The signal man assisting a crane operator...

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Question 1 of 2066636ee728f7522a1c51892f

The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to __________.

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Question 1 of 20

66636ee728f7522a1c51892f

The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to __________.

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🔍 Key Concepts

• Standard hand signals used in crane operations per OSHA/ASME guidelines • The difference between boom movement and hook (load line) movement • How thumb direction (up/down) is commonly used to indicate specific crane motion

💭 Think About

• Ask yourself: when the signalman uses a closed fist and just the thumb pointing up or down, is that usually telling the operator to move the boom or the hook? • Think about what additional motion, if any, would be signaled if both boom and hook were to move together. • Consider how a different gesture would be used if the signalman wanted to move only the boom versus only the hook.

✅ Before You Answer

• Be clear on the difference between raising the boom (changing the boom angle) and raising the hook (hoisting the line). • Visualize the standard signal charts: does a simple thumb up usually involve the arm moving, or staying extended and just the thumb? • Verify whether simultaneous boom and hook movement uses a more complex signal than a single thumb-up.

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Study

Question 1 of 2066636ee728f7522a1c51892f

The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to __________.

Back

Question 1 of 20

66636ee728f7522a1c51892f

The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed