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. x_HSqnwmky54YLzeStJi# TZObFT*.#BQF/Q The NEC C. Suggestions Most of the hydrides of Group 1A and Group 2A metals are ionic. D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. d.Metal, Over half of all deaths caused by electricity result from contact with ________. The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. 1,[-c|"&u[Fu>wjte8j:xRk )"m_!6awT J,byp?fRBf?p|b3/Um\7"|+@5vvWAa5J^y*q,l b)Ftt4 :4,-J`! No GFCI's were used. You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. a.Ground Fault Circuit Insulator 2.Grease All of the following are essential considerations for the safe use of cords and wiring EXCEPT: Which one of these methods is not acceptable for putting out an electrical fire? 0000012360 00000 n (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. 1 0 obj How will she choose the correct cord? Provides information about the hazards that electrical workers may experience as a part of their jobs. d.50,000 volts. List the four main types of electrical injuries, Using the illustration, select the answer that matches the picture, Identify the illustration by selecting the appropriate answer. Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. Among all of the safety measures that can and should be used to prevent electrical shock, which one is the most essential? a) Ensure overhead power line safety Frames of non-electrically driven elevator cars to which electric conductors are attached. 0000005520 00000 n Explosion Leaving or using electrical appliances near water - As electric current is transmitted faster in on wet surfaces, you stand a chance of getting an electric shock. Additional minimum clearance distance is required for power lines carrying over ________. Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. Extension cords may become a trip hazard when: b.811 0000003254 00000 n Which of these can be used as insulating live-line tools for electrical protection. 10,000 milliamps (10 amps) Cardiac arrest and severe burns occur. trailer <]/Prev 500768/XRefStm 1495>> startxref 0 %%EOF 222 0 obj <>stream [, Use all equipment according to the manufacturer's instructions. How might this event affect the ability of animals to obtain energy to live? 1.Is faulty Select the correct answer and then click DONE. 0000000816 00000 n 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. Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? Which of the following are insulators of electricity? When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. BIOLOGICAL HAZARDS: term effects) and strain (longAssociated with working with animals, people, or infectious plant materials. 2.Using an aluminum ladder when the possibility exists for contact with electricity. Quiz Question 7: Which is not an insulator? 3.ack of ground fault protection. 4.Cardiac arrest d. heart attacks. Occupational Safety & Health Administration, Death Due to Lack of Ground-Fault Protection, Deaths Due to Missing or Discontinuous Path to Ground, Deaths Due to Equipment Not Used in Manner Prescribed, Deaths Due to Improper Use of Extension and Flexible Cords, Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Improper use of extension and flexible cords, Electrical Safety: Safety and Health for Electrical Trades Student Manual, ground-fault circuit interrupters (GFCI)s, assured equipment grounding conductor program (AEGCP), Electricity and Tree Care Work A Deadly Combination, Working Safely Around Downed Electrical Wires, Electrical Safety Hazards of Overloading Cable Trays, Small Business Safety and Health Handbook, Fire Fighters Exposed to Electrical Hazards During Wildland Fire Operations, Fatality Assessment and Control Evaluation (FACE) Program, NIOSH Face Reports Indexed by Industry or Cause of Fatality, Worker Deaths by Electrocution: A Summary of Surveillance Findings and Investigative Case Reports, Severe Storm and Flood Recovery Assistance. Electrical Hazards Electrical hazards can be found in nearly every roofing work site. A laborer carried a piece of wire reinforcement (10 feet long by 8 inches wide) along the top section of the scaffold and contacted the power line with it. Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. 1452 25 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! Apply a warning tag to any defective tool and do not use it until the problem has been corrected. 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. It's okay to use extension cords with worn insulation, as . 0000005042 00000 n a. 1.Pain The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. Question 2: It's okay to use extension cords with worn insulation, as long as you are careful about it. Select the correct answer and then click DONE. 3.No, because he will not be touching any grounded material when using the tool. :$#k9BPnZ{Qqe/reKy,'ZlB# 3.Vapor 2.Skin Hand-operated metal shifting ropes or cables of electric elevators. 2. 0000007464 00000 n OSHA 29 CFR 1910.147 . Select the correct answer and then click DONE. 0000009628 00000 n Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream Cardiac arrest or death - A result of electrical shock. 0000004273 00000 n he most common shock-related injuries are: Working with electricity can be dangerous. While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. Short In Power Saw/Ungrounded Temporary Power Supply: On July 10, 1986, a 22-year-old carpenter was working at the construction site of large apartment complex, using a portable electric saw to construct the wooden framework of a laundry building. c.falls. In which of the following workplace situations are you at risk for coming into contact with live electrical . Post warning signs. 0000012944 00000 n % As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. 3. 0000056642 00000 n d. Match the outlet prongs to the extension cord. ( On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. 4,600. 0000110659 00000 n 0000057373 00000 n -Glass. The ground wire was not attached on the male end of the cord's plug. 4.No, because he does not need to use an extension cord. D. Have an ANSI sticker and an expiration date. d. 20 feet. V1?`T`P``ya W3 |"H36K1A@, rO(V[|NAT30 qI? endstream endobj 221 0 obj <>/Filter/FlateDecode/Index[30 152]/Length 27/Size 182/Type/XRef/W[1 1 1]>>stream The workers had removed their shirts and were sweating. If the power supply to the electrical equipment at your site is not grounded or the path has been broken, fault current may travel through a worker's body, causing electrical burns or death. OSHA 29 CFR 1910, Subpart S . hb``b``=p0X8n0lY0L#rK[V26h* @0H!XDl+!&FfUfo`h6l A worker was removing a metal antenna when it made electrical contact with a 7200-volt power transmission line. OSHA 29 CFR 1910, Subpart P . . Both could have prevented the accident from occuring. When used on the moon? When current travels through your body - Definition of electric shock, Choose the primary cause of an electric shock, Electric shock is caused when current travels through the body, the exits the ground. 2.Complete Only after a rescue squad arrived about 4 minutes later did anyone realize that the crane was in contact with a power line -- all those present had assumed that the victim had suffered a heart attack. 0 <> 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. (D) None of the above. 0000028595 00000 n 5>vB35Plm$\4{U[lU`t~.vJGmFO^@+ cGPzNY*oS(m%q{Agp 1.Is firmly connected Remove cords from receptacles by pulling on the plugs, not the cords. 2. [Flexible Cords and Power Tools]. The workers administered CPR to the victim, but to no avail. 0000002479 00000 n Potential hazards of electricity are preventable if you do which of the following listed below? The source of the shocks -- the saw -- was not replaced. d) All of the above. d.Alert workers of any water in the area, GFCI is an acronym for: The plug of the compressor and an extension cord had been modified to fit a wall outlet for a common household clothes dryer (220 V). 0000002386 00000 n A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. Select the choices that accurately define the common electrical term. The small electrical current enters his body through his left leg. Take any defective equipment out of service. Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. 0000006893 00000 n c. Inductive objects Electrical Contractors Industry. 3.Cramp H\n0)M) 0Ir(,?FoKhdklz6zHG;mOqOh-tv.]NGv~d.m\S{|Fo-x-\"1X/niCYeq"ol8D~&?Kr V_/9yf 9JV%J899s{_G#R0="dL5,p: (b) The same reaction can also be classified as a redox reaction. As he began to pull away, the crew supervisor yelled to him, asking if the crew could use his water hose to wash out their cement bucket suspended from the crane. startxref Some of the causes of these are live wire s that may be lying around, overloaded circuits, explosions that are caused by flammable objects, etc. Which of the following are caused by contact with electricity? Do not remove ground prongs from cord- and plug-connected equipment or extension cords. If electrical equipment is used in ways for which it is not designed, you can no longer depend on safety features built in by the manufacturer. Arc Flash. [Power Tools]. d. Power outlets, ________ are anything that can transmit electrical current. To be safe, you must think about your job and plan for hazards. Which of the following can be the result of electric shock? 1 0 obj The router's 3-wire power cord was spliced to a 2-wire cord and plug set which was not rated for hard service. )KL3C?e%Y92$,]^)kmR/!8\ JF N'bT\U1+tc+&:'ZuGi!UeUrE [?CrU.&|#@Ed,=2UF]r/n/{v-;v>%/~;[*AxBU,-#!uyFGR,Wv[ cOzObnZfI4ob:pf "~ .iBE@mOs:Os5U9cnU` Vd"F'4Bm?>}hyRQyrX0U026h7#L'. The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. <> a.Standing in water 1.Missing or broken path to ground. B. 1.When you are using electricity near water The floor is covered in water and she is barefoot. . 0000420564 00000 n 2.Loose screws 3 0 obj Select the correct answer and then click DONE. 4.Broken. Visually inspect all electrical equipment before use. Carly needs to use an extension cord with her corded nail gun. If you are touching any grounded material while using a power tool How fast would the ball be moving at the moment of release? 0000001861 00000 n Explosion. (C) Hot sticks. b) By supplying GFCIs, or ground-fault circuit interrupters This is action is also known as creating or completing an electrical circuit. Does the fall qualify as an electrical accident? The contact lasts for 5 seconds before someone is able to shut off the power. c.A measurement of electricity 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. The victim was part of a crew that was constructing a concrete wall. 0000003771 00000 n Death. Overview. Metal partitions, grill work, and similar metal enclosures around equipment of over 1kV between conductors. 0000004793 00000 n Question 1: Which of these is a type of Ground Fault Circuit Adapter? 2.Flooding Co-workers provided CPR, but were unable to revive the victim. Use tools and equipment according to the instructions included in their listing, labeling or certification. OSHA requires the testing of a volt meter after a voltage test on voltage above_____. 3.Draped over equipment. trailer <<11AC4BACEBCA4B32A885F1120BD3A307>]>> startxref 0 %%EOF 153 0 obj <>stream c.Touching the motor 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. The accident site was wet; also, humidity was high and the victim was sweating. and more. 0000008392 00000 n OSHA Pros, LLC is an authorized provider of 360 Training, an OSHA-Accepted Provider, offering training and certification courses for NFPA 70E-Standard, and Hazards are created when cords, cord connectors, receptacles, and cord- and plug connected equipment are improperly used and maintained. Select the correct answer and then click DONE. 1.Flammable liquids 0000004444 00000 n Improper Use of Extension and Flexible Cords.

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