B Flashcards
When locking out equipment
must consider all sources of hazardous energy
Sources of hazardous energy
Gravity Steam Hydraulic Pneumatic
Other sources of hazards
Toxic gases, Hydrogen sulphide, carbon monoxide, ammonia, cyanide Methane, natural gas, propane, hydrogen and cleaning solvents
UEL
upper explosive limit
LEL
lower explosive limit
The LEL is used for
setting the parameters of alarm levels for gas monitoring systems
Who is authorized to do lockouts
someone who has been trained and know the lockout procedures for that equipment to initiate a lockout must be well trained and authorized an apprentice can lock out a piece of equipment only if the lockout is already initiated.
WCB regulations and lockout
use your own locks and keys do not borrow another person’s lock remove your own lock must not remove someone else’s lock if you apply the first lock, you must ensure that the machinery cannot be operated a senor supervisor may remove someone’s elses lock but only after every effort to contact the person
How to operate a disconnect switch
stand to the side and look away
Removing the lockout
make sure that the equipment can be operated safely make sure that all workers are clear
Guardrails
40 to 44 inches above the work surface consist of a top rail, mid rail, and toe board resist a 125 lb. horizontal load uprights at a max spacing or 8 to 10 feet 2 by 4 top rail for uprights at 8’ centres 2 by 6 top rail for uprights at 10’ centres
Fall restraint system
designed to prevent workers from accessing and edge where they could fall
Fall arrest
will limit the free fall of a worker to 4’ full body harness, lanyard, lifeline
Vertical lifelines
CSA approved 6000 lb break strength Have only one worker attached to it.
Horizontal lifelines
provide 800 lb. or support for each worker attached to the line break strength of at least 20 000 lb. 1/2 diameter wire rope max of three workers attached to it.
Fall protection equipment
must be inspected by a qualified person kept dry and maintained in good working order.
Safety meetings
focused to the site and work conditions take place on the site clear objectives Hazards should be pinpointed key points should be demonstrated using real tools
Housekeeping
Do no block exits Keep floors and work areas clean and dry Keep steps and ladders in serviceable condition Keep emergency equipment clean and unobstructed
Oxygen deficiency
defined as air with less than 19.5%
Fire triangle
Fuel, oxygen, heat
Classes of fires
Class A (Green) Class B (Red) Class C (Blue)
Class A (Green)
wood, cloth, paper, rubber
Class B (Red)
involve flammable liquids
Class C (Blue)
involve energized electrical equipment
Extinguishers for Class B and C fires
dry chemical and carbon dioxide
Current Range
non-lethal 1mA to 50mA Lethal 50mA to 200mA
What does WHMIS mean
Workplace Hazardous Materials Information Systems
Purpose of WHMIS
to give all working Canadians a uniform and appropriate quantity and quality of information about hazardous materials used in the workplace
MSDS (material safety data sheet)
provides information on potential hazards, precautions and emergency measures about a controlled product: minimum requirments Nine content sections must be filled out No section may be left blank Data sheets cannot be more than three years old All hazardous ingredients must be disclosed available in both official languages A copy of the current MSDS must be sent to the purchaser on or before the date of sale of the first purchase of a controlled product
Labelling
all containers containing controlled products used in a workplace must be properly labelled.
Worker education
training must include how WHMIS works harzards of controlled products procedures for safe storage, use and disposal emergency procedures
Supplier labels
must include product identification WHMIS hazards symbols Risk phrases precautionary statements first aid measures statement advising that an MSDS is available manufacturer and supplier
Workplace labels
the product names safe handling information reference to MSDS
MSDSs must contain nine categories
Section 1, Hazardous Ingredients Section 2, Preparation Information Section 3, Product information Section 4, Physical Data Section 5, Fire or Explosion Hazard Section 6, Reactivity Data Section 7, Toxicological Properties Section 8, Preventive Measures Section 9, First Aid Measures
Class A: Compressed Gas
Class B: Flammable and Combustible Material
Class C: Oxidizing Material
Class D: Poisonous and Infectious Materials
Class D, Dvision 2: Poisonous and Infectious Materials - other Toxic Effects
Class D, Division 3: Poisonous and Infectious Materials - Biohazardous Infectious Material
Class E: Corrosive Material
Class F: Dangerously Reactive Material
