Assignment 3

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Concordia University *

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305

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Mechanical Engineering

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Jan 9, 2024

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6

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Assignment #3 25 marks Answer the following questions. the assignment is due on Thursday, Dec 7 th /2023 WHMIS ( 5 marks) What responsibilities do workers have under WHMIS? List 2 1. Participating in the WHMIS education and training programs provided by their employer. 2. Take necessary steps to protect themselves and their co-workers and participate in identifying and controlling hazards. How many categories does an SDS have? - SDS have 4 categories divided into sixteen sections . What information is on the Supplier label? List 3 1. Product identifier – the brand name, chemical name, common name, generic name or trade name of the hazardous product. 2. Pictogram (s) – hazard symbol within a red. 3. Initial supplier identifier – the name, address and telephone number of either the Canadian manufacturer or the Canadian importer*. - You are preparing to work with a new hazardous material. You need to know what personal protective equipment to wear. Where would find that? List 3 1. Canada.ca: This website provides a quick facts sheet on PPE, including information on selecting, using, and maintaining PPE, as well as training requirements for employees. 2. CCOHS: The Canadian Centre for Occupational Health and Safety provides information on designing an effective PPE program, including examples of PPE such as respirators, gloves, aprons, fall protection, and full body suits, as well as head, eye, and foot protection. 3. NIOSH: The National Institute for Occupational Safety and Health provides information on PPE, including respirators, eye protection, hearing protection, and protective clothing. 1
How can hazardous materials enter the body? List 3 1. Ingestion: Inadvertently swallowing hazardous materials. 2. Inhalation: Breathing in hazardous fumes. 3. Absorption: Occurs when hazardous material enters the body through the skin or an open wound. Noise (5 marks) There are three machine noise sources in a department. Machine A 118 dBa Machine B 118 dBa Machine C 118 dBa The supervisor provided ear plugs with NRR 32. Numerical differences Levels Amount to be added 0 – 1 3 2 – 4 2 5– 9 1 >10 0 Answer the following questions using the information provided (show all calculations) 1) Is the ear plug effective to work for 8 hours? Why? a) Yes, the ear plug will not be safe or effected to work because the effective noise reduction provided by the ear plugs is 23 dBa. According to OSHA, hearing protection is required for all employees at exposure to 85 or more decibels of sound over an 8-hour period. Since the noise levels of the machines are 118 dBa, the effective noise reduction provided by the ear plugs is 23 dBa, and the maximum exposure limit is 85 dBa, the ear plugs are effective to work for 8 hours. Therefore, the ear plugs provided by the supervisor are effective to work for 8 hours. 2) After using the ear plug, the worker can work for? (maximum time) 2
b) The maximum time a worker can work after using the ear plugs is approximately 7.74 minutes. 3) After using the ear plug, If the worker is standing 2 meters away from machines, what will be the distance that will allow the worker to work for 8 hours? c) The distance that will allow the worker to work for 8 hours is approximately 1584.89 meters. For the following photo describe the followings: (5 marks) Describe the hazard, what is wrong? SAFETY HAZARD and the man is not following proper safety protocols, which is putting him at risk of injury as he is wearing gloves and wearing full sleeves shirt or not rolled up. To prevent accidents, it is important to follow safety guidelines when working with machine. 1. Always wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and hearing protection. What would be the engineering control to prevent this accident? 1. Installing safety guards and shields to prevent access to moving parts and machine guards and local exhaust ventilation. 2. Installing emergency stop buttons and other safety devices to shut down the machine in case of an emergency. Mention one advantage and disadvantage of the control you choose. 3
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1. One advantage of installing safety guards and shields is that they provide a physical barrier between the worker and the moving parts of the machine, reducing the risk of injury. This control method is also relatively easy to implement and can be used with a wide range of machines. One disadvantage of this control method is that it may not be effective in all situations. 2. Emergency stop buttons and other safety devices can be effective in quickly shutting down the machine in case of an emergency, reducing the risk of injury. This control method is also relatively easy to implement and can be used with a wide range of machines. One disadvantage of this control method is that it may not be effective in all situations. For example, if the worker is not able to reach the emergency stop button in time, or if the machine is not designed to shut down quickly, the risk of injury may still be high. List three potential injuries associated with electricity (1.5 marks) - Electrocution can cause death or serious injury, while electric shock can interfere with the normal electrical signals between the brain and our muscles, leading to heart failure, breathing difficulties, or muscle spasms. - Burns can be both disabling and disfiguring and can result from heat generated by an electric arc, or from materials that catch on fire from heating or ignition by electrical currents or an electric arc flash. - Falls can occur when a person is thrown from a height due to an electrical explosion or shock. Mention 4 of the “Fatal Five related to LOTO (2 marks) - Failure to stop equipment: Some workers value productivity above all else, which can lead to the same, possibly deadly. - Failure to disconnect from the power source: In the case of electrical equipment, some workers feel that simply operating the on/off switch is all it takes to be safe. They discount that the switch may be defective or that power may find its way through a short circuit or other source—until they are shocked to learn that it can. 4
- Failure to dissipate (bleed, neutralize) residual energy: Ask workers why TV sets carry a warning about trying to open the case even if the device is disconnected. You know, and they should, that it’s because many electrical devices store power in a capacitor or battery. - Accidental restarting of equipment: This can happen when someone forgets to remove a lockout/tagout device or when someone else assumes that the equipment is safe to use. Factors affecting Electric shock ( mention 3) (1.5 marks) 1- The source of the shock, such as lightning, power lines, electrical sockets, or faulty appliances. 2- The voltage level and frequency of the current. 3- The amount and duration of the current passing through the body. True or false (5 marks) True Ringing in the ears is one of the symptoms of exposure to loud sounds True Impulse or impact noise is a very short burst of loud noise which lasts for less than one second True Hand-arm vibration can cause damage blood vessels and nerves in your fingers and hands True Job rotation is an effective way to reduce harm from Vibration True Whole body vibration could contribute to a number of circulatory, bowel, or respiratory disorders. False WHMIS stands for Workplace Hazardous Materials Information System False Office workers do not require WHMIS training False For LOTO, the key for the lock must be kept with the supervisor False Electrical burns are the result of heat generated by the flow of electric current through the body False The Goal when exposed to loud sound is 80 dBl for 8 hours 5
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