As it pertains to the luffing motion limits...

Question 1 / 205eccef9cbacbc34ba4d45af5

Question 1 of 205eccef9cbacbc34ba4d45af5

As it pertains to the luffing motion limits associated with an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?

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Question 1 of 20

5eccef9cbacbc34ba4d45af5

As it pertains to the luffing motion limits associated with an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?

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🔍 Key Concepts

• Luffing motion limits on pedestal-type deck cranes and what they protect against • Difference between boom position limits and hoist block travel limits • How an electro-hydraulic system safely stops motion: pump stroke vs. winch brake

💭 Think About

• First decide: are luffing motion limits concerned with the BOOM angle or with the HOIST BLOCK position relative to the boom? Eliminate the choices that refer to the wrong component. • Think about fail-safe design: at a maximum or minimum permitted position, should the system automatically REMOVE power and APPLY a brake, or ADD power and RELEASE a brake? Which choices match that philosophy? • Separate in your mind: one set of limits protects against over-luffing the boom; another protects against two-blocking the hoist block. Which set are you being asked about here?

✅ Before You Answer

• Verify which options talk about the boom raised/lowered (luffing) versus the hoist block raised (hoisting) and match that to the question wording. • For each remaining option, check whether it has the luffing pump stroked to zero (no hydraulic flow) and the winch brake set (motion stopped) at the limit position. • Confirm that you select the statement that both matches luffing motion limits (not hoist limits) AND describes a fail-safe stop condition for the boom.

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Question 1 of 20

As it pertains to the luffing motion limits associated with an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?

When the boom is raised to a maximum permissible height or lowered to a minimum permissible height, the luffing pump shall be stroked to zero and the luffing winch brake set.

When the boom is raised to a maximum permissible height or lowered to a minimum permissible height, the luffing pump shall be placed on stroke and the luffing winch brake released.

When the hoist block is raised to a maximum permissible height with respect to the boom, the luffing pump shall be placed on stroke and the luffing winch brake released.

When the hoist block is raised to a maximum permissible height with respect to the boom, the luffing pump shall be stroked to zero and the luffing winch brake set.

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Question 1 / 205eccef9cbacbc34ba4d45af5

Question 1 of 205eccef9cbacbc34ba4d45af5

As it pertains to the luffing motion limits associated with an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?

Back

Question 1 of 20

5eccef9cbacbc34ba4d45af5

As it pertains to the luffing motion limits associated with an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?

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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— No credit card needed