Found 9187 results for: Oxyfuel Gas Welding And Cutting Safety Test Answers
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The inner cone of the acetylene flame is where the greatest amount of heat and BTU delivery will be obtained. Acetylene will burn at the rate of 29 feet per second. One reason why knowing the burn rate, is in the design of cutting torch tips and...
Found: 24 May 2021 | Rating: 99/100
[DOWNLOAD] Oxyfuel Gas Welding And Cutting Safety Test Answers | latest!
For complete combustion, 2. Its burning rate is 15 feet per second. Propylene is the third class of fuel gas. It contains less hydrocarbon, so is a fairly clean gas. It requires 3. It burns at a rate of Propane is a clean burning gas. It requires 4...
Found: 24 May 2021 | Rating: 94/100
Identify and use the safety practices that should be observed when welding with oxyacetylene gas. Wear welding gloves, helmet, leather apron, welding chaps, leather shoes, welding goggles, and other personal protective equipment to help prevent weld burns and injury. Make sure the welding goggles or face shield have at least a No. Do not wear clothing made of synthetic fibers while welding. Fasten cylinders securely. Do not handle cylinders roughly. Chain cylinders in an upright position to a wall or cart. When regulators are not on cylinders, keep safety caps in place. Caps will prevent damage to cylinder valves.
Found: 23 Apr 2021 | Rating: 85/100
Agricultural Engineering Safety Lesson Plan: Oxyacetylene Welding Safety
Never use oil on welding equipment. Oil and grease may ignite spontaneously, when in contact with oxygen. Open cylinder valves correctly. Open the valve on the acetylene cylinder no more than three-fourths of a turn so it can be closed quickly in case of emergency. Open the valve on the oxygen tank fully. While welding or cutting, leave the valve wrench in position. Keep the tip pointed away from your body. Do not saturate your clothing with oxygen or acetylene. Before and while lighting the flame, keep the tip pointed away from your body. Light the flame with an approved lighter. Using matches to light the torch brings fingers too close to the tip. Set the operating pressure carefully. Never use acetylene at a pressure over 15 psi. Follow the manufacturer's recommendations for the correct operating pressures for the metal being welded and for the tip size being used.
Found: 26 Apr 2021 | Rating: 88/100
Oxyfuel Gas Welding Equipment And Supplies Answers
Do not smoke or allow anyone else to smoke near the oxy-fuel gas welder. If fuel gas were to leak from the unit, smoking could provide ignition and cause a fire or an explosion. Treat the flame with respect. Keep the flame and heat away from the cylinder, hoses, and people. Never lay down a lighted torch. Be sure the flame is out before laying down the torch. Never walk around with a lighted torch. Control flashbacks and backfires. Make certain that reverse flow-check valves and flash arrestors are installed on the oxygen and acetylene lines. Do not leave the work area until the cylinder valves are closed. Be sure the cylinder valves are closed and pressure is relieved from the hoses before you leave the work area. Never stand in front of a regulator while you are opening a tank valve. Do not weld or cut on containers that have held flammable materials. Remove regulators and replace protective caps before transporting cylinders.
Found: 15 Apr 2021 | Rating: 88/100
Store oxygen cylinders away from acetylene cylinders. A non-combustible wall at least 5 feet high should be used to separate cylinders. Handle hot metal with pliers or tongs. Do not leave hot metal on the welding table because unsuspecting persons may touch it and be burned. Check connections for leaking gases. To prevent fires or explosions, use soapy water to check connections for leaks. The KSU Cooperative Extension Service provides practical, research-based information and educational programs to address critical issues facing individuals, families, farms, businesses and communities.
Found: 23 Apr 2021 | Rating: 85/100
Welding fumes are a complex mixture of metallic oxides, silicates and fluorides. Fumes are formed when a metal is heated above its boiling point and its vapours condense into very fine, particles solid particulates. Welding fumes generally contain particles from the electrode and the material being welded. Can the composition of welding fumes vary? Yes, welding fumes contain oxides of the metals in the material being welded. Fluxes containing silica or fluoride produce amorphous silica, metallic silicates and fluoride fumes. Fumes from mild steel welding contain mostly iron with small amounts of additive metals chromium, nickel, manganese, molybdenum, vanadium, titanium, cobalt, copper etc. Stainless steels have larger amounts of chromium or nickel in the fume and lesser amounts of iron. Nickel alloys have much more nickel in the fume and very little iron. How do coatings change the composition of welding fumes?
Found: 5 Apr 2021 | Rating: 89/100
Vapours or fumes can come from coatings and residues on metal being welded. Some ingredients in coatings can have toxic effects. These ingredients include: metal working fluids, oils and rust inhibitors zinc on galvanized steel vaporizes to produce zinc oxide fume cadmium plating vapours from paints and solvents lead oxide primer paints Metal Coatings - A Source of Hazardous Fumes How do I remove the coatings? Remove coatings from the weld area to minimize the fume.
Found: 9 Apr 2021 | Rating: 85/100
Oxy-fuel (Oxyacetylene) Welding - A Guide To Gas Welding
The removal of coating will also improve weld quality. Use stripping products to remove coatings. Make sure to remove any residues before welding. Use wet slurry vacuum removal techniques for removing very toxic coatings. Do not grind coatings. Grinding dust may be toxic. What are the factors that affect worker exposure to welding fumes? Type of welding process. Filer metals and base metal used. Type of coatings present. Location open area or confined space. Type of ventilation controls mechanical or local. Work practices of welder e. What are welding gases? Welding gases are gases used or produced during welding and cutting processes like shielding gases or gases produced by the decomposition of fluxes or from the interaction of ultraviolet light or high temperatures with gases or vapours in the air.
Found: 9 Apr 2021 | Rating: 93/100
Proper Care Of Oxy-acetylene Cutting And Welding Equipment
What are examples of welding gases? Gases used in welding and cutting processes include: shielding gases such as carbon dioxide, argon, helium, etc. Epoxy coatings can produce carbon dioxide and carbon monoxide. Vinyl paints can produce hydrogen chloride. Phosphate rust-inhibiting paints can release phosphine during welding processes. Minimizing exposure to degreasing solvent vapours.
Found: 10 Apr 2021 | Rating: 88/100
Gas Welding Safety For Trainers And Supervisors
Never lay a lighted torch down on the bench or work station. If its not in your hands it must be shut down. Check Valves and Flashback arrestors must be installed on all welding and cutting equipment. When cutting or welding, clear the area of combustible materials. Never weld or cut directly against concrete. Skin contact with liquid oxygen can cause frostbite. Inspect welding and cutting equipment before use. Acetylene gas is extremely unstable and can explode easily. Because of this acetylene must remain at pressures below 15 pounds per square inch psi.
Found: 25 Apr 2021 | Rating: 86/100
Cutting Torch & Oxy Fuel Welding Equipment Inspection Section 6
Acetylene cylinders are filled with liquid acetone and a porous material to increase the stability of the acetylene. Acetylene cylinders must be used in the upright position to prevent the liquid acetone from escaping. If the an acetylene cylinder has been tipped over, stand it up and wait at least one hour before use. If the liquid acetone is withdrawn it will gum up in the regulator and check valves and decrease the stability of the acetylene.
Found: 26 Apr 2021 | Rating: 93/100
OSHA Requirements For Welding, Oxyacetylene Cutting
When combined with a burning material, pure oxygen will cause the fire to flare up and burn out of control. When mixed with a fuel gas oxygen produces the high temperature flame required for cutting and welding. Oxygen and fuel gas cylinders must be stored separately. The storage areas must be separated by at least 20 feet, or by a five foot high wall with a half hour burn rating. Inert gas cylinders may be stored separately or with oxygen cylinders. All cylinders must be stored in the vertical upright position with protective caps firmly in place. Storage areas must be located away from stairwells, doorways and halls so they do not block exit. Storage areas must also be located away from any potential sources of heat or flame. A fully charged oxygen cylinder holds approximately psi at 70 0 F. Oil should never be used on any gas cylinder connections. Soapstone can be used to mark empty cylinders with MT on the top. Empty cylinders should be stored separately from full cylinders.
Found: 22 Apr 2021 | Rating: 90/100
Oxyfuel Cutting - Process And Fuel Gases - TWI
Each operator has the right and responsibility to be safe in the workplace. All components of the system should be checked before operation. The cutting torch oxy fuel welding equipment safety inspection checklist: Compressed gas cylinders oxygen acetylene tank and others Before use, have all cylinders been handled properly. Are there any physical signs of damage? Check valve assembly on each cylinder? Inspect the chains or other device used to secure the acetylene oxygen tanks. Attach regulators Be sure that each regulator is correct for the cylinder it is to be attached to.
Found: 25 Apr 2021 | Rating: 93/100
The Importance Of Exercising Oxyfuel Welding Safety
Be sure that the regulator is designed for the pressure of the cylinder. Blow out the oxygen valve assembly before attaching the oxygen regulator, to eliminate the potential for a dust explosion. Inspect the regulator and cylinder valve for presence of any oils or grease. Make sure the adjusting screw has not been damaged.
Found: 21 Apr 2021 | Rating: 89/100
Check the pressure relief port. Cutting Torch or oxy acetylene torch Inspect the torch. Are inlet connections unsatisfactory for threading a tight connection? Is there obvious physical damage on the torch? If using a combination torch, are the O-rings at the base of the cutting attachment in place and free of cracks? Is there any evidence of soot buildup on the torch body? Are the threads satisfactory on the head of the torch, to correctly tighten in the tip? Safety devices Safety devices normally consist of check valves and flashback arrestors. These devices will be placed at the outlet of the regulator or the inlet of the torch, or both. Check valves may be used, flashback arrestors, or both. By definition, a check valve stops the reverse flow of gas. This prevents mixed gas in the system. A flashback arrestor stops flame. Safety devices should be replaced periodically. A check valve contains a rubber diaphram that will stop the reverse flow of gas and operates at 2 psi.
Found: 8 Apr 2021 | Rating: 92/100
There are many dangers related to welding. During the training session, have PPE available to show and for employees to try on. Review the true or false quiz. Background Most farms and small shops have some type of equipment for welding and cutting metals. Acetylene is the most commonly used fuel gas. Acetylene is very flammable and hazardous, and can ignite at a wide range of concentrations. Gases are stored in cylinders which can rupture. A cylinder containing compressed gas can shoot through the air like a rocket if its valve is damaged or broken. Storage and Handling Keep cylinders away from physical damage, heat, and tampering. Securely chain equipment to prevent falling. Store away from flammable and combustible materials.
Found: 27 Apr 2021 | Rating: 89/100
Oxyfuel Cutting - Process And Fuel Gases
Store extra gas and oxygen cylinders separately. Store in an upright position. Close cylinder valves before moving. Protective caps or regulators should be kept in place. Roll cylinders on bottom edges to move—Do not drag. Allow very little movement when transporting. General Gas Welding Safety Tips Inspect equipment for leaks at all connections using approved leak-test solution. Inspect hoses for leaks and worn places.
Found: 7 Apr 2021 | Rating: 93/100
Oxyacetylene Welding, Cutting And Heating - TWI
Replace bad hoses. Protect hoses and cylinders from sparks, flames, and hot metal. Use a flint lighter to ignite the flame. Stand to the side away from the regulators when opening cylinder valves. Open cylinder valves very slowly to keep sudden high pressures from exploding the regulators. Open and light acetylene first, then open and adjust oxygen to a neutral flame. Follow the manufacturer's recommendations for shutting off the torch. If the guidelines are not readily available, the commonly accepted practice is to close the oxygen valve first. When finished, close cylinder valves, bleed the lines to take pressure off regulators, neatly coil hoses, and replace equipment. Have a fire extinguisher easily accessible at the welding site. Personal Protective Equipment Infrared radiation is a cause of retinal burning and cataracts. Protect your eyes with safety glasses. Protect your body from welding spatter and optical radiation hazards with protective clothing.
Found: 27 Apr 2021 | Rating: 88/100
Oxy-fuel Equipment Safety Guidelines
Keep clothes free of grease and oil. Proper Ventilation Be sure there is adequate ventilation available when welding in confined areas or where there are barriers to air movement. The ceiling height is not less than 16 feet. Cross ventilation is not blocked by partitions, equipment, or other structural barriers. Welding is not done in a confined space. Review the Following Points Proper personal protective equipment is important. Acetylene is very flammable. Inspect all equipment before welding. If ventilation is not sufficient, then the welding area should be equipped with mechanical ventilating equipment. Always have a fire extinguisher ready for immediate use. True or False Answer Key T.
Found: 3 Apr 2021 | Rating: 86/100
Basic Welding Safety Test | 1medicoguia.com
The proper and responsible use of oxy-fuel equipment is essential for shop safety, and it is always a good idea to read and follow all manufacturer instructions on all equipment before use. Accidents can occur when equipment is improperly maintained or used, but luckily, most safe practices are based around common sense. The safe operation of oxy-fuel equipment does require a clear understanding of oxy-fuel torch apparatus, as well as the fundamentals of combustion. Remember, the improper use of an oxy-fuel cutting torch can cause serious injury or death.
Found: 27 Apr 2021 | Rating: 88/100
These torches are probably the most dangerous piece of welding equipment out there, and the oxyacetylene process produces a flame over degrees C. Triangle of Combustion Combustion requires fuel, oxygen, and heat, and as an operator, you need to control them. Oxy-fuel processes produce sparks and flames, which is why a clean workspace is essential. This process also produces small amounts of infrared rays, so be sure to wear the appropriate personal protective equipment, or PPE, such as a full-face shield with safety glasses with the correct shade lenses underneath. If you work in street clothes, wear tightly woven natural fibers. Wool, for example, is naturally flame retardant, as is denim. Wearing a welding jacket is ideal, and some intense applications require leather chaps and spats for further added protection. Long sleeves and pant legs such as jeans should be worn while oxy-fuel cutting.
Found: 26 Apr 2021 | Rating: 87/100
Cutting Torch Oxy Fuel Safety - Section 3. Understanding Acetylene And Other Fuel Gases
Short sleeves and shorts could lead to burns. Also, collars and upturned sleeves on button-up shirts and cuffed pant legs should be avoided since they provide the perfect environment to catch and collect falling slag and sparks. Cylinder Identification Cylinders are not color-coded to indicate the specific gas contained within. Suppliers can paint their cylinders any color they choose. Always read the labels to be certain what gas you are about to use, and if there is no label, do not use it. All cylinders will have a United Nations ID number on their labels. Store your acetylene cylinders in an upright position and avoid using acetylene above 15lbs of pressure — they contain a porous mass that has been saturated with liquid acetone.
Found: 5 Apr 2021 | Rating: 92/100
Oxyacetylene Welding, Cutting And Heating
The acetylene gas is then pumped into the cylinder, which is in turn absorbed into the acetone and released upon use. More than 15lbs of pressure and acetylene often tends to disassociate and cause a chemical reaction and spontaneous combustion. Regulators Cylinders are outfitted with gas-specific regulators since gases have different volumes and pressure requirements. Inspect regulator valves, seats, and threads to properly ensure they are free from oil and debris. Any contaminated parts must be cleaned and inspected by qualified service personnel. This is particularly important for oxygen valves; oil or grease combined with oxygen is flammable — or even explosive.
Found: 15 Apr 2021 | Rating: 89/100
Oxy-fuel Welding And Cutting - Wikipedia
Remember, stand aside from the regulator when slowly opening the cylinder valve. It is highly unlikely that the regulator will fail, but if it does, it will most likely force the gas in the direction of the regulator bonnet. Alternate gas valves can be opened all the way. Pressure will change, and so will your settings and could cause damage to the regulator. Hoses There are three grades of hoses: R- and RM-grade hoses, for acetylene, and T-grade hoses can be used for any type of fuel gas, and are the only grade permissible for use with alternate fuel gases. Acetylene hoses are typically red, with a groove across one nut. This indicates it is a left-hand thread. Oxygen hoses are typically green and will not have a groove, meaning it is a right-hand thread. Check hoses for cracks and contaminants. Simply adjust the regulator knob to about 5 PSI and let the gas flow for several seconds. This time may vary depending on the length of the hose. Once purged, close the torch adjusting knob or regulator adjusting screw and repeat for other hoses.
Found: 19 Apr 2021 | Rating: 87/100
Welding, Cutting, And Brazing Safety - OSHAcademy Free Online Training
Torch Inspection Torches can come in two pieces: the handle and its various attachments. However, single piece, or straight cutting, torches are relatively common as well. Before adding any attachments, inspect the torch seating area as well as the thread assembly. Always be sure to inspect your attachments before use; check the cone and that both O-rings are still present and undamaged. For cutting attachments, also check the seating end of the tip — any dents or scratches could cause a leak. Inspect cutting and heating tips to ensure holes are clear. The seating of cutting tips should be examined for scratches and dents also, and before use, make sure the lever for the cutting oxygen moves freely. Leak Test Once your attachments and tips have been connected, check your entire system for leaks. Completely back out the regulator adjuster and slowly open the torch gas valve on the cylinder until the high-pressure gauge stabilizes.
Found: 28 Apr 2021 | Rating: 88/100
Welding - Safety Test | Other Quiz - Quizizz
Shut the torch valve off. Watch the gauge for any drop in pressure. If no leak is evident, open the cylinder valve again and adjust the regulator to deliver 20 PSI. Repeat the process with the fuel gas, but make sure the fuel gas regulator only delivers 10 PSI. Afterward, close the valves on both cylinders. Watch both gauges for a couple of minutes, and if the readings do not change, your system is not leaking. Open the torch valves again. If the gauge needles move, that means there is a possible leak. Stop right away and do not use any leaking equipment. Check your connections, and if a leak cannot be found you should have the equipment inspected by a qualified technician.
Found: 21 Apr 2021 | Rating: 87/100
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