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Electrical (Period 1 Electrician) > Electrical Safety Mod 1-4 > Flashcards

Electrical Safety Mod 1-4 Flashcards

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1
Q

What are the 2 main forms of Electrical Hazards?

A

Arc flash
Electric shock

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2
Q

Which CSA standard is used for electrical safety in the workplace?

A

CSA z462

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3
Q

What is the safest risk control method for electrical hazards?

A

de-energize if and when possible

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4
Q

What is the pyramid of risk control methods from safest to least safe?

A

Elimination
Substitution
Engineering controls
Administrative controls
PPE

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5
Q

An arc flash can be caused by many things including:

A

Dust or conductive dust in electrical equipment

Dropping tools inside of electrical equipment

Accidental contact with electrical equipment

Material failure

Corrosion

Faulty installation

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6
Q

What is an arc flash boundary?

A

The distance from an an Arc Flash at which a person may be exposed to incident energy. Incident energy can cause onset of second-degree burn on unprotected skin.

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7
Q

What identifies as a qualified person?

A

A person who has the skills and knowledge related to the construction and operation of electrical equipment and installations. They have received sufficient training to recognize and avoid the hazards involved.

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8
Q

What is an arc duration?

A

The total time it takes the system over current protective devices to detect and interrupt a current fault.

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9
Q

What is incident energy?

A

The amount of thermal incident energy to which a worker’s face and chest could be exposed at the working distance during an arc flash incident.

It is measured in joules per centimeter squared or calories per centimeter squared

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10
Q

What current level in milliamps would you be experiencing a painful shock and the inability to let go?

A

15 to 20

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11
Q

What are three factors that determine the severity of an arc flash injury?

A

Working distance, amount of arcing that occurs, time it takes for upstream electrical protective device to open.

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12
Q

What are the three main purposes of an arc flash risk assessment?

A

Identifying the arc flash
Likelyhood of occurrence
Additional protection required?

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13
Q

What are some effects that workers may experience when exposed to an arc flash?

A

Flying objects
Heat up to 20,000°c or more
Sound blast of over 168 DB
Toxic vapors
Immense light

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14
Q

What are the five steps for emergency action?

A
  1. Safely remove the victim from the source of shock
  2. Prevent further injury
  3. Send for qualified help
  4. Eliminate the danger
  5. Report the accident
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15
Q

How much current causes ventricular fibrillation of the heart?

A

100 to 200 mA

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16
Q

What term is used to describe the long-term symptoms of electrical shock?

A

Sequelae

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17
Q

When working or operating machinery near overhead power lines the safe clearance distance of____meters must be maintained until the voltage of the power line is verified.

A

7

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18
Q

What are the basic PPE required?

A

Arc rated clothing
Hard hat
Eye and face protection
Work boots
Work gloves

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19
Q

What does the acronym atpv stand for?

A

Ark thermal protective valve

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20
Q

Which rubber insulating glove class is rated for the highest voltage?

A

Class rating number four, color orange, rated for 36 kilovolts

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21
Q

What part of Alberta OHS code covers lockout tagout requirements?

A

Part 15

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22
Q

What are the six basic steps for locking out and re-energizing equipment?

A
  1. Warn personnel
  2. Use proper shutdown procedures
  3. Disconnect equipment
  4. Padlock
  5. Confirm de-energized
  6. Re-energized after work is complete
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23
Q

What does the occupational health and safety act establish?

A

The oh&s Act establishes a framework of rules for employers worker suppliers and government agencies that enforce safety standards.

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24
Q

What does the OHS regulation provide?

A

Further clarification and information to sections of the ACT

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25
What does the OHS code provide?
Comprehensive detailed information for employers workers suppliers and government agencies
26
What is the definition of an employer?
A person who is self-employed in an occupation, person who employs one or more workers, person designated by an employer as the employer's representative, or director or officer of a corporation who oversees the occupational health and safety of the workers employed by that corporation
27
What are employee responsibilities according to OHS regulations?
Report any hazardous or potentially hazardous situations to your supervisor Report all injuries immediately Where all required PPE and ensure that it is in good condition Inspect all equipment tools and machinery before use Participate in regularly scheduled work site safety planning meetings Ensure you know and follow emergency procedures Do not perform any work you feel is unsafe
28
True or false The workers compensation board is a government-funded profit-based corporation.
False
29
What are the three elements of fire off and presented in the workplace?
Oxygen, fuel, heat
30
Employers must report accidents to the WCB within how many hours of the incident?
72
31
32
Worksite specific training must cover for areas:
Hazard information, the different modes of product identification used at the workplace, procedures for safe use storage and handling of controlled products, procedures for dealing with fugitive emissions and emergencies
33
What are employee responsibilities?
Participating in training, using information obtained to protect yourself, applying workspace labels and when required, demonstrating the application of safe work procedures with controlled products and the knowledge of why those procedures are required
34
True or false The WCB is provincially legislated and guided by the Alberta workers compensation act
True
35
Is the Alberta construction safety association non-profit based?
Yes
36
Is the construction owners association of Alberta comprised of members who work in heavy industrial construction and industrial maintenance?
Yes
37
Workplace hazards fall into four main categories:
Biological Chemical Ergonomic Physical
38
What are some hazard assessment tools?
Hazard assessment reports Checklists Health and safety plans Emergency response plans First aid records in incident reports
39
According to occupational health and safety what control provides the highest level of worker protection?
Elimination
40
How long are employers expected to retain first aid and incident reports?
3 years
41
The type of first aid equipment required is based on:
How hazard is the work is The time taken to travel from the work site to a healthcare facility The number of workers on each shift
42
What are the first aid requirements for low hazard work at a close work site with 5 to 9 workers at the work site per shift?
One emergency first aider one standard first aider and a number two first aid kit
43
Oh&s classifies a work site as isolated if it is located more than how many minutes from a healthcare facility?
40 minutes
44
With an exposure level of 115 or more decibels what is the permitted duration of work?
Never
45
With an exposure level of 82 decibels what is the duration of permitted work?
16 hours
46
What is an example of air supplying respirators?
Airline respirators hoods helmets and suits as well as self-contained breathing apparatus
47
At what decibel level does hearing protection become mandatory?
115 DB
48
What is a characteristic of protective footwear with a yellow triangle on the outer side or tongue of the right shoe?
Soul puncture protection and grade 2 protective toe to withstand an impact up to 90 joules
49
Which class of industrial safety head were provides the best protection from electrical shock in the addition to impact and penetration resistance?
Class E
50
what ladder material is best for working around electrical equipment.
fibreglass
51
how many meters above do guardrails become mandatory?
3.0m or higher
52
What is a node point on a scaffold?
The intersection of a standard and transom
53
What ratio are outriggers used
3:1
54
What is the biggest rule when lifting heavy objects?
Do not bend your back and reach down
55
what does SWL stand for?
safe work load
56
what are wire rope slings made of?
carbon steel or stainless steel
57
what are load softeners used for?
used as padding on a wood block to prevent / limit the kinking of a sling
58
formula for calculating SWL
SWL= D^2 x 8 D= diameter in inches SWL= Tons safety factor 5:1
59
why do slings have a red core?
to indicate wear and damage
60
What is WLL?
Working Load Limit
61
what do you do if there are signs of damage on a rope sling?
tag it or destroy it before someone can use it?
62
with a 1000lb weight is it optimal, safe, or dangerous to have the weight with two, 90 degree angles
optimal
63
with a 1000lb weight is it optimal, safe, or dangerous to have the weight with two, 60- 45 degree angles
safe
64
with a 1000lb weight is it optimal, safe, or dangerous to have the weight with two, 30 degree angles
dangerous
65
what part of a hook is the loads weight placed on?
rings and links
66
hooks that do not have a safety latch must be:
moused
67
what is a bridle hitch?
connecting 2,3,or 4 hitches for hoisting
68
What are some means of identification for hazardous materials?
WHMIS label Color coding Tags Number coding Letter coding Shapes Labels
69
Gasoline is kept in what color container?
Red
70
It is the suppliers responsibility to update the safety data sheet within ________ days.
90
71
Diesel is kept in what color container?
Yellow
72
In safety requirements for ventilation systems, what are some safety requirements that workers may be exposed to?
A safety hazard may include an atmosphere with less than 19.5% or more than 23% by volume of oxygen
73
What are the three elements of fire?
Fuel, air like oxygen, and ignition or heat
74
Class A fire is made with what kind of combustible material?
Wood and paper
75
Class B fire is caused by what combustible materials?
Flammable liquids
76
Class D fire is caused by what combustible material?
Combustible metal
77
Class k fire is caused by what combustible material?
Cooking media like oil or fat
78
Class A fires can be extinguished by:
Water or water solutions
79
Class B fire can be extinguished by:
Smothering with dry chemical or foam
80
Class c fires can be extinguished by:
Dry chemical or carbon dioxide
81
Class D fire can be extinguished by:
Fire extinguisher that does not react with burning metal. Nothing with water or oxygen
82
Class k fires can be extinguished by:
Wet chemical like potassium acetate base

Electrical (Period 1 Electrician) (13 decks)

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