120101e Welding Safety Flashcards
Question: What type of light energy causes arc flash (also known as welding flash or arc eye)?
a) Visible light rays
b) Ultraviolet rays
c) Infrared rays
d) Gamma rays
Answer: b) Ultraviolet rays
Question: What is the maximum permitted sound level for an 8-hour day?
a) 85 decibels
b) 88 decibels
c) 90 decibels
d) 95 decibels
Answer: a) 85 decibels
Question: When treating hypothermia, the body temperature of the individual should be raised slowly.
a) True
b) False
Answer: a) True. To treat hypothermia, the body temperature must be raised slowly, warm
liquids without caffeine and medical attention should be given as soon as
possible.
Question: What shade of filter plate should be used when welding, using low to medium amperage with the SMAW process?
a) Shade #6
b) Shade #10
c) Shade #11
d) Shade #12
Answer: b) Shade #10
Question: What type of clothing offers the best protection against sparks and molten slag?
a) Leather
b) Denim
c) Wool
d) Cotton
Answer: a) Leather
Question: What type of respirator should not be used if the atmosphere has been deemed immediately dangerous to life and health?
a) Airline respirator
b) Self-contained breathing apparatus
c) Air purifying respirator
d) Pressure on demand respirator
Answer: c) Air purifying respirator
Question: What material is the major cause of metal fume fever?
a) Stainless steel
b) Zinc
c) Aluminum
d) Cadmium
Answer: b) Zinc
Question: What gas is produced when chlorinated-hydrocarbon degreasers are exposed to ultraviolet light?
a) Argon gas
b) Ethylene dichloride gas
c) Sulphur dioxide gas
d) Phosgene gas
Answer: d) Phosgene gas
Question: What is the maximum allowable exposure to hydrogen sulphide (H2S) gas in an 8-hour period?
a) 10 ppm
b) 50 ppm
c) 100 ppm
d) 1000 ppm
Answer: a) 10 ppm
Question: When a shop is using a general ventilation system, how many changes of air per hour should it provide?
a) 2
b) 4
c) 6
d) 8
Answer: b) 4
Question: What type of smoke extracting system filters and then recirculates the air back into the shop?
a) Portable smoke extractor
b) Local ventilation system
c) General ventilation system
d) Isolation chamber
Answer: a) Portable smoke extractor
Question: Fume extracting welding guns are most often used with the FCAW process.
a) True
b) False
a) True. When welding with the FCAW process, one of the disadvantages is the volume of fumes produced. Using a fume extracting gun helps minimize this hazard.
Question: Power sources should be connected by a qualified electrician to ensure they have been properly grounded.
a) True
b) False
a) True. Having the power source connected by a qualified electrician minimizes the risk of electric shock to the operator.
Question: What should be done to electrically operated equipment prior to repair?
a) Send out an e-mail to alert workers
b) Locked out and warning notices posted
c) Let your direct supervisor know
d) Walk around the shop and verbally tell co-workers
Answer: b) Locked out and warning notices posted
Question: Who has the responsibility of placing the lockout tag on the equipment’s circuit breaker prior to work being started?
a) A qualified electrician
b) The manufacturer of the equipment
c) Your supervisor
d) The worker doing the repairs
Answer: d) The worker doing the repairs
After completing a welding job in a residential area, how long should someone designated as a fire watch remain on site?
a) 30 min
b) 45 min
c) 60 min
d) 2 hours
c) 60 min
Hydrogen sulphide gas is lighter than air.
a) True
b) False
b) False. Hydrogen sulphide gas (H2S) is heavier than air (1.18 compared to air which is 1.00)
When making a container safe for welding by purging, which gas should be used?
a) Oxygen
b) Argon
c) Acetylene
d) Hydrogen
b) Argon
You have been assigned to work on steel beams high above the ground. Provide general protection information from the OHS Act that ensures the safety of yourself and those around you.
Your response should include some of the following points:
You should be tied off if you are working:
* At a vertical distance of 3 m or more
* If there is an unusual possibility of injury at a distance of less than 3 m
* Into or onto a hazardous substance or object or to avoid a fall through an opening in a work surface
* At a permanent work area where the height is more than 1.2 m and less than 3 m
You have been tasked with using a portable angle grinder to smooth down rough edges on a beam. What safety precautions should you take to avoid accidentally injuring yourself or others as well as avoid damaging the equipment or the
surrounding area?
Your response should include some of the following points.
You should:
* Operate the grinder in accordance with manufacturer specifications.
* Ensure that the rpm of the disc should be equal or greater to the rpm of the grinder.
* Ensure that the object being ground is stationary if using a handheld grinder
While in the shop you notice that your co worker is not wearing their hardhat. What section of the OHS Act details safety requirements for head protection, and what does it say?
Your response should include some of the following points.
You should wear protective headwear:
* If there is a foreseeable danger to the worker’s head.
* It must be appropriate to the hazards and meet requirements of CSA Standard CSA Z94.1-05.
Permanent eye damage in the form of cataracts or retinal damage can result from
over exposure to which harmful light ray?
a) Visible
b) Infrared
c) Ultraviolet
d) Reflected
b) Infrared
Which type of radiant energy can cause welding flash?
a) Visible light
b) Infrared light
c) Ultraviolet light
d) Gamma rays
c) Ultraviolet light
What must be done where the public is exposed to harmful welding rays?
a) Put up proper screens and warning signs.
b) Let people look out for themselves.
c) Weld only when no one is around.
d) Avoid the use of a long arc length.
a) Put up proper screens and warning signs.
What should you do immediately if you receive a major contact burn?
a) Rub the affected area with antibiotic cream.
b) Seek professional medical attention.
c) Cool the burned area by immersing in cool, still water.
d) Place the burned area under a fast-running warm water tap.
c) Cool the burned area by immersing in cool, still water.
Which of the following is the most common workshop hazard?
a) Heavy weights
b) High noise levels
c) Other workers
d) Poisonous gases
b) High noise levels
Above what noise level should hearing protection be worn?
a) 65 decibels
b) 85 decibels
c) 115 decibels
d) 135 decibels
b) 85 decibels
What type of eye protection is recommended for grinding operations?
a) Full-face visor and safety glasses
b) Side shields
c) Welding goggles
d) Photoelectric welding helmet
a) Full-face visor and safety glasses
What shade of filter plate is recommended for medium amperage GMAW
operations?
a) #9
b) #10
c) #11
d) # 12 or over
c) #11
Which type of material offers the best protection against sparks and molten slag?
a) Leather
b) Wool
c) Nylon
d) Cotton
a) Leather
What gloves are recommended for oxyfuel cutting?
a) Hard twist cotton
b) Silicon-treated nylon
c) Dry-tanned leather gauntlet style
d) Oil-treated cowhide with external cotton stitching
c) Dry-tanned leather gauntlet style
Why is a fit test important when using a respirator?
a) More than one worker can use it.
b) You look professional on the job.
c) To prevent inward leaks of contaminated air.
d) You do not have to shave every day.
Poisonous phosgene gas can be created by vapours of chlorinated hydrocarbon
degreasers.”What acts itpon the vapours to create the gas?
a) Local or general ventilation
b) High concentrations of visible light
c) Heavy volumes of fumes
d) Ultraviolet radiation from the welding arc
d) Ultraviolet radiation from the welding arc
Which type of respirator uses filters and cannot be safely used in oxygen-deficient
atmospheres?
a) Air-purifying
b) Airline
c) Self-contained breathing apparatus
d) Emergency escape breathing apparatus
a) Air-purifying
Which metal, when heated or welded, produces metal fume fever if the fumes are
inhaled?
a) Aluminum
b) Zinc
c) Chromium
d) Cobalt
b) Zinc
What gas is produced when oxygen reacts with ultraviolet light from welding?
a) Phosphine
b) Nitrogen dioxide
c) Ozone
d) Carbon monoxide
c) Ozone
When welding on metals plated with cadmium, which of the following is true?
a} Use a fully deoxidized filler metal to avoid porosity.
b) Consult SDS for safety procedures to follow.
c) General mechanical ventilation is adequate provided there are four complete air changes per hour.
d) A dust filter mask should be worn.
b) Consult SDS for safety procedures to follow.
Hydrogen sulphide gas (H2S) found in oil and gas wells in concentrations as low as 500 ppm (0.05%) causes which of the following?
a) An uncomfortable rotten egg smell
b) Unconsciousness and death
c) An explosion
d) Burning of the eyes and throat
b) Unconsciousness and death
What is the first line of defence against welding fumes and gases?
a) A supplied air respirator
b) Source extraction equipment
c) Complete all welding during the first half of your work shift
d) Weld outside
d) Weld outside
What device breaks the current flow while still at a low level to protect people from
electrical shock?
a) Heavy duty circuit breaker (HDCB)
b) Ground fault circuit interrupter (GFCI)
c) Heavy duty electrode holder (HDEH)
d) Transformer rectifier silicon diode (TRSD)
b) Ground fault circuit interrupter (GFCI)
What method makes welding safe on a vessel that has contained a flammable
substance?
a) Steaming thoroughly and welding while hot and still full of steam
b) Steaming well, then allowing the vessel to cool and dry out
c) Sealing all vents tightly to prevent atmospheric air from getting inside
d) Using a hot water flush, followed by cold water and a drying out period
a) Steaming thoroughly and welding while hot and still full of steam
When working in confined spaces, where should cutting torches be ignited and
extinguished?
a) Outside the confined space
b) Inside the confined space
c) Near the confined space
d) Wherever it is most convenient
a) Outside the confined space
Before entering a vessel to make repairs, what test should you first insist upon?
a) Leaks in the vessel and piping system
b) Fumes and oxygen deficiency
c) Corrosion or erosion tolerances
d) Blockages in ventilation systems
b) Fumes and oxygen deficiency
What is the verified oxygen content before a worker is authorized to enter a confined
space?
a) 7% to 12% by volume
b) 2 psi to 12 psi
c) 19.5% to 23% by volume
d) 24% to 29% by volume
c) 19.5% to 23% by volume
Who is responsible for the personal safety of everyone in the shop?
a) Shop supervisor
b) Plant superintendent
c) Individual worker
d) Alberta Occupational Health & Safety
c) Individual worker
