Safe Working at Heights Theory Assessment Version 4.00 Safe Working at Heights Theory Assessment This Theory Assessment will form part of the formal assessment for the following unit/s of competency: RIIWHS204D Work Safely at Heights. The result of this assessment task will be used as evidence by your assessor for awarding competency. Assessment Conditions Formal assessment conditions are required throughout this assessment. Please do not talk to other candidates, share information or communicate in any way. Failure to observe these requirements may deem you as unsatisfactorily completing this assessment task and will result in you being found not yet competent in the units assessed. This assessment is in the multiple-choice, true or false and short answer format. Please read the question and each of the answers before circling the correct answer. If you make a mistake, cross it out and circle the correct answer. All answers are to be completed on the answer sheet and not on this paper. If you do not understand something about a question please ask your assessor for further explanation. The assessor will explain the question however they will not influence your answer in any way. Once completed please remain seated until all other candidates have completed their assessment. Your instructor will then collect your assessment for marking. The time allocated for this assessment is 45 Minutes You must achieve a result of 80% or correct on your first attempt to successfully complete this assessment. You will then subsequently be required to achieve 100% of the answers correct prior to being assessed as competent.
Chapter 4 Part 4.4 Clause 78 of the Work Health and Safety Regulation states A person conducting a business or undertaking at a workplace must manage, in accordance with Part 3.1, risks to health and safety associated with a fall by a person from one level to another that is Question 1. reasonably likely to cause injury to the person or any other person. Consider the regulation above and circle the activities below that would require fall protection: When working out on the jib of a crane. When cleaning gutters on the first level of a residential house. When working on a platform 1m off the ground on a site where the ground is littered with sharp concrete metal reinforcing bars. All of the above activities would require fall protection of some kind. Part 3.1 of the Work Health and Safety Regulation requires persons to eliminate or minimise Question 2. hazards and their associated risk in the workplace. What general measures below would you put in place when working at heights to comply with this part of the Regulation? Place barricades around the work area to prevent access to unauthorised persons. Place signs indicating that workers are working above. Run out barrier tape to isolate areas where there is a risk of falling debris. All of the above should be standard hazard management procedures prior to starting work. Question 3. By what method would you identify hazards prior to commencing work? By liaising with the property owner, site supervisor or work colleagues. By conducting a risk assessment and completing a SWMS. By conducting a walk around the site looking for additional hazards prior to commencing work. All of the above. The Work Health and Safety Regulation 2011, Chapter 3, Part 3.2, Division 10 requires you to Question 4. manage the risk of falling objects. What method/s could you use to prevent falling objects or tools to comply with this regulation? All tools and equipment should be secured by a lanyard or similar means to prevent falls. A physical barrier should be erected to stop or prevent objects falling from the work site. A safe means of raising and lowering equipment should be used to prevent falling equipment. All of the above should be considered. Question 5. Question 6. Prior to placing tools down whilst working at height you must ensure that: The tool is secured to prevent other workers stealing it. The tools are secured by a lanyard or placed in a position that prevents the tools being accidentally knocked off or dropped from height. Don t ever put your tools down whilst working at heights. You tell someone where you are placing the tool so they can use it if they require. If a worker suffers a fall, your immediate action would be to Notify your supervisor when you finish the immediate task. After all he is not going anywhere. Notify Emergency Services on 000 and immediately commence recovery operations to recover the fallen worker as soon as possible actioning the approved pre designated rescue plan. Don t get involved, it is the responsibility of the emergency services to rescue fallen workers. Reassure the worker until the emergency services arrive to affect a rescue. Theory Assessment Height Safety V 4.2.Docx Page 2 of 7
Question 7. Which attachment point on the harness is suitable for fall arrest? The Confined Space Shoulder loops. The Fall Arrest loops at the front or rear as indicated on the harness. The waistband or pole strap attachment points. Any of the above. Question 8. How often should you check and adjust fall protection? Any time you move or change your work position. Whenever other workers move about or change their position. Any time that you are unsure of the reliability of fall protection. All of the above. Question 9. Once the task is completed how would you descend or leave the work area? In a safe controlled method ensuring that the workers, tools and equipment are protected from falls at all times. Use the quickest method as the job is completed and there are no further risks. All tools and equipment can be thrown down as long as you call out to ensure no one is below. You must have another worker assist you down from heights. Question 10. There is a range of compliance documentation and legislation that addresses the requirements for working at heights. This includes: The Australian Standard AS/NZS 1891.4 Industrial Fall Arrest Systems and Devices The National Code of Practice Managing the Risk of Falls at Workplaces. The Work Health and Safety Regulations 2011. All of the above. Question 11. Weather needs to be considered when working at heights as it can effect the worker and increase the risk of: Falls due to spilling on wet slippery surfaces. Instability of workers and equipment due to high or gusting winds. Lack of concentration due to heat illness or being excessively cold. All of the above are factors affected by the weather that may directly increase the hazards and risk of working at height. Question 12. Who is responsible for the placing of signs and barricades to identify hazards and restrict access? The worker conducting the task. The Police or emergency services. No one, other workers have a responsibility to look out for their own safety. All of the above. Question 13. When should you reassess your risk control measures that you have put in place to control a hazard or reduce the risk associated with a hazard? Anytime the activity, site conditions or work practises change. Never, risk control measures should not be changed until the job is completed. Only when all workers are removed from the work location. At the beginning of each day prior to workers entering the worksite. Theory Assessment Height Safety V 4.2.Docx Page 3 of 7
Question 14. Considering our sling loading angles, what is the maximum safe angle that we would generally look for when setting up an anchor system for fall arrest? I shape or a sling load angle of under 90 0 Y shape or a sling load angle of 120 0 T shape or a sling load angle of 180 0 Question 15. Question 16. Question 17. Question 18. Question 19. At the completion of your work, how would you manage any rubbish? Clear the site of rubbish and dispose of according to type (recyclable and non recyclables). Leave the site without clearing debris as it is the owner s responsibility to remove waste. Locate your rubbish into a corner for someone else to collect later. Any of the above as there are no requirements to manage your own rubbish. How should you store equipment associated with Height Safety? Store in a cool, dry, well-ventilated place out of direct sunlight. In direct sunlight to prevent any mould. In the back shed with the other general household equipment. In the toolbox with other tools used for the job. It s best that equipment is in one place. How would you wash equipment contaminated with dirt or foreign particles? As per manufacturer specifications. Place in the washing machine with a strong commercial detergent. Wash in a solution of Kerosene and Thinners to remove built up grime. Do not wash any height safety equipment ever. It should be replaced only. All single point anchors for single person attachment should be able to support 15kN (1500kg, 1.5 tonnes or a small car). 100kg 200kg or enough to support 2 persons. Twice the weight of the object or person that it is supporting. Who is responsible for safety within the worksite? The company director. The site supervisor. The workers. All persons are responsible for safety. Question 20. Considering the hierarchy of control, what is the preferred method to control a falls risk? Eliminate the hazard and risk. Minimise using ladders, administrative controls and other reasonably practical steps Minimise with work positioning systems. Minimise using a fall arrest system Theory Assessment Height Safety V 4.2.Docx Page 4 of 7
Question 21. If throughout the conduct of an activity you identify a hazard that you cannot assign a control measure to you should immediately. Cease all activity in relation to the hazard and notify the site supervisor. Work is not to recommence in the area until the hazard is dealt with by the appropriate control measures. Continue working being mindful of the hazard. Stop work and immediately leave the site. You can come back another time. All of the above. Question 22. If you are unsure as to the suitability or effectiveness of a selected anchor you should seek professional advice by Contacting a structural or plant engineer. Ask a co-worker what they think. Phone a friend and ask them for advice. All of the above. Question 23. Question 24. If upon inspection you find faults or damage to your equipment you would Withdraw from service and arrange for service/repair. Throw out all damaged equipment regardless of who owns it. Give it to another worker to use who is lighter then you. Don t worry about it. There are many safety factors built in to all equipment. When using a twin access lanyard it is acceptable to back hook the lanyard If the lanyard is too long and therefore poses a falls risk. When you are operating on a platform. You can never, at any time back hook a lanyard. You can only do it when you are supporting a single person. Question 25. When attaching an anchor strap or sling using the choking method the Safe Working Load of the sling is increased decreased remains the same increased or decreased Question 26. When basketing a sling, what happens to both the slings ultimate capacity and safe working load? It doubles It halves It triples It reduces by 70% Question 27. When using a standard lanyard and shock absorber the end of the lanyard with the shock absorber should be attached directly to. The anchor. The workers harness. In the middle of the system. Any of the above. Theory Assessment Height Safety V 4.2.Docx Page 5 of 7
Question 28. Question 29. Question 30. Question 31. Question 32. Question 33. How often should you inspect your harness? Every 6 months only. Every 12 months only. Before and after every use yourself and every 6 months by a competent person. Before and after use yourself and every 12 months by a competent person. Which Fall Protection Category supports the workers weight whilst providing fall protection? An example would be a worker cleaning windows. Fall arrest. Fall restraint. Working positioning. None of the above methods. You are allowed to mark harnesses with a permanent pen It s not a good idea to mark your harness. Only with you name. Only on the chest strap. Only on the leg straps. The maximum force a person can be subjected to in a fall is 10kN or 100 kg 1kN or 100 kg 6kN or 600kg 0.5kN or 50kg When ascending a ladder with a vertical life line what is the maximum allowable distance between the harness attachment point and the lifeline. 60mm 300mm 600mm 30mm The equipment tag below indicates that the Round sling has a working load limit of 2011 tonnes. Is 2 meters in length and has a working load limit of 10 tonnes. Has a working load limit of 2 tonnes and is 2 meters in length. Will break if a load of 2.1 tonnes or more is applied to it. Theory Assessment Height Safety V 4.2.Docx Page 6 of 7
Question 34. A two person anchor is required to be able to support a force of Must be able to support a fall of 16kN. Must be able to support a fall of 31kN. Must be able to support a fall of 12kN. Must be able to support a fall of 21kN. Question 35. What fall clearance required for a worker who is 1.8m tall and is using a 2m Spanset lanyard with a possible shock absorber extension of 2m. (Remember to include the 1m safety margin) A clearance of 8.8m below the anchor would be required with this setup. A clearance of 6.8m below the anchor would be required with this setup. A clearance of 4.8m below the anchor would be required with this setup. A clearance of 7.8m below the anchor would be required with this setup. Question 36. Hooks and Karabiners used for fall protection must be a minimum of how many actions to open. Single action. (One easy action to open them. Eg squeeze to open) Dual action. (Two actions are required to open them. Eg screw or twist and squeeze to open) Triple action. (Three actions are required to open them. Eg lift, twist and squeeze to open) Any amount, there are no recommendations or requirements for this equipment. Question 37. What is the maximum service life of all webbing products and synthetic ropes? 10 years from date of manufacture. 10 years from the date the product was first used. 20 years from the date of manufacture. There is no limitation; as long as it passes the inspections every 6 months you can use it forever. Question 38. If your equipment is subjected to the force of a fall you should immediately remove it from service and have it inspected for serviceability prior to its next use. True False Question 39. Apart from possible discomfort, the weather has no impact on safety of persons working at height. True False Question 40. When using an extension ladder, the ladder should be placed 1 metre out from the wall for every 4 metres that the ladder is raised from the ground. True False Theory Assessment Height Safety V 4.2.Docx Page 7 of 7