Assignment 3
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Concordia University *
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305
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Mechanical Engineering
Date
Jan 9, 2024
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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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