Job Safety Analysis Overview

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Questions and Answers

What are common natural fibres used to produce fibre rope slings?

Nylon, polyester, and polypropylene

Silk, wool, and cotton

Linen, bamboo, and jute

Manila, hemp, and sisal (correct)

What manufacturing applications utilize nylon compounds?

Manufacturing wear seals and oil seals (correct)

Construction materials and concrete

Textile production and apparel

Electrical insulation and wiring

What is the primary purpose of heat treatment in metals?

To increase weight for stability

To improve conductivity

To enhance aesthetic qualities

To change microstructure and mechanical properties (correct)

Why have fibre rope slings declined in use compared to other textile slings?

Newer forms of textile slings are more effective Signup and view all the answers

Which process typically follows after the production of fibre rope slings?

Hand splicing Signup and view all the answers

What are the components typically combined with nylon in seal manufacturing?

Latex and rubber Signup and view all the answers

What does the 'birth certificate' represent in the context of new equipment verification?

The conformity documentation combined with verification results Signup and view all the answers

Which type of equipment is generally unsuitable for proof load testing?

Textile slings Signup and view all the answers

What primarily influences the verification methods used by manufacturers for new equipment?

The applicable legislation and product standards in use Signup and view all the answers

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

The Competent Person Signup and view all the answers

Which of the following statements about the verification of equipment is true?

Some equipment requires no additional tests if components are verified to their own standards. Signup and view all the answers

What is the primary purpose of conducting a Job Safety Analysis?

To examine potential hazards and implement control measures Signup and view all the answers

Which step involves determining who may be at risk from identified hazards?

Decide Who Might Be Harmed Signup and view all the answers

What is a key requirement for new equipment to be verified?

The equipment must comply with essential health and safety requirements. Signup and view all the answers

What must be done with the findings of the Job Safety Analysis?

Record and implement them Signup and view all the answers

Which step in the risk management approach involves regularly reviewing workplace conditions?

Review Your Findings Signup and view all the answers

Why is it important to identify significant hazards in the workplace?

To ensure proper focus on the risks that could cause harm Signup and view all the answers

What might necessitate a review of findings from a Job Safety Analysis?

Modifications to existing equipment or procedures Signup and view all the answers

What process comes after identifying hazards in a Job Safety Analysis?

Decide Who Might Be Harmed Signup and view all the answers

What is a common feature of a risk management approach as described in the analysis?

It utilizes a 5-step approach Signup and view all the answers

What occurs during the 'necking' phase of a tensile test?

The cross-sectional area becomes smaller. Signup and view all the answers

How does a ductile material behave compared to a brittle material under tensile stress?

It withstands deformation longer before yielding. Signup and view all the answers

What is the significance of reaching the ultimate breaking stress?

It marks a point where stress no longer increases despite load reduction. Signup and view all the answers

What happens to the stress recorded during necking, as the cross-sectional area decreases?

Recorded stress appears to decrease. Signup and view all the answers

In terms of material strength, which statement correctly describes ductile and brittle materials?

Ductile materials yield at lower levels of stress than brittle materials. Signup and view all the answers

What does the necking phenomenon indicate about a material during a tensile test?

The material has reached its maximum load-bearing capacity. Signup and view all the answers

What is the maximum working load limit (WLL) for multi-leg slings with more than two legs in Australia?

Equal to the WLL of a two-leg sling Signup and view all the answers

What is the significance of the included angle between sling legs?

It determines the mode factor for the sling Signup and view all the answers

How is the mode factor calculated for slings?

Using the cosine of the angle to the vertical Signup and view all the answers

If a single leg sling has a WLL of 2t, what is the maximum load that can be lifted with two identical slings at a 0-45° angle?

4t Signup and view all the answers

What limitation is placed on the WLL of a multi-leg sling in Australia?

It is restricted to the WLL of the two-leg sling regardless of legs Signup and view all the answers

At what included angle is the WLL of a two-leg sling rated?

60° Signup and view all the answers

Study Notes

Job Safety Analysis (JSA)

JSA, also known as Job Safety Review, is a fundamental examination of potential workplace hazards to ensure safety measures are adequate.
A comprehensive risk management plan is essential to identify and control all workplace risks.
Commonly relies on a five-step approach for effective hazard management:
- Identify the Hazards: Recognizing significant hazards present in the workplace.
- Decide Who Might Be Harmed and How: Determining affected groups such as staff and visitors in case of incidents.
- Evaluate the Risks and Decide on Precautions: Assessing risks' significance and necessary protective actions.
- Record Your Findings and Implement Them: Documenting significant findings, hazards, risks, and existing precautions.
- Review Your Findings: Ongoing vigilance is required due to constantly changing work conditions and emerging hazards, like stress.

Natural Fibres in Slings

Fibre rope slings, originating from historical lifting equipment, have seen decreased use in favor of modern textile slings.
Commonly used natural fibers for rope slings include manila, hemp, and sisal.
These slings are traditionally made from cut lengths of rope, which are hand spliced.

Heat Treatment of Metals

Heat treatment modifies metals' microstructure through heating and cooling processes to tailor physical and mechanical properties.
A significant decrease in cross-sectional area during testing leads to necking, indicating the maximum load and ultimate breaking stress.
Differences exist between ductile and brittle materials:
- Ductile materials yield at lower stress levels, elongate, and ultimately fracture.
- Brittle materials resist deformation until a high stress level, then fracture abruptly.

Types of Verification for New Equipment

New equipment must meet essential health and safety requirements as per applicable laws and standards.
Verification documentation serves as a 'birth certificate,' confirming compliance and safety.
Proof load testing might not be suitable for certain materials (e.g., textile slings) while components verified to their own standards may not require further testing.
Verification is essential in assessing the fitness for purpose of equipment after deployment.

Working Load Limit (WLL) and Mode Factor

WLL denotes the maximum load a sling can lift; for multi-leg slings in Australia, it's limited to the WLL of a standard two-leg sling.
Mode factor affects the sling's working load limit based on the angle to the vertical during use.
To determine the maximum load of two identical slings at angles between 0-45°, the combined WLL must be calculated based on the mode factor.

Example Calculation

For a single leg sling with a WLL of 2t, using two identical slings together at an included angle of 0-45° would entail calculating the applicable mode factor to find the maximum load capacity of the assembly.

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Description

This quiz explores the concept of Job Safety Analysis (JSA), focusing on the identification of workplace hazards and the implementation of control measures. Participants will learn about the importance of evaluating risks and ensuring safety precautions are in place. Engage with questions that highlight key principles and practices in job safety reviews.