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3. Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. d.Constructive objects, Select all answers that apply to the following statement and then click DONE. 2.Loose bolts Intentionally creating a low-resistance path that connects to the earth. a.20,000 volts 4.Circuit breakers, When inspecting power tools, look for: 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. -Severe skin burns. -Current= the movement of electrical charge. startxref Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. 4. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. c.Gasoline The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. -Grounding= a conductive connection to the earth which acts as a protective measure. 4. (B) Switch sticks. Contact utilities for buried power line locations. 0000007741 00000 n 4.On equipment that must run unattended for long periods of time, Manufacturing equipment may be grounded using a wire connected to a rod driven into the earth. endobj Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. 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. When it completes a circuit through the body. Others, such as office workers and sales people, work with electricity indirectly and may also be exposed to electrical hazards. b.Shut off power within five minutes of the imbalance 0000089142 00000 n The victim was totally deaf in one ear and suffered diminished hearing in the other. Out of several possible scenarios, the most likely was contact between the exposed wires of an extension cord and a screw that protruded from the receptacle, which had its face plate removed. 3 0 obj Select the correct answer and then click DONE. c) Age 4.Dirt build-up, Use only approved and authorized power tools in areas where the following hazards may be present: d.A power tool, A GFCI is designed to: 5.Twitch, Electrical shock may result in: c.Three-prong plug A fan connected to a 120-volt electrical system via an extension cord provided ventilation for a worker performing a chipping operation from an aluminum stepladder. Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). 0000002195 00000 n d.The body of the power tool. 4 0 obj When you plug in a device (e.g., a power tool), the electricity takes the easiest path from the plug-in, to the tool, and back to the power source. a.311 Other protective measures include guarding or insulating the lines. In addition to contact with power lines, the top electrical hazards include: C 277v. Co-workers provided CPR, but were unable to revive the victim. 0000001604 00000 n Electrical Contractors Industry. The following references aid in recognizing hazards associated with electrical work. ZR)!=w|; @uT C0? Electricity becomes hazardous when it takes an unintended path to complete the ________. 0000001814 00000 n What was Latoya's first mistake? 0000001646 00000 n c. Extend the reach of the power tool. 0000004965 00000 n Use tools and equipment according to the instructions included in their listing, labeling or certification. Apparently, his hand contracted and he was "locked" to the saw. 0000108653 00000 n 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. 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. b.Rod What factors determine the severity of Dirk's injuries? You should? What type of burns are the result of current flowing through and exiting the body? 0000055319 00000 n Electrical Safety Multiple Choice Questions and Answers for competitive exams. 0000021516 00000 n 1.Flammable liquids Which of the following part of you body can burn if you come in contact with electricity? Suppose a volcano threw so much ash into the air that it blocked much of the sunlight. 1.Is firmly connected 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? 0000009628 00000 n What is the primary purpose of properly grounding equipment? OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. The accident site was wet; also, humidity was high and the victim was sweating. d. 20 feet. b.burns. Provide a safe path to earth ground for electricity. A. indoors. Do not remove ground prongs from cord- and plug-connected equipment or extension cords. 4. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. (b) The same reaction can also be classified as a redox reaction. Use only extension cords that are marked with a designation code for hard or extra-hard usage. (A) Shotgun sticks. c) Establish and enact an assured equipment grounding conductor program (AEGCP) uVNSF!UTRQ91uR,6@hCH}]GAlaPh)NeT$iQ89S9|?4wahU ltz9 PH[$I&VX9WG%K~1{u8M:D"+HLEy 3@NR^z!rB^?RyOj;'Lof. -Damage to internal organs. Extension cords may become a trip hazard when: @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ b.10 feet Use only equipment that is approved to meet OSHA standards. d.Alert workers of any water in the area, GFCI is an acronym for: d) All of the above. Power was supplied through two extension cords from a nearby residence. 2.Placed along a wall. 0000005632 00000 n The source of the electricity was apparently a short in a receptacle, but examination revealed that the electrical equipment used by the contractor was in such poor condition that it was impossible to make a certain determination of the source of the short. A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. trailer lex has set up a mobile engine testing station in the maintenance area. Remove cords from receptacles by pulling on the plugs, not the cords. The modification of the plug was not an intended use or prescribed by the manufacturer. b.The tool's power cord. C. near water. 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? The auger has a one-quarter horsepower motor encased in a metal housing with two handles. c.Touching the motor Regarding hand protection employers should: A. 2. Select the correct answer and then click DONE. c.Wood Is the west coast of Africa a plate boundary? a.Two-prong plug On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. b. Death. 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. A 29-year-old worker was electrocuted when he pushed a crane cable into a 7,200-volt power line. Select the correct answer and then click DONE. d.Adapter, What is a GFCI? What do tripped circuit breakers and blown fuses indicate? endobj 0000002876 00000 n (See NFPA 70E-2021 Article 130 and OSHA subpart S part 1910.333 (a) (1)- (2) and (c) for complete details.) OSHA requires the testing of a volt meter after a voltage test on voltage above_____. Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. d. 411, You are working with a 10-foot section of a conductive pipe near power lines. 0000004274 00000 n 0000007427 00000 n 0000014257 00000 n 2. c. Inductive objects Bob is asked to repair some overhead wiring, requiring the use a ladder. Post warning signs. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . [Flexible Cords and Power Tools]. How might this event affect the ability of animals to obtain energy to live? Which of the following injuries can occur when muscles flex or twitch from an electrical shock? Electrical hazards like frayed cords, missing ground pins, improper wiring or the harm that these hazards pose. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. Since the outlet at the adjacent property had no socket for a ground prong, the extension cords were plugged into the outlet using an adapter, but the ground wire of the adapter was not grounded. 0000010603 00000 n 0000007464 00000 n 0000005716 00000 n Visually inspect all electrical equipment before use. Examples Of Electrical Hazards. View Answer Answer: 600v 4 . gYpV:+ endobj xref When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. Test your knowledge with our electrical safety quiz below. Dirk, a 28-year-old mechanic, is performing maintenance on a piece of equipment when he is shocked. The pole had not been inspected by the city and was not in compliance with code requirements (it was not grounded). 3.Draped over equipment. Identify the oxidizing and reducing agents. 1. g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream -Voltage= a measure of electrical force. Examples of Equipment That Can Contact Power Lines. 0000010155 00000 n 0000422244 00000 n Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? Carly needs to use an extension cord with her corded nail gun. Explain the purpose and use of the MyPlate symbol. A worker was removing a metal antenna when it made electrical contact with a 7200-volt power transmission line. Question 1: Which of these is a type of Ground Fault Circuit Adapter? 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? endobj Is not broken, Question Text: Electrical tools should be grounded with a(n)________. 2.Using extension cords or electrical tools properly. 4.Damaged cover or insulation, When using electric-powered hand tools, do not overload: Ground metal parts of the following non-electrical equipment, as specified by the OSHA standard [29 CFR 1926.404(f)(7)(v)]: Frames and tracks of electrically operated cranes. . 3.Cramp The NEC C. Suggestions When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: a.Shut off power within a fraction of a second H\n@0vj@/R#tnvihavopnS1>v8Z6zLpOCRU.O^6pImjgk{xv6%zp\,{|7_WqNfhu09$U?kW}: }y}]OIL5~W*8D~%W-yww;sORYbfspA.%YJV L%=Kx&0W+ hbb``b``3N0  endstream endobj 183 0 obj <>/Metadata 28 0 R/Names 184 0 R/Outlines 23 0 R/Pages 27 0 R/StructTreeRoot 30 0 R/Type/Catalog/ViewerPreferences<>>> endobj 184 0 obj <> endobj 185 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 186 0 obj <> endobj 187 0 obj <> endobj 188 0 obj <>stream The ________ keeps the electricity on its intended path through the conductor. Quiz Question 3: Power cords can be damaged by which of the following? Select the correct answer and then click DONE. 2.Skin 4,600. After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. 2.Flooding 3.Loss of eyesight Outlets What is the most common, non-fatal, electrical shock-related injury? a.Yes, as it is a mobile engine testing station. d. Not checking to make sure that the motor was properly grounded, If the circuit does not turn off when testing the GFCI, the GFCI: If a defective power tool gives you an electric shock, how might your muscles react? 1452 0 obj <> endobj When does electricity become hazardous to humans? Which group would be more accurate when used in an accelerating spaceship? The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. De-energizing Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. Select the correct answer and then click DONE. The floor is covered in water and she is barefoot. b.Ground Fault Critical Interrupter d/E \VZvl$Y#nH,EIm /\"BQ>Rkl6xZWtAgfs 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. Select the correct answer and then click DONE. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. 3. 4.No, because he does not need to use an extension cord. b.Yes, because Bob was on . 5 feet Which of the following can be the result of electric shock? Damaged Extension Cord Leaves Arc Welder Ungrounded: A 29-year-old welder attempted to connect a portable arc welder to an electrical outlet using an extension cord. 0000000816 00000 n Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . 0000414648 00000 n 0000420564 00000 n 0000012360 00000 n The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. 0000004921 00000 n 0000004444 00000 n d.Add more outlets. stream using a 30-amp breaker in a system with 15- or 20-amp receptacles. He plans to use it over a period of at least six months. a) Door or window edges Additional minimum clearance distance is required for power lines carrying over ________. 1. 1.Fingernails 0000002150 00000 n A doubly ionized lithium atom (Li2+,Z=3)\left(\mathrm{Li}^{2+}, \mathrm{Z}=3\right)(Li2+,Z=3) is in n=4n=4n=4 Bohr orbit. BE SAFE! 1452 25 This standard also includes safe work practices for employees performing other work activities that can expose them to electrical hazards as well as safe work practices for the following: (1) Installation of conductors and equipment that connect to the supply of electricity (2) Installations used by the electric utility, such as office . d.Metal, Over half of all deaths caused by electricity result from contact with ________. Look for overhead power lines and buried power line indicators. Work performed on an electrical system within reaching distance of energized components is_____work. 0000007694 00000 n 1.The humidity of the environment It's okay to use extension cords with worn insulation, as . Using cords or tools with worn insulation or exposed wires. b. Frequently inspect electrical systems to insure that the path to ground is continuous. The workers had removed their shirts and were sweating. What is the minimum clearance distance you must maintain from the power lines? BIOLOGICAL HAZARDS: term effects) and strain (longAssociated with working with animals, people, or infectious plant materials. <> Draw a line from the item on the left that corresponds to the match on the right. 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. Ground all power supply systems, electrical circuits, and electrical equipment. Select the correct answer and then click DONE. An examination revealed that the spring, cover plate, and part of the melamine casing were missing from the face of the female connector (the spring and some melamine fragments were found at the accident site). The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. A) 120v . Should Ajay use a GFCI? Select the correct answer and then click DONE. What three things must be present for a current to flow through a conductor. Extension cords are used to: 0000420277 00000 n Arc Flash. Select the correct answer and then click DONE. gYpV:+ <>>> b.Electrical tools High humidity 0000056642 00000 n %PDF-1.4 % 4.Running through doorways. OSHA 10 General Industry Topic Exams Answer Key TOPIC EXAM 1: INTRO TO OSHA 1. The ground wire was not attached on the male end of the cord's plug. 3. 1.A source of electrical current to flow. Additionally, the ground prong was missing and there was no GFCI protection. Be sure equipment that has been shop fabricated or altered is in compliance. Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? 0000004884 00000 n 0000024814 00000 n A measure of the energy of motion of the particles in a substance is its _____. Which of the following are insulators of electricity? If a worker has been retaliated against for using their rights, they 2 0 obj <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> DHPP0MHLHIPPXc f2LXL"dgJ:@ ys`llr-shH,Y@Z 23J0a_TXD;X,;&0i,i&f&T8h R/ v`,l. 440!2D9482q={LPXs +( endstream endobj 129 0 obj <> endobj 130 0 obj <> endobj 131 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageB]/ExtGState<>>> endobj 132 0 obj <> endobj 133 0 obj <> endobj 134 0 obj <> endobj 135 0 obj <>stream Match the length from job to outlet. vpfuI)],s b.Metal Does the fall qualify as an electrical accident? <> 0000004793 00000 n s\A0W+ d.50,000 volts. Becoming part of the circuit exposes you to ________, the most dangerous electrical hazard. A 120v. 4.Must be replaced, Always use a GFCI: _5JKy. A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. Quiz: Electrical Hazards. 0000005520 00000 n Get All Answers to OSHA 30 Construction Final Exam. % 0000004273 00000 n OSHA 30 Module 6: Personal Protective Equipme, OSHA 30 - Module 16: Recordkeeping & Reporting, OSHA 30 - Module 18: Safety and Health Progra, OSHA 30 - Module 11: Welding, Cutting and Bra, CRJ 200 Limitations (Official-ish) - MODDED (, SERE 100.2 Level A SERE (J3TA-US1329) (Civili, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, E. Russell Johnston, Ferdinand Beer, Phillip Cornwell. Select the correct answer and then click DONE. Fire A. wrap tape around the damaged spot to prevent electrical shocks. 3.Needs to be reset Muscular contraction and nerve damage occur; death likely. Quiz Question 5: A/an ___________ is a unit of measurement for electrical resistance. a.Extension cords 4.Flex 0 a.Ground Fault Circuit Insulator specifically addresses electrical protective devices. When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. 1.Extension cords 3.Vapor 12 months C. 6 months D. Never Q23. As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. <>>> Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. Question 3: A/an ____________ is a unit of measurement for electrical resistance. 2. Noise, : ________ or heavy perspiration can cause electricity to take an unintended path. [Power Tools]. A co-worker disconnected the power cord to the saw, too late to save the victim. No GFCI's were used. Before work began, the company safety director made sure that insulated line hoses were placed over sections of the the power line near the jobsite and that a safety clearance zone was marked off for arriving cement trucks. -Glass. c.A measurement of electricity Electrical Safety Quiz Electrical safety is an important topic that you and your workers need to know about. 0000001896 00000 n 4. !DP#vr-\DM<6V-2'I5l6)Z@^m=}c3-aUOo6rr V-Y3d6HABmjD $TQCvK*eg&|Y596#H\ He yelled for his co-workers to disconnect the power, which they did.