Co-workers provided CPR, but were unable to revive the victim. Question 3: A/an ____________ is a unit of measurement for electrical resistance. q>NmnLNmb$"Iyx1bD9.~Ll. 1.Pain b.burns. )KL3C?e%Y92$,]^)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'. -Current= the movement of electrical charge. Question 2: Which of the following is NOT a category of electrical burns? As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. Bob is asked to repair some overhead wiring, requiring the use a ladder. =EAn`u!d, |\~Y>ZF( dnLN\2vP6 >sSjgh2:Lmqx#a[G2{h$zW]_:@Lvr)2T:R-/ `&~O4j)>1P*M 5>F:1B.g!AR (See NFPA 70E-2021 Article 130 and OSHA subpart S part . The modification of the plug was not an intended use or prescribed by the manufacturer. OSHA 10 - Exit Routes, Emergency Action Plans, The Analysis and Design of Linear Circuits, Albert J. Rosa, Gregory J. Toussaint, Roland E. Thomas. -Rubber. 1 0 obj c.Guaranteed Fault Circuit Interrupter Which of the following injuries can occur when muscles flex or twitch from an electrical shock? The workers had removed their shirts and were sweating. he most common shock-related injuries are: b.Match the thickness of the extension cord to the thickness of the nail gun's power cord. Apparently, his hand contracted and he was "locked" to the saw. 0000001495 00000 n d.Add more outlets. [Flexible Cords and Power Tools]. 0000004884 00000 n . Use tools and equipment according to the instructions included in their listing, labeling or certification. D. Have an ANSI sticker and an expiration date. When inspecting extension cords, look for: 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. To avoid injury or death, you must understand and recognize hazards. c.Power lines If a worker has been retaliated against for using their rights, they d. 411, You are working with a 10-foot section of a conductive pipe near power lines. Examples Of Electrical Hazards. The floor is covered in water and she is barefoot. 1.Missing or broken path to ground. The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. The victim provided a path to ground and was electrocuted. Protection is lost because it will not trip when the system's load has been exceeded. Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. a.Two-prong plug 4.Circuit breakers, When inspecting power tools, look for: Fire Use only extension cords that are marked with a designation code for hard or extra-hard usage. View Answer Answer: 600v 4 . 2. 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: Take any defective equipment out of service. Lx*jWP# /c2)|]NXqAx>=~'[ If a defective power tool gives you an electric shock, how might your muscles react? 4 0 obj 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. 3.Tears If the insulation on the tool's power cord is damaged and you touch this area while grounded, the electricity will ________. a.A small current To be safe, you must think about your job and plan for hazards. The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. d.A power tool, A GFCI is designed to: 0000007427 00000 n 0000089142 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. 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. What is the most common, non-fatal, electrical shock-related injury? 0000004965 00000 n d/E \VZvl$Y#nH,EIm /\"BQ>Rkl6xZWtAgfs 4. 3. d. No, because an extension cord would not provide enough power. The auger has a one-quarter horsepower motor encased in a metal housing with two handles. 0000108653 00000 n When used on the moon? Use non-conductive wood or fiberglass ladders when working near power lines. 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. Other protective measures include guarding or insulating the lines. 0000001646 00000 n 0000028595 00000 n On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. 4. -Glass. b.Rod If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. A co-worker disconnected the power cord to the saw, too late to save the victim. OSHA: Air Monitoring & Medical Surveillance, WebQuest: Biomes, Ecosystems and Habitats. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. 30 days B. The small electrical current enters his body through his left leg. ZR)!=w|; @uT C0? 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. Hand-operated metal shifting ropes or cables of electric elevators. Use only extension cords that are 3-wire type. 1. %PDF-1.4 % Match the length from job to outlet. a) Ensure overhead power line safety Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. 1. 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 Any cords found not to be marked for hard or extra-hard use, or which have been modified, must be taken out of service immediately. Post warning signs. 3.ack of ground fault protection. Is split Easy to identify 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. 0000057373 00000 n 4. Best Practices with Power Lines 1. 0000002733 00000 n The following are electrical hazards: Shock. One handle has a deadman's switch. 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. 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. 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 can be caused by exposure to an arc flash? Dirk, a 28-year-old mechanic, is performing maintenance on a piece of equipment when he is shocked. b.811 %PDF-1.4 % Question 4: Which of the following is a type of burn caused by electrical hazards? 0000022637 00000 n 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 Call ________ prior to digging to be connected with your local One Call Center to have all underground lines located by the utility company. 0000004444 00000 n @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ 0000001896 00000 n Potential hazards of electricity are preventable if you do which of the following listed below? Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. Question 2: Which of the following are ways . You should? Water Continually audit cords on-site. OSHA Safety and Health Topics Page. OSHA: Air Monitoring & Medical Surveillance, 5 ANO - RETOMANDO ARTIGO, SUBSTANTIVO E ADJE. _5JKy. c.Touching the motor 0000420277 00000 n 0000008392 00000 n The normal wear and tear on extension and flexible cords at your site can loosen or expose wires, creating hazardous conditions. 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. . b.Not wearing insulating shoes or boots when she was handling electrical equipment 3.Loss of eyesight [29 CFR 1926.416(a)(1)]. 0 Gloves used for electrical work must be inspected and tested prior to use, and be certified every: A. d.50,000 volts. 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. 0000001861 00000 n Frequently inspect electrical systems to insure that the path to ground is continuous. 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. 2.Using an aluminum ladder when the possibility exists for contact with electricity. % b. Deductive objects 0000000016 00000 n Draw a line from the item on the left that corresponds to the match on the right. In 2017, there were over ______________ electrical related violations cited by OSHA in the workplace. a) Door or window edges c. Match the color of the tool to the color of the extension cord. One worker, holding the deadman's switch, received a shock from a ground fault in the auger and was knocked back from the machine. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. Select the correct answer and then click DONE. HWMo#7v#h>6,Z4- A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. 0000414648 00000 n Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. 0000021516 00000 n 2.Using extension cords or electrical tools properly. What is the output of the program in Exercise 17, if first = 26 and second = 8? Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! This is action is also known as creating or completing an electrical circuit. g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream d.Metal, Over half of all deaths caused by electricity result from contact with ________. Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. 0000004946 00000 n Improper Use of Extension and Flexible Cords. 4.Cardiac arrest A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. No GFCI's were used. De-energizing 2. Select the correct answer and then click DONE. b) By supplying GFCIs, or ground-fault circuit interrupters A. indoors. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. 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. 1. Cardiac arrest or death - A result of electrical shock. a.Extension cords b.A fast-acting switch monitoring current flow Switch In addition to contact with power lines, the top electrical hazards include: 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Isolating, Power lines may be located underground. Look for overhead power lines and buried power line indicators. 0000110659 00000 n When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. b.30,000 volts Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. 1. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. 2.Loss of muscle control Using multi-receptacle boxes designed to be. % Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. 1.When you are using electricity near water These short objective type questions with answers are very important for competitive exams as well as Board exams. -Falls. The victim was totally deaf in one ear and suffered diminished hearing in the other. Electrical safety quiz answers are given below. a.Ground Fault Circuit Insulator xref 0000419562 00000 n 12 months C. 6 months D. Never Q23. Examples of Equipment That Can Contact Power Lines. Follow manufacturers' recommended testing procedure to insure GFCI is working correctly. 2. 0000002876 00000 n The pole had not been inspected by the city and was not in compliance with code requirements (it was not grounded). Electrical hazards like frayed cords, missing ground pins, improper wiring or the harm that these hazards pose. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. 0000005042 00000 n h|UnH}+i-. a.311 Determine duration, frequency, degree of exposure to hazards and physical stress. Electricity becomes hazardous when it takes an unintended path to complete the ________. Provides information about the hazards that electrical workers may experience as a part of their jobs. Be sure equipment that has been shop fabricated or altered is in compliance. 0000004208 00000 n lb MKS d. heart attacks. Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). d.Adapter, What is a GFCI? d.The body of the power tool. Electric current cannot exist without an unbroken path to and from the conductor. 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. 3.Cramp Question 3: If following lock out/tag out procedures, what step should be taken BEFORE you shut down the equipment? C. near water. Get All Answers to OSHA 30 Construction Final Exam. She has an older drill with a steel housing and a 3-prong plug. Besides personal bodily injury, what other electrical hazards can be found in the workplace? Select the correct answer and then click DONE. [Power Tools]. <> <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 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). This may damage your equipment and cause employee injuries. Using tools and equipment that can contact power lines increases the risk. What three things must be present for a current to flow through a conductor. 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. Electrical Safety Multiple Choice Questions and Answers for competitive exams. Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. :$#k9BPnZ{Qqe/reKy,'ZlB# D. near other electrical equipment. 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. 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. -Damage to internal organs. startxref Most of the hydrides of Group 1A and Group 2A metals are ionic. Additionally, the ground prong was missing and there was no GFCI protection. Latoya is using a mixing motor to mix pool chemicals in a plastic drum. The source of the shocks -- the saw -- was not replaced. a.Yes, as it is a mobile engine testing station. Test your knowledge with our electrical safety quiz below. endobj Visually inspect all electrical equipment before use. 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). A 120v. c.Wood 2.Loose screws OSHA Pros, LLC is an authorized provider of 360 Training, an OSHA-Accepted Provider, offering training and certification courses for NFPA 70E-Standard, and 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. Suppose you could convert the 525525525 Calories in the cheeseburger you ate for lunch into mechanical energy with 100%100 \%100% efficiency and you throw a 0.145kg0.145~\mathrm{kg}0.145kg baseball with the energy contained in the cheeseburger. 0000068035 00000 n 0000420887 00000 n 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. When an electric shock occurs, your muscles may: Select the correct answer and then click DONE. Explosion It is important to note that NFPA 70E is a . Using equipment outdoors that is labeled for use only in dry, indoor locations. Which of the following are insulators of electricity? Dust and more. a.20,000 volts 0000004686 00000 n The first worker knocked the auger off the victim, but saw that the electric cord was wrapped around the victim's thigh. The following references aid in recognizing hazards associated with electrical work. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. |tYny@YE>LkNj4-czZf"Usw>j\sv3fn},>},KeA s (D) None of the above. 0000014257 00000 n Used across walkways. 1.Fingernails Additional minimum clearance distance is required for power lines carrying over ________. 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+ d) All of the above. ( As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. Extension cords may become a trip hazard when: 2.Yes, because he is using a portable power tool. 0000001604 00000 n 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. A worker was removing a metal antenna when it made electrical contact with a 7200-volt power transmission line. Question 2: Which of the following are ways employers must protect their employees on the workplace? Using a dry wood ladder when the possibility exists for contact with electricity. 0000004273 00000 n 4,600. 4.The amount of current, An electrical burn may affect: Select the correct answer and then click DONE. 0000056642 00000 n Select the choices that accurately define the common electrical term. 1.Using a fiberglass ladder when the possibility exists for contact with electricity. endobj OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. A. wrap tape around the damaged spot to prevent electrical shocks. 0000422244 00000 n xb```VVF A10p,``Pp`hhdpn``r`L:[ I,aZ4Knj21 `ny; Ge7t@OrMx)"cx&e:[~J%aUJ\*t 0000004921 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. Ground all exposed metal parts of equipment. 0000000816 00000 n The NEC C. Suggestions 2. B. 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: 0000005716 00000 n a.Shut off power within a fraction of a second When it completes a circuit through the body. vpfuI)],s True. BE SAFE! D 600v. Select the correct answer and then click DONE. %PDF-1.5 Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. Of the following choices, which are frequent electrical hazards 0000003640 00000 n Effective means of controlling power line hazards include: Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. 0000012360 00000 n d.Ground Fault Circuit Interrupter, : Another electrical hazard that can cause injury or death in the workplace is a ________ path to ground. While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. specifically addresses electrical protective devices. 0000010155 00000 n a. 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. When current travels through your body - Definition of electric shock. 2.Is working properly Should he use an extension cord to power it? b+t6W' te+.W_{8u7Dt@1c. Additionally, the ground prongs were missing from the two cords. 1. View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. endobj Regarding hand protection employers should: A. 0000005050 00000 n Remove cords from receptacles by pulling on the plugs, not the cords. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted.