topping lift（）A、千斤索B、定位滑车C、稳索D、千斤顶
topping lift（）
- A、千斤索
- B、定位滑车
- C、稳索
- D、千斤顶
相关考题：
After the performance, the singer received a bunch of flowers and took a (). A、bowB、leapC、leadD、lift
Stress on the topping lift of a swinging boom can be reduced by ______.A.rigging a back stayB.raising the boomC.increasing the mechanical advantage of the cargo purchaseD.taking all slack out of the preventer
A band or collar on the top end of a boom to which the topping lift，midships guy，and outboard guys are secured，is called the ______.A.collar bandB.guy bandC.pad eye collarD.spider band
Proper lifting technique for heavy items is:() A. to use gloves to pick up the item.B. to squat and lift from the legs.C. to have two people bend down and pick the item up.D. to bend down and lift the item up.
With a given load on the cargo hook，tension in a single span topping lift ______.A.increases as the boom's angle to the horizontal increasesB.is at a maximum when the boom is at a 45° angle to the horizontalC.increases as the boom's angle to the horizontal decreasesD.decreases as the boom's angle to the horizontal decreases
What is meant by the term“luffing the boom”of a crane ________．A.Stopping the boomB.Topping or lowering the boomC.Moving the boom left or rightD.All of the above
When instructing a crew member concerning the right way to lift a weight，you would instruct him to ______．A.Arch the back to add strength to the musclesB.Bend his knees and lift with his legsC.Bend his back and stoopD.Bend his back and stoop with arms straight
The jumbo boom can （）.A、lift heavy cargoB、load and unloadC、join ropes togetherD、lift light cargo
The （）(千斤滑车) can run the gooseneck.A、heavy derrickB、pulley blockC、topping lift blockD、guy tackle
Proper lifting technique for heavy items is:（）A、to use gloves to pick up the item.B、to squat and lift from the legs.C、to have two people bend down and pick the item up.D、to bend down and lift the item up.
单选题A flounder plate，on a topping lift，is（）.Aa fairlead blockBa swivel pin for the topping lift blockCa triangular steel plate with a hole at each cornerDthe lower block of a multiple part topping lift
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 meant by the term TOPPING THE BOOM?（）ALowering the boomBRaising the boomCSpotting the boom over the deckDSwinging the boom athwartships
单选题Stress on the topping lift of a swinging boom can be reduced by（）.Arigging a back stayBraising the boomCincreasing the mechanical advantage of the cargo purchaseDtaking all slack out of the preventer
单选题A band or collar on the top end of a boom which the topping lift, midships guy, and outboard guys are secured, is called the（）.Acollar bandBguy bandCpad eye collarDspider band
单选题When evacuating a seaman by helicopter lift，which statement is TRUE?（）AEvacuation should be from an area forward of the bridgeBThe vessel should be slowed to bare steeragewayCIf the hoist is at the stern，booms extending aft at the stern should be cradled with the topping lifts hove tautDThe litter should not be touched until it has been grounded
单选题A tackle by which the outer end of a boom is raised and lowered is the topping（）.AboomBliftCraiseDtackle
单选题Topping wires fix the height of the derricks and （） to the deck may be used to prevent fore and aft movement.AstaysBwinchesCbarrelsDbrakes
单选题The tackle that raises and lowers the boom is（）.Athe cargo fallBThe cargo hoisting wire ropeCthe topping liftDthe cargo whip
单选题With a given load on the cargo hook，tension in a single span topping lift（）.Aincreases as the boom's angle to the horizontal increasesBis at a maximum when the boom is at a 45° angle to the horizontalCincreases as the boom's angle to the horizontal decreasesDdecreases as the boom's angle to the horizontal decreases
单选题A single heavy wire made up for the topping lift is called a（）.AbaleBspanner wireCbull lineDworking guy