网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
The boom stops are installed on an offshore crane to ______.
A.prevent the boom from being raised too high
B.prevent the boom from swinging
C.support the boom when not in use
D.prevent the boom from being lowered
参考答案
更多 “ 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 ” 相关考题
考题
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
考题
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
考题
The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward．This is the signal to ______．A.raise the boomB.raise the hookC.raise the boom and hookD.check the boom stop
考题
For any given pedestal crane，when the boom is lengthened，the lifting capacity is ______．A.unchangedB.increasedC.eliminatedD.decreased
考题
The load chart of a ship crane enables the operator to combine the load radius with boom length to determine the ______．A.Maximum counter weight requiredB.Minimum horsepower requiredC.Hoist rope strengthD.Allowable load
考题
What does “evel-luffing” accomplish during crane operations ________．A.It prevents the load from swinging when the boom level is adjustedB.Less power is needed when topping the boom with a load on the hookC.It maintains the height of the load above the deckD.All of the above
考题
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
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 （）(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Which action(s) is/are included in crane operations?（）A
Normal boom stowage and shutdown operationsB
Emergency shutdown operationC
Removing booms from stowageD
All of the above
考题
单选题For any given pedestal crane,when the boom is lengthened, the lifing capacity is（）.A
unchangedB
increasedC
eliminatedD
decreased
考题
单选题The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.A
raise the boomB
raise the hookC
raise the boom and hookD
check the boom stop
考题
单选题On a ship’s crane，the load chart relates the allowable load to the combination of the boom length and（）.A
winch speedB
boom strengthC
load radiusD
cable strength
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
考题
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 load chart of a crane enables the operator to combine the load radius with boom length to determine the（）.A
maximum counter weight requiredB
minimum horsepower requiredC
hoist rope strengthD
allowable load
考题
单选题The boom indicator tells the operator at what angle the boom is compared to the（）.A
horizontal position of the boomB
vertical position of the boomC
horizontal position of the load being liftedD
vertical position of the load being lifted
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The load chart of a ship crane enables the operator to combine the load radius with boom length to determine the（）.A
maximum counter weight requiredB
minimum horsepower requiredC
hoist rope strengthD
allowable load
考题
单选题When viewed from above，the best position for the guy in relation to the boom is（）.A
At a 45° angleB
At right anglesC
4 feet aft of the heel of the boomD
Parallel to the boom
考题
单选题What does “evel-luffing” accomplish during crane operations（）.A
It prevents the load from swinging when the boom level is adjustedB
Less power is needed when topping the boom with a load on the hookC
It maintains the height of the load above the deckD
All of the above
考题
单选题0n 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
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
考题
单选题On a ship crane，the load chart relates the allowable load to the combination of boom length and（）.A
boom angleB
boom strengthC
load radiusD
cable strength
热门标签
最新试卷
