Identify the oxidizing and reducing agents. Frequently inspect electrical systems to insure that the path to ground is continuous. Overview. D. near other electrical equipment. OSHA 10-Hour Safety Course - Electrical Safety Page 5 of 5 Use the three-stage safety model to stay safe: recognize, evaluate, and control hazards. 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. @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. d/E \VZvl$Y#nH,EIm /\"BQ>Rkl6xZWtAgfs 0000108653 00000 n When used on the moon? Quiz Question 7: Which is not an insulator? HWMo#7v#h>6,Z4- 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 Which of the following factors determine how severe an electrical injury might be? Quiz Question 1: Which of the following is not a category of electrical burns? 3. c. Inductive objects B 208v. Study with Quizlet and memorize flashcards containing terms like OSHA's electrical standards are based on: A. ANSI standards B. 4. The victim was totally deaf in one ear and suffered diminished hearing in the other. 1 0 obj Regarding hand protection employers should: A. c. Extend the reach of the power tool. 0000015549 00000 n 3.Draped over equipment. 2. 0000421920 00000 n 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. Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. How fast would the ball be moving at the moment of release? What is the primary purpose of properly grounding equipment? Quiz Question 3: Power cords can be damaged by which of the following? Which of the following are insulators of electricity? Select the correct answer and then click DONE. 2. 0000057373 00000 n Should Ajay use a GFCI? Which of the following are conductor of electricity? 0000427811 00000 n 0000001646 00000 n a.Your thumb. <<7628BB2D46738F42B2FC6393656F4718>]>> 0000005520 00000 n b.Metal Best practices with power lines include: It is important to note that NFPA 70E is a . 0000010603 00000 n %PDF-1.4 % Visually inspect all electrical equipment before use. These short objective type questions with answers are very important for competitive exams as well as Board exams. 0000003413 00000 n Use only extension cords that are marked with a designation code for hard or extra-hard usage. b.The tool's power cord. . 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. (See NFPA 70E-2021 Article 130 and OSHA subpart S part 1910.333 (a) (1)- (2) and (c) for complete details.) 1.The humidity of the environment 0000003771 00000 n Question 1: Which of these is a type of Ground Fault Circuit Adapter? Outlets The factors that determine the severity of an electrical injury include: When inspecting extension cords, look for: 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. Noise, : ________ or heavy perspiration can cause electricity to take an unintended path. . 12 months C. 6 months D. Never Q23. Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. Select the choices that accurately define the common electrical term. b.Yes, because Bob was on . 0000007741 00000 n 2 0 obj c.Three-prong plug True. 0000110659 00000 n On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. 5.Twitch, Electrical shock may result in: stream 128 0 obj <> endobj xref 128 26 0000000016 00000 n 4.No, because he does not need to use an extension cord. Best Practices with Power Lines 1. Be sure equipment that has been shop fabricated or altered is in compliance. 0000001604 00000 n Death. The workers administered CPR to the victim, but to no avail. 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. trailer (B) Switch sticks. What do tripped circuit breakers and blown fuses indicate? 4.Organs, The presence of ________ can turn you, your equipment, or insulators like wood into conductors. Question 1: Which of the following is a danger of electricity? a. c.The outlet. Lx*jWP# /c2)|]NXqAx>=~'[ 1452 25 0000004274 00000 n How might this event affect the ability of animals to obtain energy to live? 0000028595 00000 n Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. 0000007116 00000 n One handle has a deadman's switch. 0000068035 00000 n A) 120v . gYpV:+ d.Adapter, What is a GFCI? 0000004946 00000 n [Power Tools]. Check your employee's electrical safety knowledge through an electrical safety quiz. When it completes a circuit through the body. 0000004686 00000 n Suppose a volcano threw so much ash into the air that it blocked much of the sunlight. Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. a.Electricity b. -Severe skin burns. [, Use all equipment according to the manufacturer's instructions. He yelled for his co-workers to disconnect the power, which they did. Provides information about the hazards that electrical workers may experience as a part of their jobs. 0000002733 00000 n 3. 3. 0000422244 00000 n To avoid injury or death, you must understand and recognize hazards. c.40,000 volts When an electric shock occurs, your muscles may: [29 CFR 1926.416(a)(1)]. a.Conductive objects 0000004273 00000 n Fatal electrocution is the main risk, but burns and falls from elevations are also hazards. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. OSHA Safety and Health Topics Page. startxref 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. -Voltage= a measure of electrical force. 1452 0 obj <> endobj b) By supplying GFCIs, or ground-fault circuit interrupters 3.Cramp The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. 0000002122 00000 n 3.When you are using portable power tools Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. Electrical Hazards Electrical hazards can be found in nearly every roofing work site. 0000108920 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. <> View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. Potential hazards of electricity are preventable if you do which of the following listed below? After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. 5. Apparently, his hand contracted and he was "locked" to the saw. 0000010155 00000 n -Glass. Additionally, the ground prong was missing and there was no GFCI protection. Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). b.Shut off power within five minutes of the imbalance Explain the purpose and use of the MyPlate symbol. 4. 3.Clear 2. Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. The most dangerous place to use electrical equipment is? c.Wood A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. Burns. BIOLOGICAL HAZARDS: term effects) and strain (longAssociated with working with animals, people, or infectious plant materials. Question 1: Each year, approximately __________ workers suffer from electricity related injuries. The auger then fell across the other worker, the 24-year-old victim. 3.Loose nuts The normal wear and tear on extension and flexible cords at your site can loosen or expose wires, creating hazardous conditions. Looking for NFPA 70E Certification? 1.Extension cords a.20,000 volts D 600v. Using cords or tools with worn insulation or exposed wires. c) Establish and enact an assured equipment grounding conductor program (AEGCP) 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 The following are electrical hazards: Shock. Call ________ prior to digging to be connected with your local One Call Center to have all underground lines located by the utility company. What is the minimum clearance distance you must maintain from the power lines? 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. Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. Which of the following can be caused by exposure to an arc flash? You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. 0000421627 00000 n 0000007427 00000 n True. 1. Power was supplied through two extension cords from a nearby residence. b.A fast-acting switch monitoring current flow Extension cords are used to: q>NmnLNmb$"Iyx1bD9.~Ll. Select the correct answer and then click DONE. 1. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 0000013999 00000 n I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB 0000001495 00000 n 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! 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. a.Shut off power within a fraction of a second 2.Loss of muscle control endobj Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. 0000419562 00000 n 2.Is working properly d. Match the outlet prongs to the extension cord. Carly needs to use an extension cord with her corded nail gun. 0 0000002385 00000 n d. No, because an extension cord would not provide enough power. 3.No, because he will not be touching any grounded material when using the tool. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Freeze 1. 3.Something that causes current to flow through the . 3. Question 4: Which of the following is a type of burn caused by electrical hazards? Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. 2. Select the correct answer and then click DONE. 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. c.Gasoline 2. 0000002150 00000 n The router's 3-wire power cord was spliced to a 2-wire cord and plug set which was not rated for hard service. endobj A measure of the energy of motion of the particles in a substance is its _____. b.Ground Fault Critical Interrupter (C) Hot sticks. trailer <]/Prev 500768/XRefStm 1495>> startxref 0 %%EOF 222 0 obj <>stream b) Staples b.Electrical tools b.Yes, as it would be too expensive to install more permanent wiring and receptacles. OSHA will keep all identities confidential. -Rubber. 1.Clench Extension cords had poor splices, no grounds, and reversed polarity. 3.Needs to be reset endobj 4,600. gYpV:+ Electrical current travels through insulated ________. %PDF-1.4 % b.Not wearing insulating shoes or boots when she was handling electrical equipment The source of the shocks -- the saw -- was not replaced. SCENARIO: You encounter a co-worker on a residential remodeling job. Which of the following are caused by contact with electricity? stream Which of the following can be the result of electric shock? [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. Question 3: Employers are not required to enforce lock out/tag out practices in the workplaces. Then answer the questions below. Question 2: Which of the following are ways employers must protect their employees on the workplace? trailer <<11AC4BACEBCA4B32A885F1120BD3A307>]>> startxref 0 %%EOF 153 0 obj <>stream 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. The ground wire was not attached on the male end of the cord's plug. 0000013716 00000 n d.Water, Other electrical hazards in the workplace include: Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. You need to evaluate the situation you are in and assess your . The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. Switch 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. 1.Pain A) Identify; Castigate; C) Evaluate; D) Modify; 3. d) All of the above. ( 182 0 obj <> endobj xref 182 41 0000000016 00000 n [, Do not modify cords or use them incorrectly. What was Latoya's first mistake? 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. 1. Is split Using modified cords or tools, e.g., removing ground prongs, face plates, insulation, etc. Does the fall qualify as an electrical accident? 0000012360 00000 n Exercise their rights under the law without retaliation, including reporting an injury or raising health and safety concerns with their employer or OSHA. 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. a.Yes, as it is a mobile engine testing station. Quiz Question 5: A/an ___________ is a unit of measurement for electrical resistance. specifically addresses electrical protective devices. c.Absorb any water around the area Additional minimum clearance distance is required for power lines carrying over ________. Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . In which of the following workplace situations are you at risk for coming into contact with live electrical . A 29-year-old worker was electrocuted when he pushed a crane cable into a 7,200-volt power line. (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. 0000002386 00000 n 2.The person's physical condition RZyd Electrical Safety Multiple Choice Questions and Answers for competitive exams. Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? B. outdoors. H. d. Power outlets, ________ are anything that can transmit electrical current. 3 0 obj OSHA 29 CFR 1910, Subpart P . d. 411, You are working with a 10-foot section of a conductive pipe near power lines. Underground electrical hazards are: A. Question 3: A/an ____________ is a unit of measurement for electrical resistance. 2.Using extension cords or electrical tools properly. Intentionally creating a low-resistance path that connects to the earth. Electricity becomes hazardous when it takes an unintended path to complete the ________. Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. Select the correct answer and then click DONE. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. 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 1,[-c|"&u[Fu>wjte8j:xRk )"m_!6awT J,byp?fRBf?p|b3/Um\7"|+@5vvWAa5J^y*q,l b)Ftt4 :4,-J`! <> 4. Muscular contraction and nerve damage occur; death likely. Select the correct answer and then click DONE. Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. Electrocution. 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. Is not broken, Question Text: Electrical tools should be grounded with a(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. When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. 5>vB35Plm$\4{U[lU`t~.vJGmFO^@+ cGPzNY*oS(m%q{Agp 0000001116 00000 n 4.Dirt build-up, Use only approved and authorized power tools in areas where the following hazards may be present: Use only extension cords that are 3-wire type. c.Power lines qnde>9!.,T2 :hw5 #OaPxkx=y7]J-yv*'H$jmVCq$ sx:R2$9SY+D!!LJ:n+.\#Hu~2VI O? B. 1.Is firmly connected 0000005734 00000 n Most of the hydrides of Group 1A and Group 2A metals are ionic. a. Gaseous matter 2 0 obj 4.Must be replaced, Always use a GFCI: Use only equipment that is approved to meet OSHA standards. 3 0 obj Select the choices that accurately define the common electrical term. 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. 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. Stay at least 10 feet away from overhead power lines. Test your knowledge with our electrical safety quiz below. a.Yes, because the electrical shock caused the fall. 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: Ajay needs to use a dewatering pump to drain standing water on a construction site. The contact lasts for 5 seconds before someone is able to shut off the power. Effective means of controlling power line hazards include: 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. 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. Take any defective equipment out of service. 0000005716 00000 n *Effects are for voltages less than about 600 volts. Match the length from job to outlet. 1. Select the correct answer and then click DONE. d.Ground Fault Circuit Interrupter, : Another electrical hazard that can cause injury or death in the workplace is a ________ path to ground. d.Add more outlets. Ground all exposed metal parts of equipment. OSHA: Air Monitoring & Medical Surveillance, 5 ANO - RETOMANDO ARTIGO, SUBSTANTIVO E ADJE. Cardiac arrest or death - A result of electrical shock. Get All Answers to OSHA 30 Construction Final Exam. The NEC C. Suggestions 4. [. 0000002479 00000 n Electrical Contractors Industry. 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 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+ s\A0W+ If a worker has been retaliated against for using their rights, they 0000017163 00000 n Electrical safety quiz answers are given below. If you are touching any grounded material while using a power tool d) All of the above. In 2017, there were over ______________ electrical related violations cited by OSHA in the workplace. C. near water. 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. Using the wrong light bulb wattage; Overloading power strips and outlets; Unprotected electrical outlets; Poor wiring; Defective electrical wires D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. xb```VVF A10p,``Pp`hhdpn``r`L:[ I,aZ4Knj21 `ny; Ge7t@OrMx)"cx&e:[~J%aUJ\*t b.30,000 volts 0000012944 00000 n Death is probable. It's okay to use extension cords with worn insulation, as . 3.Body tissue [Flexible Cords and Power Tools]. Easy to identify 0000002876 00000 n A co-worker disconnected the power cord to the saw, too late to save the victim. 0000003640 00000 n ZR)!=w|; @uT C0? <> The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. a.Standing in water If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. 2.Complete The following references aid in recognizing hazards associated with electrical work. 0000003254 00000 n Using a dry wood ladder when the possibility exists for contact with electricity. Becoming part of the circuit exposes you to ________, the most dangerous electrical hazard. endobj 0000001731 00000 n To be safe, you must think about your job and plan for hazards. 4.Cardiac arrest b+t6W' te+.W_{8u7Dt@1c. Select the correct answer and then click DONE. 0000414648 00000 n Select the correct answer and then click DONE. Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? d. 20 feet. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. 2.Yes, because he is using a portable power tool. No GFCI's were used. 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.Extension cords 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. 0000004444 00000 n Post warning signs. 3.ack of ground fault protection. Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. 2.Loose bolts Wearing a baseball cap 1. Short Confined spaces Machinery-related hazards (lockout/tagout, boiler safety, forklifts, etc.) What factors determine the severity of Dirk's injuries? The victim provided a path to ground and was electrocuted. Which of the following part of you body can burn if you come in contact with electricity? 0000001896 00000 n
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