a.A small current 1.Cuts Carly needs to use an extension cord with her corded nail gun. d. Match the outlet prongs to the extension cord. Should Ajay use a GFCI? 0 Latoya is using a mixing motor to mix pool chemicals in a plastic drum. The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. -If current passes through the body near the heart or brain. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. 2.Grease No GFCI's were used. 2.Loose screws Electrical hazards are life threatening incidents that could happen due to electricity. Co-workers provided CPR, but were unable to revive the victim. Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. Take any defective equipment out of service. What factors determine the severity of Dirk's injuries? Additionally, the ground prong was missing and there was no GFCI protection. Handling Damaged Extension Cord When Energized: A 19-year-old construction laborer was working with his foreman and another laborer to construct a waterfront bulkhead for a lakeside residence. Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. 4.Dirt build-up, Use only approved and authorized power tools in areas where the following hazards may be present: Electrical Hazards Electrical hazards can be found in nearly every roofing work site. Which of these can be used as insulating live-line tools for electrical protection. -Current= the movement of electrical charge. c) Establish and enact an assured equipment grounding conductor program (AEGCP) %PDF-1.4 % :$#k9BPnZ{Qqe/reKy,'ZlB# What is the primary purpose of properly grounding equipment? %PDF-1.5 Quiz: Electrical Hazards. Flexible Cord Not 3-Wire, Hard Service Variety: A worker received a fatal shock when he was cutting drywall with a metal casing router. Ground all power supply systems, electrical circuits, and electrical equipment. endobj 5.Twitch, Electrical shock may result in: Ajay needs to use a dewatering pump to drain standing water on a construction site. %%EOF View Answer Answer: 600v 4 . _.9u'2G_0 Ue]e"x5|Y Select the correct answer and then click DONE. The victim used two extension cords to supply power: a home-made cord plugged into an ungrounded receptacle on the pole, and a UL-approved cord extending from the homemade cord to the saw. trailer <]/Prev 500768/XRefStm 1495>> startxref 0 %%EOF 222 0 obj <>stream This is action is also known as creating or completing an electrical circuit. The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. 2. d.Metal, Over half of all deaths caused by electricity result from contact with ________. 0000002557 00000 n 2. 30 days B. Question 1: Employers must ensure that every electric utilization system and all utilization equipment installed, majorly modified, or replaced after March 15, 1972, complies with the standards for electricity set by the National Fire Protection Association, which have been adopted by OSHA. Select the correct answer and then click DONE. How fast would the ball be moving at the moment of release? lex has set up a mobile engine testing station in the maintenance area. The auger then fell across the other worker, the 24-year-old victim. b. 3. (3,2,1), (5,4,3). b) Staples As she is adding in the chemicals, her hand touches the motor and it becomes energized. a.Yes, because the electrical shock caused the fall. 1. The following hazards are the most frequent causes of electrical injuries Contact with Power Lines, Lack of Ground-fault Protection, Path to Ground Missing or Discontinuous, Equipment Not Used in Manner Prescribed, and Improper Use of Extension and Flexible Cords. 1476 0 obj <>stream -Severe skin burns. 1. Select the correct answer and then click DONE. 0000002386 00000 n De-energize and ground lines when working near them. What type of burns are the result of current flowing through and exiting the body? q>NmnLNmb$"Iyx1bD9.~Ll. Is not broken, Question Text: Electrical tools should be grounded with a(n)________. The auger has a one-quarter horsepower motor encased in a metal housing with two handles. [, Do not modify cords or use them incorrectly. 0000010155 00000 n Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. There were no eyewitnesses to the accident, but evidence suggests that while the victim was handling the damaged and energized extension cord, he provided a "path to ground" and was electrocuted. b.Not wearing insulating shoes or boots when she was handling electrical equipment A 120v. 0000000016 00000 n Question 2: Which of the following are ways employers must protect their employees on the workplace? Due to the dynamic, rugged nature of construction work, normal use of electrical equipment at your site causes wear and tear that results in insulation breaks, short-circuits, and exposed wires. The modification of the plug was not an intended use or prescribed by the manufacturer. Death. Extension cords had poor splices, no grounds, and reversed polarity. If a defective power tool gives you an electric shock, how might your muscles react? using a 30-amp breaker in a system with 15- or 20-amp receptacles. 3.When you are using portable power tools A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. c.Touching the motor An 18-year-old worker at a construction site was electrocuted when he touched a light fixture while descending from a scaffold for his afternoon break. a. Gaseous matter Match the length from job to outlet. 0000003413 00000 n c.The outlet. To be safe, you must think about your job and plan for hazards. Bob is asked to repair some overhead wiring, requiring the use a ladder. Muscular contraction and nerve damage occur; death likely. . HJ=S~68438IR/:VR C Y<7H*$F>ya)N1bTa+'OdzydV9QS]b{}(=q?pH,mt8{Ag ]wp?2N$AfnhBL!jV=6ho)5jA8H`Bkh{T[v\G%b|4| Eo*cF ]TBGjB[r6)WzCkQ;Bx(]*JG;&o0TV.P=s4Gs(&e~}j76,-6at$]r**-I!o66PqK.z "*D b.10 feet 4. 3.Cramp 0000002122 00000 n When inspecting extension cords, look for: Improper Use of Extension and Flexible Cords. Select the correct answer and then click DONE. Find the energy required to raise an electron from the n=4n=4n=4 state to the n=5n=5n=5 state in Li2+\mathrm{Li}^{2+}Li2+ and in hydrogen atom. trailer 0000024814 00000 n b.The tool's power cord. Electrical hazards like frayed cords, missing ground pins, improper wiring or the harm that these hazards pose. a.related to muscle damage. (D) None of the above. Which of the following injuries can occur when muscles flex or twitch from an electrical shock? xb```VVF A10p,``Pp`hhdpn``r`L:[ I,aZ4Knj21 `ny; Ge7t@OrMx)"cx&e:[~J%aUJ\*t 3.Loose nuts Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. The small electrical current enters his body through his left leg. xYmo -ER/&@[D,_! Question 2: Which of the following is NOT a category of electrical burns? a.Yes, as it is a mobile engine testing station. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. endobj s\A0W+GA?~G?nnnnnnnnnnnn>>{Wrbrbrbrb sbZef'N(:QvD":1vbo7o7o7W*_bTs6ivyU,;dFW` { endstream endobj 191 0 obj [/ICCBased 211 0 R] endobj 192 0 obj <> endobj 193 0 obj <> endobj 194 0 obj <> endobj 195 0 obj <> endobj 196 0 obj <>stream _5JKy. Dust Quiz Question 3: Power cords can be damaged by which of the following? What was Latoya's first mistake? <> 0000017163 00000 n Dirk, a 28-year-old mechanic, is performing maintenance on a piece of equipment when he is shocked. Explosion lb MKS 2. Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. 3 OSHA requires the testing of a volt meter after a voltage test on voltage above_____. 0000012944 00000 n Select the correct answer and then click DONE. 4.Good condition of moveable parts, Items that could encourage overheating and cause tools to malfunction or start a fire include: 3.Needs to be reset 2.Is working properly No Ground-Fault Circuit Interrupters (GFCIs): A journeyman HVAC worker was installing metal duct work using a double-insulated drill connected to a drop light cord. D 600v. The victim signaled the operator of the crane to extend the boom and lower the hoist cable. 0000422244 00000 n To verify an electrically safe work condition, all these conditions should be confirmed EXCEPT: Effective training of employees includes all of the following EXCEPT: How to operate power tools in wet conditions. Adapter For 3-Prong Cord Not Grounded To Outlet: On May 27, 1986, two workers were using a 110-volt auger to install tie-down rods for a manufactured home. 0000003771 00000 n Cardiac arrest or death - A result of electrical shock. 1.The humidity of the environment Select the choices that accurately define the common electrical term. b.Electrical tools As a result, the ground prong of the welder plug did not insert into the ground terminal of the cord, so that as soon as a connection was made, the outside metal case of the welder became energized, electrocuting the victim. 0000012360 00000 n To avoid injury or death, you must understand and recognize hazards. 0000068035 00000 n 0000007694 00000 n d.Adapter, What is a GFCI? <> 3 0 obj 3. Question 1: Which of these is a type of Ground Fault Circuit Adapter? The laborer, who was wearing leather gloves, received an electric shock and dropped the wire reinforcement, which fell across the power line and simultaneously contacted the metal rail of the scaffold, energizing the entire scaffold. <> The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. OSHA 29 CFR 1910, Subpart S . -Rubber. 1.Using a fiberglass ladder when the possibility exists for contact with electricity. d. 20 feet. Study with Quizlet and memorize flashcards containing terms like Among all of the safety measures that can and should be used to prevent electrical shock, which one is the most essential?, According to NFPA 70E, job briefings must be held for those employees that will be working on or near live parts operating at ______ or more., When does electricity become hazardous to humans? d.Add more outlets. Frequently inspect electrical systems to insure that the path to ground is continuous. Electric current cannot exist without an unbroken path to and from the conductor. Select the correct answer and then click DONE. Does the fall qualify as an electrical accident? In addition to contact with power lines, the top electrical hazards include: 0000005050 00000 n One hand drill was not grounded, and the other had no safety plate. 0000002876 00000 n Potential hazards of electricity are preventable if you do which of the following listed below? Quiz Question 2: Which is acceptable when using powdered tools? b.Yes, as it would be too expensive to install more permanent wiring and receptacles. 0000004965 00000 n [Power Tools]. 4.Organs, The presence of ________ can turn you, your equipment, or insulators like wood into conductors. NFPA 70E defines those special circumstances and sets rigid electrical safety limits on voltage exposures, work zone boundary requirements and necessary personal protective equipment (PPE). She finds several available in the shop. 3.Body tissue 2.Yes, because he is using a portable power tool. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. OSHA 29 CFR 1910, Subpart P . 0000057373 00000 n <>>> vpfuI)],s trailer <<11AC4BACEBCA4B32A885F1120BD3A307>]>> startxref 0 %%EOF 153 0 obj <>stream a. [Flexible Cords and Power Tools]. b) By supplying GFCIs, or ground-fault circuit interrupters Continually audit cords on-site. 0000004273 00000 n Then answer the questions below. 0000001116 00000 n It is important to note that NFPA 70E is a . Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. 0000421920 00000 n c.Absorb any water around the area Intentionally creating a low-resistance path that connects to the earth. Whether the hazard is posed by worn or damaged power tools or cords, improperly grounded tools or equipment, or the presence of standing water, it is the responsibility of the contractor to make sure the tools and equipment
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