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How should you signal the crane operator to lower the boom and raise the load ________．
A.Extend arm and point finger in the direction to move the boom
B.Extend arm with thumb pointing downward and flex fingers in and out
C.With forearm vertical and forefinger pointing up，move hand in small horizontal circles
D.With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
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更多 “ How should you signal the crane operator to lower the boom and raise the load ________．A.Extend arm and point finger in the direction to move the boomB.Extend arm with thumb pointing downward and flex fingers in and outC.With forearm vertical and forefinger pointing up，move hand in small horizontal circlesD.With arm extended downwards and forefinger pointing down，move hand in small horizontal circles ” 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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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
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How should you signal the crane operator to hoist ________．A.With forearm vertical and forefinger pointing up，move hand in small horizontal circlesB.With arm extended downwards and forefinger pointing down，move hand in small horizontal circlesC.Extend arm with fingers closed and thumb pointing upwardD.Place both fists in front of body with the thumbs pointing upward
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How should you signal the crane operator to move slowly ________．A.Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signaB.Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desiredC.First tap your elbow with one hand and then proceed to use regular signalsD.First tap the top of your head with your fist and then proceed to use regular signals
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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
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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
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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
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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
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How should you signal the crane operator to raise the boom?_________.A.Extend arm with the thumb pointing up and flex the fingers in and outB.Place both fists in front of the body with the thumbs pointing upwardC.With forearm vertical and forefinger pointing up，move hand in small horizontal circlesD.Extend arm with fingers closed and point thumb upward
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How should you signal the crane operator to stop?______.A.Place both fists in front of your body with thumbs pointing pointing outwardB.With both arms extended out and palms down, move arms back and forthC.Extend arm with the palm down and hold this position rigidlyD.Clasp hands in front of your body
考题
单选题How should you signal the crane operator to raise the boom?（）.A
Extend arm with the thumb pointing up and flex the fingers in and outB
Place both fists in front of the body with the thumbs pointing upwardC
With forearm vertical and forefinger pointing up,move hand in small horizond circlesD
Extend arm with the fingers closed and thumb upward
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
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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How should you signal the crane operator to move slowly（）.A
Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signaB
Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desiredC
First tap your elbow with one hand and then proceed to use regular signalsD
First tap the top of your head with your fist and then proceed to use regular signals
考题
单选题How should you signal the crane operator to swing?（）.A
With both arms extended out and palms to down, move arms back and forthB
With arm ertended downwards and forefinger pointing down,move hand in small horizontal creclesC
Extend arm and point finger in the direction to move boomD
Place both fists in front of the body with the thumbs pointing outward
考题
单选题How should you signal the crane operator to lower the boom and raise the load（）.A
Extend arm and point finger in the direction to move the boomB
Extend arm with thumb pointing downward and flex fingers in and outC
With forearm vertical and forefinger pointing up，move hand in small horizontal circlesD
With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
考题
单选题How should you signal the crane operator to stop in an emergency?（）A
Extend arm with the palm down and hold this position rigidlyB
Place clasped hands in front of your bodyC
Extend arm and move hand rapidly right and left with the palm downD
Place both fists in front of the body with the thumbs pointing outward
考题
单选题How should you signal the crane operator to stop?（）.A
Place both fists in front of the body with the thumbs pointing outwardB
With both arms extended out and palms to down, move arms back and forthC
Extend arm with the palm down and and hold this position rigidlyD
Clasp hands in front of you body
考题
单选题How should you signal the crane operator to dog everthing?（）.A
Place both fists in front of the body with the thumbs pointing outward each otherB
Clasp hands in front of your bodyC
Extend arm with the palm down and and hold this position rigidlyD
Extend arm with the thumb pointing up, and flex the finger s in and out
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How should you signal the crane operator to raise the boom and lower the load?（）.A
Extend arm with the palm down and and hold this position rigidlyB
Place both fists in front of the body with the thumbs pointing outward each otherC
Clasp hands in front of you bodyD
Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired
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In a general cargo crane, （） is fitted to raise or lower the jib.A
the slewing motorB
the luffing motorC
the hoisting motorD
none of the above
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
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