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
The boom indicator on a crane will indicate the ______．
A.Length of the boom
B.Angle of the boom
C.Lifting capacity of the boom
D.Direction of the boom
相关考题：
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
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
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
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
For any given pedestal crane，when the boom is lengthened，the lifting capacity is ______．A.unchangedB.increasedC.eliminatedD.decreased
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
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
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
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
How should you signal the crane operator to lower the boom?______.A.With arm extended and fingers closed, point thumb downwardB.With arm extended downwards and forefinger pointing down, move hand in small horizontal circlesC.Extend arm with the palm down, and hold this position rigidlyD.With hands clasped in front of your body
单选题How should you signal the crane operator to raise the boom?（）.AExtend arm with the thumb pointing up and flex the fingers in and outBPlace both fists in front of the body with the thumbs pointing upwardCWith forearm vertical and forefinger pointing up,move hand in small horizond circlesDExtend arm with the fingers closed and thumb upward
单选题The （）(笨重货) must be handled by jumbo boom or shore crane.Aawkward cargoBdrummed cargoCcased cargoDheavy cargo
单选题Which action(s) is/are included in crane operations?（）ANormal boom stowage and shutdown operationsBEmergency shutdown operationCRemoving booms from stowageDAll of the above
单选题For any given pedestal crane,when the boom is lengthened, the lifing capacity is（）.AunchangedBincreasedCeliminatedDdecreased
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（）.Araise the boomBraise the hookCraise the boom and hookDcheck the boom stop
单选题On a ship’s crane，the load chart relates the allowable load to the combination of the boom length and（）.Awinch speedBboom strengthCload radiusDcable strength
单选题The boom stops on a pedestal crane prevent the boom from（）.Abeing raised too highBswinging at seaCoverloading when not in useDbeing lowered too low
单选题What is meant by the term“luffing the boom”of a crane（）．AStopping the boomBTopping or lowering the boomCMoving the boom left or rightDAll of the above
单选题The boom stops are installed on an offshore crane to（）.Aprevent the boom from being raised too highBprevent the boom from swingingCsupport the boom when not in useDprevent the boom from being lowered
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（）.Awinch speedBboom strengthCload radiusDcable strength
单选题The load chart of a crane enables the operator to combine the load radius with boom length to determine the（）.Amaximum counter weight requiredBminimum horsepower requiredChoist rope strengthDallowable load
单选题The boom indicator tells the operator at what angle the boom is compared to the（）.Ahorizontal position of the boomBvertical position of the boomChorizontal position of the load being liftedDvertical position of the load being lifted
单选题The load chart of a ship crane enables the operator to combine the load radius with boom length to determine the（）.Amaximum counter weight requiredBminimum horsepower requiredChoist rope strengthDallowable load
单选题What does “evel-luffing” accomplish during crane operations（）.AIt prevents the load from swinging when the boom level is adjustedBLess power is needed when topping the boom with a load on the hookCIt maintains the height of the load above the deckDAll of the above
单选题0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.Avertical positionBhorizontal positionCboom stop angleDminimum radius angle
单选题The boom indicator on a crane will indicate the（）.Alength of the boomBangle of the boomClifting capacity of the boomDdirection of the boom
单选题On a ship crane，the load chart relates the allowable load to the combination of boom length and（）.Aboom angleBboom strengthCload radiusDcable strength