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单选题
A cargo boom is a（）.
A
double sized mattress consists of more than 890 coils
B
spar extending from a mast or a king post
C
flap（Becker rudder）can be fitted to the rudder’s trailing edge
D
bridle arrangement having a long beam of the length of the container
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更多 “单选题A cargo boom is a（）.A double sized mattress consists of more than 890 coilsB spar extending from a mast or a king postC flap（Becker rudder）can be fitted to the rudder’s trailing edgeD bridle arrangement having a long beam of the length of the container” 相关考题
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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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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
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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
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
考题
If the cargo gear on your vessel is equipped with a regular guy and a preventer guy，you should ______．A.Let the schooner guy take most of the strain，thus transferring the load to the opposite boomB.Leave the preventer guy slackC.Secure them as close together as possible on deckD.Secure them so the angle between them is 90° at the boom head
考题
When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to ______．A.winch speedB.boom strengthC.load radiusD.cable strength
考题
Sudden starts or stops of the boom is likely to cause all of the following except______．A.breaking a cargo runnerB.parting guys topping liftsC.carrying away a blockD.overheating the resistors and eventually burning out
考题
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom ________．A.Cargo whipB.Gooseneck fittingC.Spider bandD.Topping lift
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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Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.A
Cargo whipB
Gooseneck fittingC
Spider bandD
Topping lift
考题
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
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On your vessel，a wire rope for the cargo gear shows signs of excessive wear and must be replaced. In ordering a new wire for this 10-ton boom，what safety factor should you use?（）A
ThreeB
FiveC
SixD
Seven
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 cargo boom is a（）.A
double sized mattress consists of more than 890 coilsB
spar extending from a mast or a king postC
flap（Becker rudder）can be fitted to the rudder’s trailing edgeD
bridle arrangement having a long beam of the length of the container
考题
单选题When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.A
winch speedB
boom strengthC
load radiusD
cable strength
考题
单选题The tackle that raises and lowers the boom is（）.A
the cargo fallB
The cargo hoisting wire ropeC
the topping liftD
the cargo whip
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If the cargo gear on your vessel is equipped with a regular guy and a preventer guy，you should（）.A
let the schooner guy take most of the strain，thus transferring the load to the opposite boomB
leave the preventer guy slackC
secure them as close together as possible on deckD
secure them so the angle between them is 90°at the boom head
考题
单选题Sudden starts or stops of the boom is likely to cause all of the following except（）.A
breaking a cargo runnerB
parting guys topping liftsC
carrying away a blockD
overheating the resistors and eventually burning out
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 jumbo boom can （）.A
lift heavy cargoB
load and unloadC
join ropes togetherD
lift light cargo
考题
单选题The majority of cargo gear breakdowns are a result of（）.A
Guy failuresB
Topping lift failuresC
Bending of the boom from compressionD
Gooseneck failure
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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