Line A Exam: Health, Safety, and Material Handling Flashcards
How is phosgene gas produced?
Phosgene gas can be produced by the ultraviolet light from a welding arc.
Describe the abbreviations “P.A.S.S” when referring to fire extinguishers.
Pull the pin
Aim the nozzle
Squeeze the handle
Sweep from side to side
Describe extinguisher class A.
A - “Ash” ordinary combustibles such as wood or paper.
Green triangle shape, and contains water.
Describe extinguisher class B.
B - “Bubble” oil or grease. Red box, contains foam.
Describe extinguisher class C
C - “Circuit” electrical. Blue Circle, carbon dioxide (dry chemical).
Describe extinguisher class D
D - “Drilling” ie. metal shavings and metal alloys. Yellow star, fine sand (dry chemical specific to metal).
Describe extinguisher class K
K - “Kitchen” cooking oils and grease. Black hexagon, wet chemical (foam to trap vapours).
What steps can be followed to reduce the risk of electric shock?
- Don’t allow live metal parts to touch bare skin or wet clothing.
- Ensure welding gloves are dry
- Wear rubber-soled boots
- All tools and equipment should be kept dry at all times
- Don’t use any cables with damaged electrical connections
- Workpiece lead should be as close to work area as possible
What does SCBA represent?
Self-Contained Breathing Apparatus.
Define a hot work permit.
A hot work permit covers any activity that involves an open flame or something that produces heat or sparks.
ie, welding, grinding, cutting, gouging, etc.
It is the responsibility of the employer to complete, submit, and have an approved permit before work can begin.
When are you to use an SCBA?
A Self-Contained Breathing Apparatus must be used for escape situations where hydrogen sulfide levels are high or for large distances where supplied-air respirators would not provide protection.
What type of radiation do welding arcs produce?
Welding arcs produce non-ionizing radiation in the form of a visible light called Ultraviolet Light.
Describe UV light.
The bright visible light produced by welding arcs prevents welders from seeing the weld puddle and tip of the electrode because of its brightness. Looking at this light can result in temporary loss of vision with no long-term effects, although it can impede safe work.
What are the effects of being exposed to UV radiation.
Exposure to UV Radiation can cause reddening and burning of the skin and can be more intense than the UV radiation from the sun.
Describe arc flash.
Exposure to UV Radiation when welding can possibly burn the surfaces of the corneas, an effect called arc eye or arc flash that comes to notice several hours after exposure. It results in a feeling similar to sand in the eye. Repeated exposure can cause permanent damage.
