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
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 increases
B
is at a maximum when the boom is at a 45° angle to the horizontal
C
increases as the boom's angle to the horizontal decreases
D
decreases as the boom's angle to the horizontal decreases
参考解析
解析：
暂无解析
相关考题：
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
With a given load on the cargo hook，the thrust on a cargo boom ______.A.increases as the angle to the horizontal increasesB.increases as the angle to the horizontal decreasesC.is greatest at an angle of 45° and decreases as the boom is raised or loweredD.is least at an angle of 45° and increases as the boom is raised or lowered
You are on a multiple-product tanker and scheduled to load a cargo classed as an aromatic amine．This cargo is incompatible with cargoes classed as ______．A.organic anhydridesB.ketonesC.phenolsD.esters
If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur ________．A.A pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the loadB.An electromagnetic brake will hold the load where it is suspendedC.The load will fall rapidly to the deck unless the foot brake is engagedD.The load will slowly lower to the deck under control of the drag of the winch motor
Mousing a cargo hook with marline or small line ______.A.increases the lifting capacity of the hookB.protects the hook from the sling ringC.prevents the sling ring from coming out of the hookD.All of the above
大副告诉装卸工人不要用钩子装袋装货。（）A、The chief officer told the stevedores not to use hooks to load the deck cargo.B、The bosun told the stevedores not to use hooks to load the bagged cargo.C、The chief officer told the stevedores not to use hooks to load the bagged cargo.D、The bosun told the stevedores not to use hooks to load the deck cargo.
单选题If the moisture content of the cargo sample is（）the Transportable Moisture Limit,then the cargo should be safe to load.AaboveBbelowCequal toDuncertain
单选题杂货船可以用自己的吊杆装卸货物。（）AGeneral cargo ships may load and discharge by her own winch.BBulk carriers may handle cargo by her own derricks.CGeneral cargo ships may load and discharge by her own derricks.DGeneral cargo ships may load and discharge by cranes.
单选题The term "load on top" is used on many crude oil carriers, is to provide a method for （）.Acalculating the ullage in the cargo tanksBloading ballast by gravityCthe loading of new cargo into the slop tank as a procedure to minimize pollutionDcalculating the ratio of cargo expansion in a cargo tank
单选题The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when（）.Adecelerating when lowering the loadBdecelerating when raising the loadClowering the load at constant speedDraising the load at constant speed
单选题The （）(双杆联吊) is that two booms are used with a single hook.AderrickBunion purchaseCtopping lift blockDcrane
单选题For a given weight of cargo，the stress on the heel block of a cargo boom（）.Aincreases as the cargo closes the head while hoistingBincreases if the cargo runner is doubled upCdecreases as the boom is topped to a greater angleDis determined by the thrust stresses on the boom
单选题大副告诉装卸工人不要用钩子装袋装货。（）AThe chief officer told the stevedores not to use hooks to load the deck cargo.BThe bosun told the stevedores not to use hooks to load the bagged cargo.CThe chief officer told the stevedores not to use hooks to load the bagged cargo.DThe bosun told the stevedores not to use hooks to load the deck cargo.
单选题With a given load on the cargo hook，the thrust on a cargo boom（）.Aincreases as the angle to the horizontal increasesBincreases as the angle to the horizontal decreasesCis greatest at an angle of 45° and decreases as the boom is raised or loweredDis least at an angle of 45° and increases as the boom is raised or lowered
单选题Mousing a cargo hook with marline or small line（）.Aincreases the lifting capacity of the hookBprotects the hook from the sling ringCprevents the sling ring from coming out of the hookDAll of the above
单选题A bench hook is used for（）.Ahanding of cargo casesBhanding oilskingsCsewing canvasDsplicing small stuff
单选题A clause in the charter party requires a vessel’s owner to pay dispatch money when the vessel （）.Achanges berths to expedite loading or dischargingBdoes not load and discharge its cargo in the time specifiedCis not ready to load or discharge cargoDloads and discharges its cargo in less time than specified
单选题Load line regulations are designed to insure that a vessel has adequate structural strength and sufficient（）.Alifesaving equipmentBstabilityCmooring tensionDriser tension
单选题In a general cargo crane, （） is fitted to lift the cargo load.Athe slewing motorBthe luffing motorCthe hoisting motorDnone of the above
单选题（）will take three days to load the cargo.AThatBThisCItDWhat