Assignment 3
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School
Concordia University *
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Course
305
Subject
Mechanical Engineering
Date
Jan 9, 2024
Type
docx
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6
Uploaded by CaptainMongoosePerson936
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
6
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