(b) The same reaction can also be classified as a redox reaction. 0000002150 00000 n 0000420887 00000 n A co-worker disconnected the power cord to the saw, too late to save the victim. % How might this event affect the ability of animals to obtain energy to live? The length of time the body is in the circuit, in contact with electricity - Factor determining the severity of an electrical . c. No, because the electricity is needed on a long-term basis. Cardiac arrest or death - A result of electrical shock. 2.Loose bolts Working with electricity can be dangerous. Best practices with power lines include: 0000006866 00000 n Quiz Question 3: Power cords can be damaged by which of the following? Using modified cords or tools, e.g., removing ground prongs, face plates, insulation, etc. View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. 0000057373 00000 n b. Deductive objects Stay at least 10 feet away from overhead power lines. trailer <]/Prev 500768/XRefStm 1495>> startxref 0 %%EOF 222 0 obj <>stream To avoid injury or death, you must understand and recognize hazards. 4,600. 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. 0000003413 00000 n Visually inspect all electrical equipment before use. 1. 0000004444 00000 n Protection is lost because it will not trip when the system's load has been exceeded. Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. a.Electricity 0000421627 00000 n -Conductor= permits the free flow of electricity. A. wrap tape around the damaged spot to prevent electrical shocks. 0000002385 00000 n a.Ground Fault Circuit Insulator 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). 4.Must be replaced, Always use a GFCI: 3.ack of ground fault protection. When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. 3.Maintaining a safe distance of at least 10 feet from all overhead power lines. 0000007694 00000 n The first worker knocked the auger off the victim, but saw that the electric cord was wrapped around the victim's thigh. [29 CFR 1926.416(a)(1)]. a.Yes, because the electrical shock caused the fall. The auger has a one-quarter horsepower motor encased in a metal housing with two handles. 0000005734 00000 n When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. The following are electrical hazards: Shock. 0000108653 00000 n Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. Freeze xYmo -ER/&@[D,_! The contact lasts for 5 seconds before someone is able to shut off the power. 1 0 obj 1. [Power Tools]. These short objective type questions with answers are very important for competitive exams as well as Board exams. 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? Using cords or tools with worn insulation or exposed wires. 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. Get resources on specific hazards and their control, including identification, risk assessment and inspections, to keep your workplace healthy and safe. 0000002403 00000 n Electrical safety quiz answers are given below. Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. 2.Loose screws %PDF-1.5 BE SAFE! a) Ensure overhead power line safety Power was supplied through two extension cords from a nearby residence. Question 1: Which of the following is a danger of electricity? Overview. The floor is covered in water and she is barefoot. 0000009628 00000 n Provides information about the hazards that electrical workers may experience as a part of their jobs. 0000420277 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. 0000014257 00000 n 0000000816 00000 n 3. 2. *Effects are for voltages less than about 600 volts. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. 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. 0000001731 00000 n Should he use an extension cord to power it? Metal partitions, grill work, and similar metal enclosures around equipment of over 1kV between conductors. Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. 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 . )KL3C?e%Y92$,]^)kmR/!8\ JF N'bT\U1+tc+&:'ZuGi!UeUrE [?CrU.&|#@Ed,=2UF]r/n/{v-;v>%/~;[*AxBU,-#!uyFGR,Wv[ cOzObnZfI4ob:pf "~ .iBE@mOs:Os5U9cnU` Vd"F'4Bm?>}hyRQyrX0U026h7#L'. Question 3: A/an ____________ is a unit of measurement for electrical resistance. 0000004273 00000 n hbb``b``3N0  endstream endobj 183 0 obj <>/Metadata 28 0 R/Names 184 0 R/Outlines 23 0 R/Pages 27 0 R/StructTreeRoot 30 0 R/Type/Catalog/ViewerPreferences<>>> endobj 184 0 obj <> endobj 185 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 186 0 obj <> endobj 187 0 obj <> endobj 188 0 obj <>stream 0000002557 00000 n _.9u'2G_0 Ue]e"x5|Y One hand drill was not grounded, and the other had no safety plate. 0000007464 00000 n 1.The humidity of the environment hazard or that their employer is not following OSHA's rules. a.Conductive objects Select the correct answer and then click DONE. 2. Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. Only after a rescue squad arrived about 4 minutes later did anyone realize that the crane was in contact with a power line -- all those present had assumed that the victim had suffered a heart attack. H\n@0vj@/R#tnvihavopnS1>v8Z6zLpOCRU.O^6pImjgk{xv6%zp\,{|7_WqNfhu09$U?kW}: }y}]OIL5~W*8D~%W-yww;sORYbfspA.%YJV L%=Kx&0W+ 1.A source of electrical current to flow. Select the correct answer and then click DONE. He may have dropped the extension cord at the site and not heard the connector break. 4.Circuit breakers, When inspecting power tools, look for: Quiz Question 4: Which is a preventive measure to prevent hazards while working with power lines? 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. 0000419562 00000 n Look for overhead power lines and buried power line indicators. 0000000816 00000 n 0000001896 00000 n Additionally, the ground prong was missing and there was no GFCI protection. D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. 0000108920 00000 n Select the correct answer and then click DONE. <<7628BB2D46738F42B2FC6393656F4718>]>> d) All of the above. Select the correct answer and then click DONE. (D) None of the above. b.burns. OSHA 29 CFR 1910.147 . 1452 25 Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. b.Ground Fault Critical Interrupter 1.Using a fiberglass ladder when the possibility exists for contact with electricity. d.Water, Other electrical hazards in the workplace include: 0000002733 00000 n Burns. 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: c.911 The pole had not been inspected by the city and was not in compliance with code requirements (it was not grounded). 1.When you are using electricity near water Electrocution. 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. 0000005632 00000 n Which group would be more accurate when used in an accelerating spaceship? b.Yes, because Bob was on . 3.Tears This caused him to fall from the ladder and land in a puddle of water, still holding the saw. 0000002122 00000 n 0000001604 00000 n Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. Safe operation of hand and portable powered tools and other hand-held equipment. 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. 0000427811 00000 n Which of the following can be the result of electric shock? Get All Answers to OSHA 30 Construction Final Exam. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? De-energizing [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. 2.Complete Electric current cannot exist without an unbroken path to and from the conductor. %PDF-1.5 Explosion Question 2: Which of the following is NOT a category of electrical burns? 1. 2.Skin 0000003603 00000 n %%EOF 2. 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! 12 months C. 6 months D. Never Q23. HWMo#7v#h>6,Z4- Select the correct answer and then click DONE. Work performed on an electrical system within reaching distance of energized components is_____work. 0000011060 00000 n Fire Draw a line from the item on the left that corresponds to the match on the right. q>NmnLNmb$"Iyx1bD9.~Ll. (E) a, b, and c. 2. 1.Extension cords Suppose you could convert the 525525525 Calories in the cheeseburger you ate for lunch into mechanical energy with 100%100 \%100% efficiency and you throw a 0.145kg0.145~\mathrm{kg}0.145kg baseball with the energy contained in the cheeseburger. Frames of non-electrically driven elevator cars to which electric conductors are attached. qnde>9!.,T2 :hw5 #OaPxkx=y7]J-yv*'H$jmVCq$ sx:R2$9SY+D!!LJ:n+.\#Hu~2VI O? Bob is asked to repair some overhead wiring, requiring the use a ladder. d.50,000 volts. 5. As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. It is important to note that NFPA 70E is a . Best Practices with Power Lines 1. 1,[-c|"&u[Fu>wjte8j:xRk )"m_!6awT J,byp?fRBf?p|b3/Um\7"|+@5vvWAa5J^y*q,l b)Ftt4 :4,-J`! The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. 5>vB35Plm$\4{U[lU`t~.vJGmFO^@+ cGPzNY*oS(m%q{Agp a.311 1. g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream Quiz Question 1: Which of the following is not a category of electrical burns? Regarding hand protection employers should: A. Select the choices that accurately define the common electrical term. Select the correct answer and then click DONE. Should Ajay use a GFCI? [. Effective means of controlling power line hazards include: 1.Is firmly connected 2 0 obj 1.Cuts 2.Yes, because he is using a portable power tool. 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. 2. Using multi-receptacle boxes designed to be. 1.Is faulty 3.Loss of eyesight d. Match the outlet prongs to the extension cord. Using tools and equipment that can contact power lines increases the risk. Carly needs to use an extension cord with her corded nail gun. (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. Which of the following are caused by contact with electricity? Select the correct answer and then click DONE. trailer Electrical Hazards Electrical hazards can be found in nearly every roofing work site. I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB a.Two-prong plug The modification of the plug was not an intended use or prescribed by the manufacturer. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> -Falls. Explosion. -Voltage= a measure of electrical force.