Unsafe Access/Egress. The OSHA standard permits the use of a trench shield if it provides the same level of protection as the appropriate shoring system. Support systems, shield systems, and other protective systems not utilizing Option 1, Option 2 or Option 3, above, shall be approved by a registered professional engineer. 8. We keep a pulse on the latest regulations, standards, and industry trends in safety and write about them here on our blog. This type of protective systems involves excavating the sides of a trench to form one or a series of horizontal levels or steps. The service requires full JavaScript support in order to view this website. (1)Each employee in an excavation shall be protected from cave-ins by an adequate protective system designed in accordance with paragraph (b) or (c) of this section except when: (2) Protective systems shall have the capacity to resist without failure all loads that are intended or could reasonably be expected to be applied or transmitted to the system. Angles have been rounded off. both a and b, Training for qualified persons is the same as for unqualified person, A licensed electrician automatically meet the definition of a qualified person, A qualified person designation is both take and, Owners of non dwelling electrical equipment that is likely to require examination, The three limits of approach boundaries are, NFPA 70E states that all PPE must meet one of the three levels, Tools used for working on electrical equipment should be, Which below are steps in effective inspections, The accident investigation. Read the material in each section to find the correct answer to each quiz question. Peptide Hormones Include Which Of The Following - 2 What is a hormone? As the trench is backfilled, the braces and planks can be removed to be used at another site. Their net monthly income is $4,500. What is a common hazard when multiple benches have been created for an excavation? Shields used in trenches are usually referred to as "trench boxes" or "trench shields. means an inclined walking or working surface that is used to gain access to one point from another, and is constructed from earth or from structural materials such as steel or wood. The identity of the registered professional engineer approving the design. The trench was 20-25 feet deep and had been benched about one bucket-width (4 feet) on each side. However, in this case, a competent person must examine the ground and find no indication of a potential cave-in. (4)Configurations. Distress means that the soil is in a condition where a cave-in is imminent or is likely to occur. Shoring or shielding is used when the location or depth of the cut makes sloping back to the maximum allowable slope impractical. The work often takes place in congested areas, on public roads or at building sites. Installation of a support system shall be closely coordinated with the excavation of trenches. In Type B soil, the trench excavation is permitted only in cohesive soil. Individual members of support systems shall not be subjected to loads exceeding those which those members were designed to withstand. Soil classification. Topics include the four types of trench collapse, the frequency and cost of trench collapses, trench soil types, and common trench protective systems. (5) Miscellaneous notations regarding Tables C-1.1 through C-1.3 and Tables C-2.1 through C-2.3 are presented in paragraph (g) of this Appendix. 2Cu+(aq)Cu2+(aq)+Cu(s), Hazard or mitigation controls may be short and/or long term, Hazard prevention and control should contain both, A safety and health program is called a living document why, A safety and health program changes as an organization changes, What should an incident investigation program include, I'm general accidents and incidents are caused by unsafe or hazardous conditions and, Unsafe or unhealthy actions and behaviors, Who should be on the team that evaluates a safety and health program, Who should be involved in communication and coordination of safety and health programs, Managers are considered what within an organization when it comes to safety and health, What is the ideal time for conducting witness interviews during an incident investigation, As promptly as possible since memories fade over time, Which of the following is an incident that should be investigated, Of the following who should be the best choice to write your organization safety and health program, You have been investigating an incident where a worker was struck in the head by a flying scrap of wood from a table saw which of the following corrective actions might be the most appropriate, Table saws must always have guards installed, Which of the following is a benefit for having a safety and health program, A company may need to bid on a contract that requires safety and health documentation, When should a formal hazard assessment or inspection be performed, Which of the following is a line role with regard to an organizations safety and health program, Implementing and maintaining the safety and health program, Which of the following statement are true about incidents, Nearly all workplace incidents are wholly preventable, Personal fall arrest hooks must be locking and, Designed to prevent opening and slipping off the connector, Personal fall arrest system connectors must be compatible and capable of supporting at least, If there are defects found during the inspection of personal fall protection equipment or if the equipment has been used in an arrest it must be, Three major components of personal fall arrest sustain anchor and the anchorage connector full body harness and, Horizontal lifelines shall be designed installed and used under the supervision of a what as part of a complete personal fall arrest system which maintains safety factor of at least two, Fall restraint systems must meet which of the following criteria, It is important to secure your ladder whenever feasible to, OSHA and ladder manufacturers require which of the following when ascending or descending, The three main types of portable ladders are, The 4:1 angle rule for extension ladders means which of the following, For every 4ft of the ladder it should be 1 for away from the wall, Protect yourself while working in a ladder by, Supported scaffold systems must be inspected for, Every supported scaffold and it's components must support without failure it's own weight and at least what the intended load, The guardrails on suspended scaffolds manufactured after the year 2000 must be how long with mid rails installed approximately halfway between the top rail and the platform surface, A what must be available to direct workers who are constructing a moving scaffolds, Employees must not work on scaffold surfaces until, The surface are determined to have the strength and structural integrity to support their intended loads, Hazards of type scaffold being used along with it's maximum intended load and capacity, A person must select direct employees who erect dismantle more or alter scaffold and who must inspect scafffolding to ensure compliance is called a, OSHA's specifically requires who to assess the workplace to determine if the walking and working surfaces on which you work have the strength and structural integrity to safety support workers, A what is any mechanism used to dissipate a substantial amount of energy during a fall arrest or otherwise limits the energy imposed on an employee during fall arrest, Horizontal lifelines shall be designed installed and used under the supervision of a qualified person as part of a complete personal fall arrest system which maintains a safety factor of, At least two times the maximum intended load, A what must be available to direct workers who are constructing or moving scaffolds, Electrical burns occur principally because of, The heat generated by the flow of electrical current through the body, The "B" in the acronym BESAFE stand for burns what are the 3 types of burns that are caused by exposure to electricity, An electrical hazard can be defined as a serious workplace hazard that exposes workers to which of the following, According to OSHA what does the term electrocution mean, Any overhead power line should be considered energized unless the entity owning or operating the electrical utility suppling the line certifies that it is, The minimum safe distance for equipment operating in proximity to energized power lines that contain up to 50,000 volts is, Where can minimum clearance distances for working near power lines be found, New and improved tolls and technologies exist that help prevent inadvertent shock and electrocution hazards with underground energized utilities including, The three most common GFCI's used today are, Which of the following is an electrical hazard, Extension cords should be inspected prior to their use for, For a lockout ragout to be effective all the energy sources must be isolated in the off position zero energy must be verified and each worker must apply an individual lock to the locking device the key for each persons lock is kept with, Which of the following are major causes do to the failure to follow lockout ragout procedures, The purpose of a lockout ragout checklist is to, OSHA requires all power cords to be protected from mechanical damage and environmental deterioration which includes protection from, You can help protect yourself from electrocution by, Personal protective equipment for electrical workers is designed to provide protection under certain circumstances and conditions typical footwear will be marked what if its approved for electrical work, Electrical PPE with the following defects must NOT be used Two employees were installing 6" PVC pipe in a trench 40' long x 9' deep x 2' wide. Given that E=0.52VE^{\circ}=0.52 \mathrm{~V}E=0.52V for the reduction Cu+(aq)+e\mathrm{Cu}^{+}(a q)+e^{-}Cu+(aq)+e Cu(s)\longrightarrow \mathrm{Cu}(s)Cu(s), calculate E,GE^{\circ}, \Delta G^{\circ}E,G, and KKK for the following reaction at 25C25^{\circ} \mathrm{C}25C : 2Cu+(aq)Cu2+(aq)+Cu(s)2 \mathrm{Cu}^{+}(a q) \longrightarrow \mathrm{Cu}^{2+}(a q)+\mathrm{Cu}(s) Materials and equipment used for protective systems shall be free from damage or defects that might impair their proper function. There are four types of protective systems used for trench safety: sloping, shoring, shielding, and benching. This provides a more comfortable working environment for your employees in the trench. In a group of 20 ballpoint pens on a shelf in the stationery department of Metro Department Store, 2 are known to be defective. OSHA standards mandate that all excavations _____ be protected against collapse. Occupational Safety & Health Administration. Type C soils are cohesive with an unconfined compressive strength of 0.5 tons per square foot or less, granular soils, submerged soil, submerged rock that is not stable, or material in a sloped, layered system where the layers dip into the excavation or with a slope of four horizontal to one vertical or steeper. Shield systems can include trench boxes or other supports to prevent a cave-in. all the above, When working around electricity which class of helmets is designed to reduce the danger of contact with conductors at higher voltage levels, Electrical equipment noticed in an AEGCP must be visually inspected for damage or defects, What is my employer required to do to protect workers from electrocutions, All pull boxes Justin boxes and fittings must be, Provide covers and plastic covers both a and b, When using a utility locate service to identify underground utilities which of the following is true, Locating underground utilities is not an exact science, A competent person must be designated for, When an injury is caused by impact alone it's generally recorded as, What should not be used to support a scaffold because they could collapse sending the structure to the ground, When a person is injured when crushed between two or more objects the incident recorded as this type, Amputations are caused by allowing your hands or limbs to be caught or between, When a trench is 4 feet or more in depth a means of egress from the trench must be within, Trench protective systems include which of the following, A cubic yard of soil can weigh as much as, What is the minimum distance alllowed between a spoils pile and tranches edge, Excavation safety standards have introduced in 1989, A soils are usually clays and cemented soils such as caliche and hard pan, OSHA requires that the competent person perform two visual and two manual tests on a soil sample fresh out of the ground and not impacted by weather conditions at the site, Each of the following is a type B soil except, The definition of type C-60 Spain is provided by manufacturers to allow competent, Which of the following are common soil classifications tests, A defining feature of stable rock is that it will, The most important distinction between stable rock types a and b and type c is, Which of the following statement a is true about kick out (iii) Manufacturer's specifications, recommendations, and limitations, and manufacturer's approval to deviate from the specifications, recommendations, and limitations shall be in written form at the jobsite during construction of the protective system. The actual slope shall not be steeper than the maximum allowable slope. 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). When surcharge loads from stored material or equipment, operating equipment, or traffic are present, a competent person shall determine the degree to which the actual slope must be reduced below the maximum allowable slope, and shall assure that such reduction is achieved. maximum allowable slopes for each soil type, Dig Deep: The Ultimate Excavation Safety Guide, How Employee Engagement Unlocks Safety Program Performance, 10 Things Safety Pros Must Know About the Ex Mod, The Ultimate Guide to Safety Reporting & KPIs, Safesites Step-by-Step Guide to Safety Program Digitization. Protective systems should be inspected and maintained on a daily basis, more often if conditions are constantly changing. After that time the design need not be at the jobsite, but a copy shall be made available to the Secretary upon request. 20 ft, Cylinders may be used as roller or supporters when, Whenever practicable all arc welding and cutting operations must be, Protect workers from the direct rays of the arc, Arc welding cables in need of repair must, Not be used and effectively repaired by a qualified person or disposed, When a structure or pipeline is employed as a ground return circuit, The required electrical contact exists at all joints, When welding or cutting I locations with combustibles, Hot work permit issued by the welding supervisor or other qualified person, You must never weld cut or perform hot work when, Which of the following is an example of a confined space, A permit required confined space will often have which of the following hazards, Which of the following is considered a confined space hazard, Excavations involving vapors and storage tanks are examples of a permit required confined space because both have, The potential to contain a hazardous atmosphere, A permit does each of the following except, Which of the following is a reason why a confined space permit is required, An employer must ensure the following for entry into a permit space, Safe methods for entering and exiting the space, According to OSHA standards in subpart AA 1926 1204 when must a written permit space program be made, What is an employer required to do when a permit space is present at a worksite even though employees do not need to enter the space, Take steps to prevent employees from entering the space, Testing for the presence of oxygen is important for any confined space the concentration of oxygen in a confined space should be, For occupancy of a confined space when must hazard evaluation tests be conducted, Oxygen deficiency is defined as an atmosphere with less than, An inert has such as carbon dioxide or nitrogen is used to, Disconnecting or calling lines that may empty into the permit space, Controlling and removing potential hazardous substances or hazardous energy from entering confined space is control technique known as, Who is required to provide an entry permit for a permit required confined space, The two principal types of respirators are, To safely use air monitoring equipment in a confined space an operating must, Communications system equipment to be used in confined spaces may include which [8] ENR used data on transportation, sewer, hazardous waste and water to rank firms as heavy contractors. All shoring should be installed from the top down and removed from the bottom up. Although only required for excavations deeper than five feet, its a best practice to provide some form of stabilization in all trenches. Protective systems for use in excavations more than 20 feet in depth must be designed by _____. Backfilling shall progress together with the removal of support systems from excavations. If less than 5 feet deep, a competent person may determine that a protective system is not required. Deviation from the specifications, recommendations, and limitations issued or made by the manufacturer shall only be allowed after the manufacturer issues specific written approval. Benching systems cannot be installed in type C soil. Failure to Inspect Trench and Protective Systems. A slope of this gradation is safe for Trench protective systems include which of the following. What is Type C soil? It is suited well for excavations where significant time is to be spent in one area. That is, for every foot of depth, the trench must be excavated back 1 feet, resulting in a maximum angle of 34 degrees. Footnote(1) Numbers shown in parentheses next to maximum allowable slopes are angles expressed in degrees from the horizontal. Human and administrative resources. The following figures are a graphic summary of the requirements contained in subpart P for excavations 20 feet or less in depth. (a) Scope and application. Hydraulic shoring should be checked at least once per shift for leaking hoses and/or cylinders, broken connections, cracked nipples, bent bases, and other damaged or defective parts. (2) Option (2)-Determination of slopes and configurations using Appendices A and B. From there, analyze the site conditions to determine the type of system thats best. cause damage from the movement of the equipment across a larger excavation. Excavations of earth material to a level not greater than 2 feet (.61 m) below the bottom of a shield shall be permitted, but only if the shield is designed to resist the forces calculated for the full depth of the trench, and there are no indications while the trench is open of a possible loss of soil from behind or below the bottom of the shield. After that time the data may be stored off the jobsite, but a copy of the data shall be made available to the Secretary upon request. Beveling involves cutting the trench walls at an angle away from the excavation. A or B, Bulldozer and scraper blades end loader buckets dump bodies, Flammable liquids have flash points below, OSHA specifies that for overhead power lines rated 50 kV, Must be provided on spur railroad tracks where a rolling car could contact other cars, Operating levers controlling hoisting or dumping devices on haulage, A latch device to prevent accidental starting or tripping, No person must use any motor vehicle equipment having an obstructs view, An observer to signal that it is safe to reverse, All haulage vehicles whose pay load is loaded by means of cranes power shovels, Pneumatic tired earth moving haulage equipment who's maximum exceeds 15miles, All earthmoving equipment must have a service braking, When steel tube piles are being blown out, Kept well beyond the range of falling materials, Must be provided across the top of the head block to prevent, Requires for the leads to prevent the hammer from being raised, First aid treatment and planning is only necessary if emergency medical, The area along the waterfront edge of the pier or wharf, The raised frame as around a hatchway in the deck to keep out water, Industrial truck training must consist of all but, Heat from an electric arc a stream of ionized gas called plasma or burning gases, The most common and simplest type of welding today is, A process by which two pieces of of metal are joined, Activity which depends on the heat produced by the combustion of a fuel gas, In the arc welding process eye exposure to intense visible light, Metal fume is principally associated with what chemical substance, A colorless and tasteless cannot be readily detected by the senses, Vapors of these solvents are a concern in welding and cutting
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