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单选题
jumbo boom（）
A
重吊杆
B
吊杆
C
桅杆
D
桅梯
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On a crane, the boom indicator tells the operator what angle the boom angle is compared to the ______.A.vertical positionB.horizontal positionC.boom stop angleD.minimum radius angle
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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
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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
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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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______ the jumbo everything is ready for loading．A.ExceptB.ExceptingC.Except forD.Except that
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汉译英：“集装袋；塑料袋；塑编袋”，正确的翻译为（ ）。
A.jumbo bag；plastic woven bag；plastic bag
B.jumbo bag；plastic bag；plastic woven bag
C.plastic bag；jumbo bag；plastic woven bag
D.plastic woven bag；plastic bag；jumbo bag
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The jumbo boom can lift heavy cargo, the gantry crane can hoist containers.（）A、重吊杆吊重货和集装箱货。B、龙门吊能起吊重件货，重吊杆能起吊集装箱。C、重吊杆能起吊重件货，龙门吊能起吊集装箱。D、龙门吊吊重货和集装箱货。
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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
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What is required for proper implementation of jumbo frame support on a Cisco Nexus 2000 Series Fabric Extender？（） A、 The interface configured as FEX fabric requires the MTU to be set to jumbo.B、 The service policy must be applied to the system QoS.C、 The device defaults to jumbo frame support； no changes are required.D、 The switchport in the FEX interface must be set to MTU 9216.
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单选题The （）(笨重货) must be handled by jumbo boom or shore crane.A
awkward cargoB
drummed cargoC
cased cargoD
heavy cargo
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单选题The jumbo boom can lift heavy cargo, the gantry crane can hoist containers.（）A
重吊杆吊重货和集装箱货。B
龙门吊能起吊重件货，重吊杆能起吊集装箱。C
重吊杆能起吊重件货，龙门吊能起吊集装箱。D
龙门吊吊重货和集装箱货。
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
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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
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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
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单选题What is required for proper implementation of jumbo frame support on a Cisco Nexus 2000 Series Fabric Extender？（）A
The interface configured as FEX fabric requires the MTU to be set to jumbo.B
The service policy must be applied to the system QoS.C
The device defaults to jumbo frame support； no changes are required.D
The switchport in the FEX interface must be set to MTU 9216.
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
单选题我们每航次拆卸一次吊杆。（）A
We dismantle the jumbo boom twice a voyage.B
We dismantle the derricks once a voyage.C
We examine the derricks once a voyage.D
We dismantle the heavy derricks once a voyage.
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
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
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单选题The jumbo boom can （）.A
lift heavy cargoB
load and unloadC
join ropes togetherD
lift light cargo
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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