For an electro-hydraulic cargo-handling...

Question 1 / 205eccef9cbacbc34ba4d45af7

Question 1 of 205eccef9cbacbc34ba4d45af7

For an electro-hydraulic cargo-handling pedestal-type deck crane, what event would result in an immediate stop to all crane motions, including slewing, hoisting, and luffing?

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Question 1 of 20

5eccef9cbacbc34ba4d45af7

For an electro-hydraulic cargo-handling pedestal-type deck crane, what event would result in an immediate stop to all crane motions, including slewing, hoisting, and luffing?

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🔍 Key Concepts

• Electro-hydraulic crane safety circuits and which devices are designed as an overall emergency stop vs. local/limited protection • Difference between limit switches (for position or outreach) and overload / slack wire protection (for load-related hazards) • Effect of a total power loss on hydraulic and electric systems and whether motion can coast or drift

💭 Think About

• Ask yourself: Which of these events is specifically designed to shut down every motion of the crane, not just one direction or one function? • Consider the purpose of outreach limit switches vs. overload/slack wire switches: which protects structure/geometry and which protects from dangerous loading conditions? • Think about what physically happens to hydraulic circuits when electrical power is lost—do motions necessarily stop instantly, or can they continue briefly or drift under load/pressure?

✅ Before You Answer

• Identify which devices are position limit switches (only stop motion at extreme positions) and which are load/line safety cutouts (protecting against overload or slack wire). • Confirm which options could realistically stop slewing, hoisting, and luffing all at once, by interrupting a common control or power circuit. • Verify in your crane theory or manufacturer diagrams how an emergency or safety cutout is wired in relation to all motion control valves.

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Question 1 of 20

For an electro-hydraulic cargo-handling pedestal-type deck crane, what event would result in an immediate stop to all crane motions, including slewing, hoisting, and luffing?

All motions are stopped by the action of the slewing platform limit switches.

All motions are stopped by the loss of electric power to the crane.

All motions are stopped by the action of the boom maximum outreach and minimum outreach limit switches.

All motions are stopped by the action of the safe working load cutout switch or the slack wire limit switch.

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Question 1 / 205eccef9cbacbc34ba4d45af7

Question 1 of 205eccef9cbacbc34ba4d45af7

For an electro-hydraulic cargo-handling pedestal-type deck crane, what event would result in an immediate stop to all crane motions, including slewing, hoisting, and luffing?

Back

Question 1 of 20

5eccef9cbacbc34ba4d45af7

For an electro-hydraulic cargo-handling pedestal-type deck crane, what event would result in an immediate stop to all crane motions, including slewing, hoisting, and luffing?

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?

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