Frequent Question When in storage oxygen and fuel cylinders used in oxyfuel cutting must be seperated by?

Stored oxygen and fuel gas cylinders must be separated by 20 feet, or by a noncombustible barrier of five feet high with a one-half hour fire-resistance rating.

What has its own Clean Air Supply?

Self-Contained Breathing Apparatus (SCBAs) are used for entry into or escape from environments considered to be IDLH. They contain their own breathing air supply and can be either open circuit or closed circuit.

What is the most common cause of death for equipment operators?

Rollovers were the main cause of death of heavy equipment operators. For workers on foot and maintenance workers, being struck by heavy equipment or trucks (especially while backing up for workers on foot), and being struck by equipment loads or parts were the major causes of death.

What type of trench protection is designed to prevent trench wall cave ins?

Shoring – Shoring systems provide lateral support against the walls of a trench to prevent a collapse. Shoring systems can utilize metal or timber uprights, driven sheet piling, or other recognized methods.

Why must grease and oil be kept away from oxygen tanks?

The other thing you must remember is this: that when surrounded by pure oxygen, some oils and greases oxidize rapidly, fast enough to reach kindling temperature in a short time. That’s why you must always keep oxygen away from oils and grease, and keep oil and grease from getting into an oxygen regulator or hose.

Which of the following gases is not used as a fuel gas for the oxyfuel gas welding process?

Propane and Natural Gas: Have flame temperatures between 4,500 and 4,600F and are the least expensive gases available. Propane is the most efficient for heating because of its high BTU output and the large heavy heating tips that are available. These gases are not used for welding.

What is the minimum distance a spoil pile must be placed from an excavation?

Set spoils and equipment at least 2 feet back from the excavation. the trench to prevent equipment and spoils from falling back into the excavation. Where the site does not permit a 2-foot set back, spoils may need to be temporarily hauled to another location.

Are PPE used to prevent falls and protect workers who do fall?

When working on heights, there are specific Personal Protective Equipment tools available to protect the worker against falls from a height (also known as fall protection PPE). In order to ensure protection against falls from heights, there are multiple products or equipment available to avoid the risk of falling.

What must be included with every shipment of a hazardous substance?

Basic Safety Matching Game

What are the four leading causes of death in the construction industry?

The Occupational Safety and Health Administration identifies four leading causes of deaths in construction: falls, struck by an object, electrocutions and caught in or caught between. Falls. These account for 36.5% of construction deaths.

Which of the following is and will continue to be one of the greatest hazards on a construction site?

1. Falling. OSHA cites that falls account for the greatest number of fatalities in the construction industry each year. These falls may occur due to unstable work surfaces, the misuse or failure to use fall protection equipment and human error.

What is the minimum safe working distance from exposed electrical conductors?

Scenario 1: Your utility has established, as a written rule, a minimum approach distance of 4 feet, 0 inches for employee exposure to energized parts on a 25 kV system, regardless of whether that exposure is phase to ground or phase to phase.

What are the OSHA requirements for trenches?

OSHA requires employers to provide ladders, steps, ramps, or other safe means of egress for workers working in trench excavations 4 feet (1.22 meters) or deeper. The means of egress must be located so as not to require workers to travel more than 25 feet (7.62 meters) laterally within the trench.

Which of the following answer options are ways employers protect workers in trenches from equipment and materials?

Which of the following answer options are ways employers protect workers in trenches from equipment and materials? –Keep heavy equipment away from the edge of a trench. -Use a warning system when workers use mobile equipment next to or near the edge of an excavation.

What is a trench OSHA?

“Trench (Trench excavation)” means a narrow excavation (in relation to its length) made below the surface of the ground. In general, the depth is greater than the width, but the width of a trench (measured at the bottom) is not greater than 15 feet (4.6 m).

Why does oxygen react with grease?

Oxygen behaves differently to air, compressed air, nitrogen and other inert gases. It is very reactive. Pure oxygen, at high pressure, such as from a cylinder, can react violently with common materials such as oil and grease. Other materials may catch fire spontaneously.

How does oxygen react with grease?

Oxygen can react explosively with oils and greases. People have been injured or even killed when pumps, engines, tyres and pressure equipment have been blown apart by the explosion. Oxygen can also cause other materials to ignite spontaneously. The resulting fire can cause damage to equipment and injury to people.

What happens when oil reacts with oxygen?

OXIDATION — Oxidation of oil occurs in the presence of air (oxygen) and heat. The atmospheric oxygen reacts with the hydrocarbons in the lubricant to form carboxylic acids. These acids are weak, but given enough time the concentration can become high enough to cause severe corrosion of machinery parts.

Which gases are used in gas welding?

Gases used in welding and cutting processes include:

• shielding gases such as carbon dioxide, argon, helium, etc.
• fuel gases such as acetylene, propane, butane, etc.
• oxygen, used with fuel gases and also in small amounts in some shielding gas mixtures.

Why acetylene is used as welding gas?

Acetylene produces a flame temperature of ~3100 degree Celsius along with oxygen. This high flame temperature makes acetylene a suitable choice for gas welding steel. 2. Welding: When burned in oxygen, acetylene produces a reducing zone, which easily cleans the metal surface.

What fuels are used in welding?

Oxy-fuel welding and cutting use a variety of fuel gases
acetylene is the prevalent fuel gas used in gas welding due to its favorable flame characteristics and high temperature. Other fuel gases used are gasoline, hydrogen, propane, natural gas, liquefied petroleum gas (LPG), MAPP gas.

What is the minimum distance allowed between a spoils?

Keep excavated soil (spoils) and other materials at least 2 feet (0.6 meters) from trench edges. Know where underground utilities are located before digging. Test for atmospheric hazards such as low oxygen, hazardous fumes and toxic gases when &gt
4 feet deep.

What is the safety code of excavation?

1 No person shall work in any excavation, shaft, or earthwork, unless all timbering and plant used therein are inspected by a competent person before work is started and also after explosives have been used in or near the excavation, shaft or earthwork.

Which of the following is an OSHA guideline with respect to employee safety while installing support systems?

OSHA has set the following guidelines with respect to the protection of employees when installing support systems: Ensure that the members of the support systems are securely connected. Safely install support systems. Ensure that members of the support system are never overloaded.

Which PPE used for fall protection?

These kinds of PPE components are: body holding devices (e.g. harnesses, thigh straps, belts) or accessories intended for attaching a person to a structure (lanyards, mobile fall arresters, karabiners, energy absorbers, connectors, certain types of anchor points), or dynamic mountaineering devices (e.g. ropes, slings, …

What are the responsibilities of the employer to provide fall protection measures?

An employer must:

• Develop written fall protection policy and procedures relevant for the workplace.
• Identify all areas where there is a potential of injury due to fall.
• Consider the use of passive fall arrest systems first, such as guardrails, or travel restraint or fall-restricting systems.

What is fall protection OSHA?

All workers reaching more than 10 inches below the level of the walking or working surface on which they are working must be protected by a guardrail system, safety net system, or personal fall arrest system.

What is a system that protects workers from the release of hazardous energy while they work with machines and equipment?

Proper lockout/tagout (LOTO) practices and procedures safeguard workers from hazardous energy releases. OSHA’s Lockout/Tagout Fact Sheet describes the practices and procedures necessary to disable machinery or equipment to prevent hazardous energy release.

What is the most common safety grounding system?

Almost all tools and machines used in construction are equipped with guards that protect workers from rotating parts. Use three-wire cords for portable power tools. The three-wire system is one of the most common safety grounding systems used to protect you from electrical shock.

What are the most common grounding safeguards?

Module 1- safety