Welding Safety Quizlet questions with 100% correct answers

Safety is of paramount and horseplay will not be tolerated Good ventilation is required to prevent the buildup of oxygen fuel gas and toxic fumes Oxygen itself will not burn but the presence of pure oxygen will serve to accelerate combustion Oil and grease in the presence of oxygen can ignite and burn violently Clothing should include Long sleeve shirt and pants no matches or lighter in shirt pockets and tape pockets shut Hat turned backwards to protect from slag falling down shirt leather shoes with no laces preferred leather gloves For gas welding and brazing use number 3 or 4 green shaded tempered lenses When arc welding including TIP and MIG welding use number 9 - 12 lenses and full face and neck covering helmet Some eye protection hoods have electronically darkening lenses (3-12) which automatically dark as soon as the arc is ignited Welding goggles should fit close to the face Brilliance can cause burn damage to the retina ultravoilet/infrared rays causes burn damage to the whites of the eyes Flying sparks and slag can cause undetectable damage to the eyes such as infections Goggle consists of inner dark lens, outer clear lens to protect inner dark lens from damage caused b sparks and metal splatter, and outer clear lenses are not as expensive to replace Color of lens is determined by type of welding performed Green or brown lens are usually used from steel welding The shade of lens is identified by a number: lower numbers indicate lighter shades Prior to using goggles check for cracks in lens, gaskets behind lens, and proper tinted lens When welding make sure there is 50 ft between you and anyone who does not have eye protection When using hand tools use safety goggles Work area must have fire proof flooring Heat resistance shields should be used to protect walls or unprotected floors Because of flying sparks and slag during welding cutting processes keep floors clean of trash, debris, oil, and grease Have rated fire extinguisher with correct capacity in the welding area Use work benches with fireproof tops The more light when welding the better Always store cylinders in an upright position Steel cap must always be installed on a cylinder if a regulator is not attached Oxygen and fuel bottles should be separated If space is a factor a 5 ft wall with a 1/2 hour burn rating may be fabricated separating field and oxygen cylinders Fuel cylinders must have sufficient ventilation to prevent gas build up in case of lean and a warning sign must be posted Cylinders must be restrained to prevent falling If cylinder is leaking then move to outdoors and place a sign on it It is okay to store oxygen bottles on their sides but never acetylene If acetylene bottle is stored on its side it must wait two hours in an upright position before being used Never light a welding torch using lighter or matches only use flint type striker with a flame cup to ignite torch Always point torch away from cylinders combustibles, yourself, and others when lighting Flashback burning back of flame into the mixing chamber of the torch and into the cylinders, shutdown, investigate, there maybe a shrill whistling sound Backfire momentary backward flow of gases at the tip of the torch - flame goes out and back on emits snapping/popping sound Backfire is not as dangerous as flashback and does not require turning off gases Five common causes of backfire dirt or obstruction at tip of torch gas pressure incorrect loose torch tip overheated tip touching the weld with the tip When flashback occurs the flame disappears Both acetylene and oxygen gases must be turned off at the torch needle values and bottles to prevent the flame from reaching the regulators and cylinders Always shut the welding equipment down and investigate Carbon dioxide is effective in combating gasoline or oil fires and maybe used on wood or fabric fires always shut off fuel source asap otherwise fire extinguisher is useless in the ol long haul Never use oil or grease around oxy fuel keep flames away from cylinders and hoses