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LEEA Foundation Certificate - Measurement Units
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LEEA Foundation Certificate - Measurement Units

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Questions and Answers

What is the generally accepted unit for marking a Safe Working Load (SWL) that is less than one tonne?

  • Metric Tons
  • Kilograms (correct)
  • Pounds
  • Stone
  • Which of the following is NOT typically one of the measurement conversions mentioned?

  • 1 tonne = 2204.62lbs
  • 1 foot = 10 inches (correct)
  • 1kg = 2.2lbs
  • 1 inch = 25.4mm
  • What type of documentation is referred to as the 'birth certificate' for new equipment?

  • Safety compliance certificate
  • Proof load testing report
  • Maintenance record
  • Conformity documentation (correct)
  • Which method of verification might be deemed unnecessary for certain assembled items?

    <p>Proof load testing</p> Signup and view all the answers

    Who determines the verification methods used once equipment is in service?

    <p>The Competent Person</p> Signup and view all the answers

    Which of the following materials is considered unsuitable for proof load testing?

    <p>Textile slings</p> Signup and view all the answers

    What is the conversion factor from pounds to kilograms?

    <p>1 lb = 0.45kg</p> Signup and view all the answers

    Which statement about verification and equipment safety is accurate?

    <p>Verification must comply with health and safety requirements.</p> Signup and view all the answers

    Which method is the most commonly used hardness testing method in the lifting equipment industry?

    <p>Brinell</p> Signup and view all the answers

    What does the Charpy impact test measure?

    <p>Energy absorbed during fracture</p> Signup and view all the answers

    In which test is the specimen supported at both ends and struck by a pendulum?

    <p>Charpy impact test</p> Signup and view all the answers

    Which of the following statements about the Izod impact test is true?

    <p>Notches are used to ensure initial failure upon impact.</p> Signup and view all the answers

    What is the primary purpose of the bend test?

    <p>To qualitatively assess the ductility through deformation.</p> Signup and view all the answers

    How many specimens are typically tested during the Charpy impact test at any given temperature?

    <p>3</p> Signup and view all the answers

    What is identified as a key property when measuring notch toughness through impact testing?

    <p>Energy absorption capability</p> Signup and view all the answers

    Which of the following methods is characterized by a materials specimen being notched and held vertically?

    <p>Izod impact test</p> Signup and view all the answers

    What assumption is made about the slinging factor for endless chain and wire rope slings?

    <p>It assumes a choke hitch.</p> Signup and view all the answers

    What is a key characteristic of wire rope slings compared to chain slings?

    <p>Wire rope slings are more susceptible to damage.</p> Signup and view all the answers

    What type of construction for wires in a sling is generally recommended?

    <p>Ordinary lay with a fiber core.</p> Signup and view all the answers

    What is the purpose of using thimbles in the construction of wire rope slings?

    <p>To protect the eye from abrasion and point loading.</p> Signup and view all the answers

    In what scenario are the ratings of lifting accessories particularly critical?

    <p>When using accessories with multiple legs.</p> Signup and view all the answers

    Which factor is critical in ensuring the safety of wire rope slings?

    <p>The minimum breaking load of the rope.</p> Signup and view all the answers

    What type of slings are commonly found in the offshore industry?

    <p>Five leg wire rope slings.</p> Signup and view all the answers

    What is a potential risk when using slings for lifting?

    <p>Bending slings around loads with small radii.</p> Signup and view all the answers

    What is the purpose of the aluminium ferrule in the eye formation of a rope?

    <p>To secure the eye by flowing into the rope formation</p> Signup and view all the answers

    What is the maximum length that the tail should protrude through the ferrule when using square-cut ferrules?

    <p>Half of the rope diameter</p> Signup and view all the answers

    If a rope has been cut by a heat process, what is the recommended maximum protrusion of the tail from the ferrule?

    <p>Equal to the rope diameter</p> Signup and view all the answers

    What is essential to do when using tapered ferrules?

    <p>Follow the ferrule manufacturer’s instructions</p> Signup and view all the answers

    In the Flemish eye method, what shape is formed by unraveling three strands?

    <p>Y formation</p> Signup and view all the answers

    What should be ensured about the strands during the Flemish eye formation?

    <p>They should still lay together as they had in the rope</p> Signup and view all the answers

    What defines a homogeneous joint when using an aluminium ferrule?

    <p>The ferrule flowing into the rope formation under pressure</p> Signup and view all the answers

    What should be visible through the small view hole in a tapered ferrule?

    <p>The tail end of the rope</p> Signup and view all the answers

    What is the minimum peripheral length of a soft eye in relation to the rope lay length?

    <p>Four times the rope lay length</p> Signup and view all the answers

    Which of the following statements about hand-spliced eyes is true?

    <p>The method involves threading individual strands back in a prescribed pattern.</p> Signup and view all the answers

    Why are clamp-type grips, known as 'bulldog' grips, not recommended for making slings?

    <p>They do not provide a consistent level of safety.</p> Signup and view all the answers

    What type of splice should not be used for lifting purposes?

    <p>Splices made with the lay of the rope.</p> Signup and view all the answers

    What is the primary purpose of a stirrup thimble?

    <p>To protect the rope from damage in choked situations.</p> Signup and view all the answers

    What happens to wire rope when the tucks are made against the lay of the rope?

    <p>It tends to untwist, posing a safety risk.</p> Signup and view all the answers

    In the eye formation process, what role does the ferrule play?

    <p>It secures strands and grips the rope.</p> Signup and view all the answers

    Why is it difficult to fit thimbles when making Flemish eyes?

    <p>The design of Flemish eyes complicates the process.</p> Signup and view all the answers

    Study Notes

    Weight Conversions

    • 1 kg equals 2.2 lbs, facilitating understanding between metric and imperial systems.
    • Measurements commonly used for Safe Working Load (SWL) include tonnes (t) and kilograms (kg), or their imperial counterparts, Tons (T) and pounds (lb).
    • SWL under one tonne is typically marked in kilograms or pounds.

    Verification of Equipment

    • New equipment must meet health and safety legislation and product standards, backed by conformity documentation, often referred to as the ‘birth certificate’.
    • Verification methods vary based on standards; certain materials, like textile slings, may not undergo proof load testing.
    • Manufacturers may utilize their verification methods; however, post-installation, a Competent Person assesses fitness for purpose.

    Hardness Testing

    • Hardness of lifting equipment is verified through indentations post-heat treatment.
    • Common testing methods include Vickers, Brinell, and Rockwell; Brinell is prevalent in lifting equipment.

    Impact Testing

    • Impact tests assess a material's energy absorption during fracture, crucial for understanding shock loading response.
    • Two primary methods include:
      • Charpy test: Measures energy absorbed by a notched specimen; results reflect material’s notch toughness.
      • Izod test: Similar to Charpy but holds the specimen vertically in a vice, identifying needed kinetic energy to initiate and propagate fracture.

    Bend Test

    • A qualitative bend test deforms material at its midpoint, ranking its strength.

    Sling Ratings and Types

    • Endless slings have limited uses; ratings are based on choking hitches and straight pulls.
    • Ratings assume that attachment points do not damage slings and account for bending around itself.

    Wire Rope Slings

    • Wire rope slings are commonly used but can be prone to damage.
    • The construction must ensure adequate flexibility and a minimum breaking load for calculating SWL.
    • Two main types of thimbles protect sling eyes from abrasion and point loading, typically made using aluminum ferrules.

    Eye Formation Techniques

    • Ferrule Secured Eyes: Eye formation with ferrules requires careful positioning to ensure the rope is fully engaged.
    • Tapered Ferrules: The tail end stays within the ferrule, necessitating adherence to manufacturer instructions.
    • Flemish Eye: Complex eye formation involves unraveling strands into a ‘Y’ shape and distributing them before securing with a ferrule.
    • Hand Spliced Eyes: Traditional eye formation using specific threading patterns; requires five tucks for safety.

    Temporary Eyes

    • Bulldog grips used for making temporary eyes are not recommended for slings due to inconsistent safety levels.
    • Sockets and fork ends are alternatives, often implemented by compression or bonding processes.

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    Description

    This quiz focuses on the conversion between metric and imperial units, specifically related to the LEEA Foundation Certificate (Global). You will practice converting weights and lengths, which are essential skills for professionals dealing with equipment specifications. Test your knowledge of these essential metric and imperial unit conversions.

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