting of a single body with two protruding horns is called a（）.AbittBbollardCcapstanDcleat
单选题A device commonly used to secure the pendant wire when it is initially passed to an anchor handling vessel is（）.Apelican hookBconnecting linkCshackleDretaining hook
单选题对一确定的轻型单千斤索单杆而言，若所吊货物的重量一定，则千斤索所受张力的大小：（）A随吊杆长度与吊杆承座至千斤索眼板座之间高度比值的增大而变大B随吊杆长度与吊杆承座至千斤索眼板座之间高度比值的减小而变大C随千斤索长度与吊杆承座至千斤索眼板座之间高度比值的增大而变大D随千斤索长度与吊杆承座至千斤索眼板座之间高度比值的减小而变大