The signal man assisting a crane operator...

Question 1 / 2707066636ee728f7522a1c518934

Question 1 of 2707066636ee728f7522a1c518934

The signal man assisting a crane operator has his arm extended, thumb pointing downwards, flexing fingers in and out. What does this signal mean?

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Question 1 of 27070

The signal man assisting a crane operator has his arm extended, thumb pointing downwards, flexing fingers in and out. What does this signal mean?

🔍 Key Concepts

• Standard crane hand signals used on U.S. waterfronts (often based on ANSI/ASME charts) • The difference between signals for hoisting/lowering the load vs raising/lowering the boom • How thumb direction and finger motion are combined to indicate two simultaneous crane actions

💭 Think About

• First, recall: what simple hand signal usually tells the operator just to raise or lower the boom? How is the thumb used in that signal? • Next, think: what additional hand motion is normally used to tell the operator to hoist (move the load up) or lower (move the load down)? • Now, combine them: with the arm extended and thumb pointing down, and the fingers flexing in and out, which action is the thumb telling the operator to do with the boom, and which action are the fingers telling the operator to do with the load?

✅ Before You Answer

• Verify what thumb up vs thumb down means specifically for the boom, not the load • Verify what flexing fingers in and out (as if beckoning) means for the load direction (up or down) • Confirm that the chosen option reflects two simultaneous actions: one on the boom and one on the load, both consistent with the standard meanings above

Question 1 of 27070

The signal man assisting a crane operator has his arm extended, thumb pointing downwards, flexing fingers in and out. What does this signal mean?

To raise the load and lower the boom

To lower the load and raise the boom

To raise the boom and lower the load

To lower the boom and raise the load

Question 1 / 2707066636ee728f7522a1c518934

Question 1 of 2707066636ee728f7522a1c518934

The signal man assisting a crane operator has his arm extended, thumb pointing downwards, flexing fingers in and out. What does this signal mean?

Back

Question 1 of 27070

The signal man assisting a crane operator has his arm extended, thumb pointing downwards, flexing fingers in and out. What does this signal mean?