The following references aid in recognizing hazards associated with electrical work. Using modified cords or tools, e.g., removing ground prongs, face plates, insulation, etc. She finds several available in the shop. As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. hb``b``=p0X8n0lY0L#rK[V26h* @0H!XDl+!&FfUfo`h6l The accident site was wet; also, humidity was high and the victim was sweating. a.Supply power for tools or equipment on a temporary or short-term basis. Stay at least 10 feet away from overhead power lines. [Flexible Cords and Power Tools]. Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. 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. a.311 A worker was removing a metal antenna when it made electrical contact with a 7200-volt power transmission line. Noise, : ________ or heavy perspiration can cause electricity to take an unintended path. a.Shut off power within a fraction of a second 0000004686 00000 n Hand-operated metal shifting ropes or cables of electric elevators. Which of the following can be the result of electric shock? :$#k9BPnZ{Qqe/reKy,'ZlB# 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. c.Wood Check your employee's electrical safety knowledge through an electrical safety quiz. 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. 1 0 obj b. 5.Twitch, Electrical shock may result in: Which of the following are insulators of electricity? 1.A source of electrical current to flow. 2.Skin 3.Clear Fire 2. If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. The NEC C. Suggestions 3. OSHA will keep all identities confidential. 3.Tears Regarding hand protection employers should: A. 0000055319 00000 n When it completes a circuit through the body. Select the correct answer and then click DONE. De-energize and ground lines when working near them. c. Match the color of the tool to the color of the extension cord. Ground all power supply systems, electrical circuits, and electrical equipment. 2. D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. Select the correct answer and then click DONE. Explosion <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? 1.Damaged cover or insulation 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. One handle has a deadman's switch. 1.Clench Used across walkways. In which of the following workplace situations are you at risk for coming into contact with live electrical . gYpV:+ OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. -Conductor= permits the free flow of electricity. Working with electricity can be dangerous. Question 1: Each year, approximately __________ workers suffer from electricity related injuries. Select the correct answer and then click DONE. The first worker knocked the auger off the victim, but saw that the electric cord was wrapped around the victim's thigh. -Current= the movement of electrical charge. 0000006866 00000 n 0000003413 00000 n Call ________ prior to digging to be connected with your local One Call Center to have all underground lines located by the utility company. 5 feet This is action is also known as creating or completing an electrical circuit. It is important to note that NFPA 70E is a . Safe operation of hand and portable powered tools and other hand-held equipment. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. HWMo#7v#h>6,Z4- a.Your thumb. 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. [Flexible Cords] Cords that are not 3-wire type, not designed for hard-usage, or that have been modified, increase your risk of contacting electrical current. OSHA 10 General Industry Test Answer Key WALKING. (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. 0000017336 00000 n Gloves used for electrical work must be inspected and tested prior to use, and be certified every: A. Switch b. Deductive objects The workers administered CPR to the victim, but to no avail. <<7628BB2D46738F42B2FC6393656F4718>]>> 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. As she is adding in the chemicals, her hand touches the motor and it becomes energized. 3 0 obj Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. 2.Is working properly A Safety Electrical One Line Diagram should be used to _____ all sources of electrical energy. 1) The _____ created the Occupational Safety and Health Administration (OSHA) to set and enforce protective workplace safety and health standards. 0 Lx*jWP# /c2)|]NXqAx>=~'[ Determine duration, frequency, degree of exposure to hazards and physical stress. 2.Loose bolts Looking for NFPA 70E Certification? The auger has a one-quarter horsepower motor encased in a metal housing with two handles. When does electricity become hazardous to humans? Which of the following factors determine how severe an electrical injury might be? To be safe, you must think about your job and plan for hazards. The power switch on the welder was already in the "on" position, and the female end of the extension cord, which was spring loaded, had apparently been dropped and broken. 1.Missing In addition to contact with power lines, the top electrical hazards include: Quiz Question 4: Which is a preventive measure to prevent hazards while working with power lines? 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. -Wood. Quiz Question 1: Which of the following is not a category of electrical burns? Ajay needs to use a dewatering pump to drain standing water on a construction site. 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 0000002403 00000 n _5JKy. Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. Is not broken, Question Text: Electrical tools should be grounded with a(n)________. 0000003603 00000 n 0000002122 00000 n -Grounding= a conductive connection to the earth which acts as a protective measure. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. Electrical hazards are life threatening incidents that could happen due to electricity. Select the choices that accurately define the common electrical term. Question 3: If following lock out/tag out procedures, what step should be taken BEFORE you shut down the equipment? Intentionally creating a low-resistance path that connects to the earth. Dust One worker, holding the deadman's switch, received a shock from a ground fault in the auger and was knocked back from the machine. If a worker has been retaliated against for using their rights, they How will she choose the correct cord? Electrical Safety Multiple Choice Questions and Answers for competitive exams. 0000420277 00000 n 0000000816 00000 n Quiz Question 10: Ground-fault circuit interrupters must be used for all of the following except? Effective means of controlling power line hazards include: 2.Loss of muscle control [29 CFR 1926.416(a)(1)]. 2.Using an aluminum ladder when the possibility exists for contact with electricity. C. near water. You discover the electrical cord on a drill has been damaged and some of the cord's insulation is missing. Before using the equipment, be sure that the ground wire: 1.Cuts 3.Needs to be reset Carly needs to use an extension cord with her corded nail gun. The most dangerous place to use electrical equipment is? d.A power tool, A GFCI is designed to: =EAn`u!d, |\~Y>ZF( dnLN\2vP6 >sSjgh2:Lmqx#a[G2{h$zW]_:@Lvr)2T:R-/ `&~O4j)>1P*M 5>F:1B.g!AR 0000018681 00000 n OSHA 30 Module 6: Personal Protective Equipme, OSHA 30 - Module 16: Recordkeeping & Reporting, OSHA 30 - Module 18: Safety and Health Progra, OSHA 30 - Module 11: Welding, Cutting and Bra, CRJ 200 Limitations (Official-ish) - MODDED (, SERE 100.2 Level A SERE (J3TA-US1329) (Civili, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, E. Russell Johnston, Ferdinand Beer, Phillip Cornwell. 1. 2. 4. OSHA: Air Monitoring & Medical Surveillance, WebQuest: Biomes, Ecosystems and Habitats. Equipment used in manner prescribed. Water He yelled for his co-workers to disconnect the power, which they did. There are many types of hazards - chemical, ergonomic, physical, and psychosocial, to name a few - which can cause harm or adverse effects in the workplace. q>NmnLNmb$"Iyx1bD9.~Ll. 0000001116 00000 n @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream <> 2.Grounding x=k6S *ywvkDyb_w rg&@Q5/^4O_~w/]7[xqs7Zt?LK-,>W\W`Mb?n8\.vpOJA7~5R%.oJd|Bbv7biQH%^~C=m3_ov{8] }C.Se={o7H[w@/^j BgXRC/O/eiLHiN\4~7x=^J@|]zu"x]lQ-+.xF=oY +B?jSl|(agF_].+UH\!/;AU .cG!h@42 iqnkZtdc#^)AX96(wFZ,RP{[\j\aJgc) diV;BNzZge(}=0Pj Qp@"]yOnNw89 Best practices with power lines include: )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'. OSHA Safety and Health Topics Page. Electric current cannot exist without an unbroken path to and from the conductor. Does the fall qualify as an electrical accident? What is the output of the program in Exercise 17, if first = 26 and second = 8? -Falls. Quiz Question 3: Power cords can be damaged by which of the following? The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. Question 2: Which of the following is NOT a category of electrical burns? Underground electrical hazards are: A. h|UnH}+i-. 4.Running through doorways. Select the correct answer and then click DONE. 3.Body tissue Draw a line from the item on the left that corresponds to the match on the right. d. 20 feet. gYpV:+ b.Electrical tools 2 0 obj Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. %%EOF When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. Best Practices with Power Lines 1. Extension cords had poor splices, no grounds, and reversed polarity. 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. What factors determine the severity of Dirk's injuries? Is not painted over 4.Circuit breakers, When inspecting power tools, look for: 1.Flammable liquids The victim was part of a crew that was constructing a concrete wall. 0000005520 00000 n SECTION #4 | Participant Guide 2 Electrical Safety mELECTRICAL SAFETYm mACTIVITY 1 - GROUNDINGm In your small group, read fact sheets A and B, and the following scenario. 1. c.911 The ________ keeps the electricity on its intended path through the conductor. OSHA 10 General Industry Topic Exams Answer Key TOPIC EXAM 1: INTRO TO OSHA 1. Use non-conductive wood or fiberglass ladders when working near power lines. %PDF-1.4 % 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. Using tools and equipment that can contact power lines increases the risk. 0000007427 00000 n Explain the purpose and use of the MyPlate symbol. (C) Hot sticks. Use only extension cords that are 3-wire type. OSHA 29 CFR 1910, Subpart P . A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. D. near other electrical equipment. stream The workers had removed their shirts and were sweating. When current travels through your body - Definition of electric shock. b.10 feet Death. 0000003771 00000 n A) 120v . Select the correct answer and then click DONE. 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. trailer % b.Metal Follow manufacturers' recommended testing procedure to insure GFCI is working correctly. Should Ajay use a GFCI? d) All of the above. Additionally, the ground prongs were missing from the two cords. 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. 1452 25 1.The humidity of the environment Select the correct answer and then click DONE. c.A measurement of electricity 0000421920 00000 n ZR)!=w|; @uT C0? Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. Overview. Using multi-receptacle boxes designed to be. Bob is asked to repair some overhead wiring, requiring the use a ladder. Which group would be more accurate when used in an accelerating spaceship? No GFCI's were used. Continually audit cords on-site. 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 . Fatal electrocution is the main risk, but burns and falls from elevations are also hazards. ( Visually inspect all electrical equipment before use. d.Adapter, What is a GFCI? Co-workers provided CPR, but were unable to revive the victim. Using cords or tools with worn insulation or exposed wires. 0000006893 00000 n 0000414648 00000 n x_HSqnwmky54YLzeStJi# TZObFT*.#BQF/Q 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. Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). 4.The amount of current, An electrical burn may affect: The modification of the plug was not an intended use or prescribed by the manufacturer. The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. C 277v. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 0000021516 00000 n 1.Fingernails Quiz Question 7: Which is not an insulator? 0000005042 00000 n 0000000016 00000 n The pole had not been inspected by the city and was not in compliance with code requirements (it was not grounded). 4.Dirt build-up, Use only approved and authorized power tools in areas where the following hazards may be present: 0000001814 00000 n (b) The same reaction can also be classified as a redox reaction. b.Match the thickness of the extension cord to the thickness of the nail gun's power cord. Test your knowledge with our electrical safety quiz below. Use only extension cords that are marked with a designation code for hard or extra-hard usage. 0000422244 00000 n If you are touching any grounded material while using a power tool <>>> a.Yes, as it is a mobile engine testing station. [Power Tools]. 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? The contact lasts for 5 seconds before someone is able to shut off the power. 0000009628 00000 n 3.Loose nuts Is split Visually inspect all electrical equipment before use. After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. Use only equipment that is approved to meet OSHA standards. This may damage your equipment and cause employee injuries. c.15 feet An OSHA inspection revealed that the tool's original power cord had been replaced with a flat cord, which was not designated for hard service, and that strain relief was not provided at the point where the cord entered the tool. 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). Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . 0000024814 00000 n using a 30-amp breaker in a system with 15- or 20-amp receptacles. 0000001861 00000 n 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 0000003900 00000 n 1.Using a fiberglass ladder when the possibility exists for contact with electricity. 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. a) Door or window edges xref How fast would the ball be moving at the moment of release? 0000003715 00000 n 1 0 obj 0000000816 00000 n 1. Power was supplied through two extension cords from a nearby residence. Select the correct answer and then click DONE. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. 0000005050 00000 n A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. Is the west coast of Africa a plate boundary? 2.Flooding The victim was totally deaf in one ear and suffered diminished hearing in the other. He plans to use it over a period of at least six months. 0000004884 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. 1. 0000421627 00000 n 1. 0000003640 00000 n The length of time the body is in the circuit, in contact with electricity - Factor determining the severity of an electrical . (D) None of the above. 1,[-c|"&u[Fu>wjte8j:xRk )"m_!6awT J,byp?fRBf?p|b3/Um\7"|+@5vvWAa5J^y*q,l b)Ftt4 :4,-J`! 3.The length of time the body is in contact with electricity 2.Loose screws The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. Electricity becomes hazardous when it takes an unintended path to complete the ________. Quiz Question 2: Which is acceptable when using powdered tools? Electrical Contractors Industry. (See NFPA 70E-2021 Article 130 and OSHA subpart S part 1910.333 (a) (1)- (2) and (c) for complete details.) 0000004965 00000 n I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB 0000004273 00000 n d. heart attacks. 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! Frequently inspect electrical systems to insure that the path to ground is continuous. 4.Damaged cover or insulation, When using electric-powered hand tools, do not overload: 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. Exercise their rights under the law without retaliation, including reporting an injury or raising health and safety concerns with their employer or OSHA. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . Yes, because he will be using electricity near water. 128 0 obj <> endobj xref 128 26 0000000016 00000 n 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. 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. Apply a warning tag to any defective tool and do not use it until the problem has been corrected. Which of the following injuries can occur when muscles flex or twitch from an electrical shock? When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. Short Confined spaces Machinery-related hazards (lockout/tagout, boiler safety, forklifts, etc.) 4. d.Metal, Over half of all deaths caused by electricity result from contact with ________. Draw a line from the item on the left that corresponds to the match on the right. 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. . The normal wear and tear on extension and flexible cords at your site can loosen or expose wires, creating hazardous conditions. Use tools and equipment according to the instructions included in their listing, labeling or certification. a.Standing in water (3,2,1), (5,4,3). 1. When inspecting extension cords, look for: These short objective type questions with answers are very important for competitive exams as well as Board exams. True. 0000004946 00000 n 0000420564 00000 n -Glass. A. indoors. 0000014257 00000 n SCENARIO: You encounter a co-worker on a residential remodeling job. 0000001731 00000 n Select the correct answer and then click DONE. 0000057373 00000 n 0000010155 00000 n The floor is covered in water and she is barefoot. [Flexible Cords and Power Tools] If there is no ground-fault protection, these can cause a ground-fault that sends current through the worker's body, resulting in electrical burns, explosions, fire, or death. b+t6W' te+.W_{8u7Dt@1c. b.811 d.Add more outlets. d.Water, Other electrical hazards in the workplace include: