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单选题
The tackle that raises and lowers the boom is（）.
A
the cargo fall
B
The cargo hoisting wire rope
C
the topping lift
D
the cargo whip
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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
考题
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
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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
考题
A boom vang ______.A.holds the boom down and flattens the main sailB.draws the head of the sail to windwardC.tautens the standing riggingD.douses the gaff topsail
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ASP（音频控制面板）的正常位置是（）A、MASK／BOOM开关在BOOM位；ALT／NORM开关在NORM位B、MASK／BOOM开关在MASK位；ALT／NORM开关在NORM位C、MASK／BOOM开关在MASK位；ALT／NORM开关在ALT位D、MASK／BOOM开关在BOOM位；ALT／NORM开关在ALT位
考题
单选题What is meant by the term TOPPING THE BOOM?（）A
Lowering the boomB
Raising the boomC
Spotting the boom over the deckD
Swinging the boom athwartships
考题
单选题The boom stops on a pedestal crane prevent the boom from（）.A
being raised too highB
swinging at seaC
overloading when not in useD
being lowered too low
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单选题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
考题
单选题tackle之后出现下列哪一种行为，裁判员会判罚踢？（）A
被tackle球员继续持球B
被tackle球员朝敌队阵线的方向释放球C
被tackle球员朝自己阵线的方向推球行D
tackler球员立即离开tackle
考题
单选题The boom stops are installed on an offshore crane to（）.A
prevent the boom from being raised too highB
prevent the boom from swingingC
support the boom when not in useD
prevent the boom from being lowered
考题
单选题A tackle by which the outer end of a boom is raised and lowered is the topping（）.A
boomB
liftC
raiseD
tackle
考题
单选题Tackle中，对于参与Tackle的球员以外的球员，下列说法错误的是（）。A
在持球球员将球放开后可单膝跪地操弄球B
Tackle成立后，持球球员放开球后，双脚站立的球员只能从球后方，及双方倒地球员较近阵线方向来操控球C
除被Tackle外，任何占有球的球员不能在Tackle处旁倒地D
球员不许阻止被Tackle球员传球
考题
单选题For a given weight of cargo，the stress on the heel block of a cargo boom（）.A
increases as the cargo closes the head while hoistingB
increases if the cargo runner is doubled upC
decreases as the boom is topped to a greater angleD
is determined by the thrust stresses on the boom
考题
单选题A boom vang（）.A
holds the boom down and flattens the main sailB
draws the head of the sail to windwardC
tautens the standing riggingD
douses the gaff topsail
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单选题Tackle中，下列说法错误的是（）。A
执行Tackle者必须在倒地后马上放开持球球员B
如果敌方企图操弄球，被Tackle球员必须马上放开球C
操弄球球的球员必须双脚站立D
如果被Tackle后进入极阵区，球员可达阵得分
考题
单选题Tackle中下列说法正确的是（）。A
擒捉持球员的球员都是行Tackle球员B
每个Tackle都有被Tackle球员而不一定有行Tackle球员C
被Tackle球员在卧倒在地上或坐在地上后才算倒地D
执行Tackle球员必须马上站立
考题
单选题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
考题
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 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
考题
单选题The boom indicator on a crane will indicate the（）.A
length of the boomB
angle of the boomC
lifting capacity of the boomD
direction of the boom
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