The document discusses preparing a hazard evaluation worksheet for an electrical machine lab. It identifies several hazards in different categories like mechanical, electrical, radiation, work activity, work environment hazards. For each hazard, it lists the source, those affected, likelihood and consequences to determine the risk level. It then proposes actions to minimize the risks and make the workplace safer. The objective is to systematically evaluate risks and prioritize decisions to reduce risks.

1. Preparation of Hazard
Evaluation Worksheet
(task based) for an
Electrical Machine Lab

2. SUBMITTED TO
MD. ARIFUL ISLAM
ASSOCIATE PROFESSOR
DEPARTMENT OF INDUSTRIAL &
PRODUCTION
ENGINEERING, RUET.
NUSRATH ZAHAN
LECTURER
DEPARTMENT OF INDUSTRIAL &
PRODUCTION
ENGINEERING, RUET
SUBMITTED BY
RIFAT ANWAR [1605032]
MD RASHEDUL ALAM [1605033]
MAIDUL ISLAM SAKIB [1605034]
SOHAG MIA [1605035]
FARIHA NAWSHIN ZAMAN [1605036]
MD ABU JAFOR BIN SHAD [1605037]

3. TABLE OF CONTENTS
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• Introduction
• Objective
• Methodology
• Risk and Risk Matrix
• Qualitative Measure of Likelihood
• Qualitative Measure of Consequences
• Task Based Hazard Evaluation Worksheet
• Discussion
• Conclusion

4. INTRODUCTION
A hazard analysis is one of the most important elements of the safety management
program. A hazard analysis is an organized and systematic effort to identify and analyse
the significance of potential hazards in the workplace. This analysis provides information
that will assist students and teachers in making decisions for improving safety and
reducing the consequences of unwanted or unplanned hazardous situations. The hazard
analysis should focus on equipment, instrumentation, utilities, human actions (Routine and
no routine), and external factors that might impact the process. These considerations
assist in determining the hazards and potential failure points or failure modes in a process.
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5. OBJECTIVE
To identify hazards and evaluate risks in a structured and systematic way in
order to prioritize decisions to reduce risk to a tolerable level for an electrical
machine lab.
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6. METHODOLOGY
 Identify potential hazards in the electrical machine lab using the hazard
evaluation checklist.
 Evaluating risk by using a risk calculator.
 Decide corrective actions.
 Preparing the task-based Hazard Evaluation Worksheet.
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7. RISK AND RISK MATRIX
A risk is the amount of harm that can be expected to occur during a given time due
to specific harmful events. A Risk Matrix is a matrix that is used during risk
assessment to define the various levels of risk as the product of the harm probability
categories and harm severity categories. The hazards are categorized into several
groups based on their ranking. They are-
 Catastrophic: range from 16 to 25 marked with red colour
 Unacceptable: range from 13 to 15 marked with Orange colour
 Undesirable: range from 7 to 12 marked with Yellow colour
 Acceptable: range from 4 to 6 marked with Light green colour
 Desirable: range from 1 to 3 marked with Green colour
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8. RISK RANKING MATRIX
Consequence RISK RANKING
MATRIX
CATASTROPHIC 5 10 15 20 25
SIGNIFICANT 4 8 12 16 20
MODERATE 3 6 9 12 15
LOW 2 4 6 8 10
NEGLIGIBLE 1 2 3 4 5
LIKELIHOOD IMPROBABLE REMOTE OCCASIONAL POSSIBLE FREQUENT
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9. QUALITATIVE MEASURE OF
LIKELIHOOD
FREQUENT
 It is expected to occur in most circumstances
 There is a strong likelihood of hazards recurring
POSSIBLE  Consider that it is likely that the hazard could and might occur sometime
OCCASIONAL  Similar hazards have been recorded on an occasional basis but not frequent
REMOTE
 Very few known incidents of occurrence
 Remote chance, but it could occur sometime
IMPROBABLE
 No known or recorded incidents of occurrence
 May only occur in an exceptional circumstance
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10. QUALITATIVE MEASURE OF
CONSEQUENCES
NEGLIGIBLE
 Very minor physical harm of any harm in the workplace. Can be
fixed with alternatives measures without disturbance
LOW
 First aid treatment, on-site release immediately, medium financial
loss
MODERATE
 Medical treatment required, the on-site release contained with
outside assistance, high financial loss
SIGNIFICANT
 Major injuries, major financial losses and the workplace needed to
shut down on a temporal basis
CATASTROPHIC
 Multiple or single death and huge financial losses
 Workplace need to shut down for a sufficient amount of time
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11. Task-based Hazard
Evaluation Worksheet
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12. MECHANICAL HAZARD
Types of Hazards Source
Task Involved
(Who is affected
and when?)
Group Action
Colour with
Rankings
Shearing Belt
Operators are
while working close to
the machine
(Moderate-
occasional)
Undesirable
Provide a means of
immobilizing the drive
mechanism
9
Enlargement Pulley Motor
Machines are
during operation
(Low- remote)
Acceptable
Ensuring machine
setting and adjusting
the system
4
Stabbing/Puncture Wire
Operators are
due to poor handling
(Low- frequent)
Undesirable
Prevent by using
gloves 10
Impact Belt
Entering or placing
body part near the
danger zone
(Moderate
occasional)
Undesirable
Use fix guard prevent
access to moving
machine part
9
Friction Conveyor and
Machine tool and job
are affected
(Significant
Frequent)
Unacceptable
Using the materials
which have smooth
characteristics
15
Falling Object
Register Ammeter,
Voltmeter,
Operators can be
affected due to poor
way of handling
(Possible- moderate)
Undesirable
Carefully hold the
object while
performing an
operation
12
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13. ELECTRIC HAZARD
Types of Hazards Source
Task Involved
(Who is affected
and when?)
Group Action
Colour with
Rankings
Direct Contact Electric Circuit
Operators can be
affected due to less
knowledge of the
electrical circuit
(Significant Frequent)
Catastrophic
Non-conductive gloves
and shoes 20
Indirect Contact
Electric Socket,
Exposed Wire
Users can face harmful
situations due to faulty
electrical system
(Moderate- Possible)
Undesirable
Action needed.
of the room is a must
and a safety socket
be used
12
Electrostatic Phenomena Induction Motor
Operators can be
affected
(Negligible-Frequent)
Acceptable
ESD-safe apparel. ESD-
safe Gloves 5
Short circuit Circuit Board
User may be affected
for accidental
attachment of hot wire
and the conductive
object
(Moderate-
occasional)
Undesirable
Renewing the lab with
new and fine resistant
wire
9
Source of ignition
Manual Circuit
Breaker
Users may be affected
(Low- Improbable)
Desirable
Redesigning 2
Other Electrical
High Voltage Power
Source
Workers may be
affected as well as it
damage the electrical
equipment
(Low occasional)
Acceptable
Separate voltage and
electric source with
stabilizer
6
13

14. RADIATION HAZARD
Types of Hazards Source
Task Involved
(Who is affected
and when?)
Group Action
Colour with
Rankings
Electro-Magnetic
Effects
Generator
Operating this for a
long period may
cause health
(Occasional-
negligible) Desirable
Proper design of all
equipment to
minimize emissions or
making the
less vulnerable to
external interference
3
14

15. WORK ACTIVITY
Types of Hazards Source
Task Involved
(Who is affected
and when?)
Group Action
Colour with
Rankings
Highly Repetitive action
Take the same value
numerous time
Students can be
affected due to
repetitive work also it
can be time-
consuming.
(Negligible-
improbable)
Desirable
Using measuring
apparatus which gives
more accurate results
1
Stressful posture
Inappropriate sitting
arrangement
Students can be
affected with postural
pain
(Negligible frequent)
Acceptable
Proper sitting
arrangement 5
Handling heavy items Transformer
Users can be faced
trouble while moving
(Negligible-
Frequent)
Acceptable
Using trolley to move
heavy equipment 5
Visual Fatigue
Taking a reading
from voltmeter and
ammeter
Operators can be
affected
(Low occasional)
Acceptable
Using digital ammeter
or voltmeter 6
Poor workplace design
Inappropriate
lighting condition,
air ventilation,
improper layout
Workers can face
problems working on
less lighting
arrangement
(Occasional
Negligible)
Desirable
Sufficient lighting
system and
redesigning proper
layout system
3
15

16. WORK ENVIRONMENT HAZARD
Types of Hazards Source
Task Involved
(Who is affected
and when?)
Group Action
Colour
with
Rankings
Significant noise Motor, generator
Hearing problems
can cause to
workers after
working long hours
(Low possible)
Undesirable
Using noise-
cancelling
headphone
8
Significant vibration Motor generator
Operators can be
affected
(Negligible
Occasional)
Desirable
Implementation of
Vibration absorbing
system
3
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17. DISCUSSION
In this study, at first, we find out the hazards which are mostly possible to
occur in our electrical machine lab. Then, we sorted out the source of each
hazard and located the affected area by occurring this hazard. After that, we
listed the hazards according to their types and ranked the listed hazards
concerning their possibilities to occur and how much injurious that. And
finally, we took action to minimize the hazards and keep the workplace
remain safer than before
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18. CONCLUSION
Firstly, emergency preparedness and maintaining a safe workplace is
defining and analysing hazards. Hazard identification can be used to
establish priorities so that the most dangerous situations are addressed and
take a step to minimize that. Proper equipment and procedures are used to
minimize the hazards. Regular inspections also can minimize the possibilities
of occurring hazards in respected areas.
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19. THANK YOU
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