Extension cords are used to: Use only extension cords that are marked with a designation code for hard or extra-hard usage. Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. Which of the following are caused by contact with electricity? Quiz Question 3: Power cords can be damaged by which of the following? (See NFPA 70E-2021 Article 130 and OSHA subpart S part . A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. c) Establish and enact an assured equipment grounding conductor program (AEGCP) 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. 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. Of the following choices, which are frequent electrical hazards 5. Visually inspect all electrical equipment before use. How might this event affect the ability of animals to obtain energy to live? 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! ( Which group would be more accurate when used in an accelerating spaceship? 30 days B. c) Age %PDF-1.4 % -Current= the movement of electrical charge. The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. Potential hazards of electricity are preventable if you do which of the following listed below? 0000017163 00000 n 0000005520 00000 n 0000013716 00000 n Additionally, the ground prongs were missing from the two cords. Look for overhead power lines and buried power line indicators. 4. 2. Electrical current travels through insulated ________. %PDF-1.5 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. (E) a, b, and c. 2. Quiz: Electrical Hazards. 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. Select the choices that accurately define the common electrical term. 0000004965 00000 n A Safety Electrical One Line Diagram should be used to _____ all sources of electrical energy. Flexible Cord Not 3-Wire, Hard Service Variety: A worker received a fatal shock when he was cutting drywall with a metal casing router. Electric current cannot exist without an unbroken path to and from the conductor. Dust a.Ground Fault Circuit Insulator 1.Extension cords Fire Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. He plans to use it over a period of at least six months. Burns. d.Add more outlets. 2.Placed along a wall. Post warning signs. Which of the following part of you body can burn if you come in contact with electricity? Which of the following can be caused by exposure to an arc flash? 1.Is faulty Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. How will she choose the correct cord? Get All Answers to OSHA 30 Construction Final Exam. 1.Fingernails Then answer the questions below. OSHA 10 - Exit Routes, Emergency Action Plans, The Analysis and Design of Linear Circuits, Albert J. Rosa, Gregory J. Toussaint, Roland E. Thomas. A 29-year-old worker was electrocuted when he pushed a crane cable into a 7,200-volt power line. 0000057373 00000 n 0000427811 00000 n Dirk, a 28-year-old mechanic, is performing maintenance on a piece of equipment when he is shocked. d. No, because an extension cord would not provide enough power. The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. The small electrical current enters his body through his left leg. 0000013999 00000 n 0000022637 00000 n ZR)!=w|; @uT C0? Used across walkways. (C) Hot sticks. :$#k9BPnZ{Qqe/reKy,'ZlB# To avoid injury or death, you must understand and recognize hazards. % Ground all exposed metal parts of equipment. Bob is asked to repair some overhead wiring, requiring the use a ladder. Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). c.Touching the motor The auger has a one-quarter horsepower motor encased in a metal housing with two handles. b.A fast-acting switch monitoring current flow Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? Question 1: Which of these is a type of Ground Fault Circuit Adapter? g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream stream 3.No, because he will not be touching any grounded material when using the tool. 0000007427 00000 n Work performed on an electrical system within reaching distance of energized components is_____work. It's okay to use extension cords with worn insulation, as . Only after a rescue squad arrived about 4 minutes later did anyone realize that the crane was in contact with a power line -- all those present had assumed that the victim had suffered a heart attack. NFPA 70E defines those special circumstances and sets rigid electrical safety limits on voltage exposures, work zone boundary requirements and necessary personal protective equipment (PPE). -If current passes through the body near the heart or brain. Intentionally creating a low-resistance path that connects to the earth. Select the correct answer and then click DONE. 0000004208 00000 n d.50,000 volts. uVNSF!UTRQ91uR,6@hCH}]GAlaPh)NeT$iQ89S9|?4wahU ltz9 PH[$I&VX9WG%K~1{u8M:D"+HLEy 3@NR^z!rB^?RyOj;'Lof. H\n@0vj@/R#tnvihavopnS1>v8Z6zLpOCRU.O^6pImjgk{xv6%zp\,{|7_WqNfhu09$U?kW}: }y}]OIL5~W*8D~%W-yww;sORYbfspA.%YJV L%=Kx&0W+ Use only cords, connection devices, and fittings that are equipped with strain relief. 0000002122 00000 n 2. Isolating, Power lines may be located underground. specifically addresses electrical protective devices. 0000001604 00000 n Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. The victim was part of a crew that was constructing a concrete wall. Select the correct answer and then click DONE. Call ________ prior to digging to be connected with your local One Call Center to have all underground lines located by the utility company. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. 0000004921 00000 n The auger then fell across the other worker, the 24-year-old victim. 0000068035 00000 n endobj Apply a warning tag to any defective tool and do not use it until the problem has been corrected. A fault occurred, and with no grounding and no GFCI protection, the worker was electrocuted. %PDF-1.4 % lex has set up a mobile engine testing station in the maintenance area. 0000089142 00000 n The driver stopped the truck under the power line, and the victim, not realizing that the truck had moved, swung the boom to position the bucket behind the truck. 3.The length of time the body is in contact with electricity 4.Running through doorways. You should? C 277v. -Grounding= a conductive connection to the earth which acts as a protective measure. 0 The factors that determine the severity of an electrical injury include: What is the output of the program in Exercise 17, if first = 26 and second = 8? 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. lb MKS xYmo -ER/&@[D,_! OSHA Pros, LLC is an authorized provider of 360 Training, an OSHA-Accepted Provider, offering training and certification courses for NFPA 70E-Standard, and 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. The ________ keeps the electricity on its intended path through the conductor. 0000001646 00000 n 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. The normal wear and tear on extension and flexible cords at your site can loosen or expose wires, creating hazardous conditions. Quiz Question 2: Which is acceptable when using powdered tools? 2.Loose screws 1.Cuts 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. How fast would the ball be moving at the moment of release? This caused him to fall from the ladder and land in a puddle of water, still holding the saw. 0000002195 00000 n 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). [, Do not modify cords or use them incorrectly. 0000004884 00000 n a.Two-prong plug 2.Skin 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. Select the correct answer and then click DONE. Easy to identify trailer <]/Prev 500768/XRefStm 1495>> startxref 0 %%EOF 222 0 obj <>stream 2.Yes, because he is using a portable power tool. x_HSqnwmky54YLzeStJi# TZObFT*.#BQF/Q Ground all power supply systems, electrical circuits, and electrical equipment. 0000004274 00000 n 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$]r**-I!o66PqK.z "*D using a 30-amp breaker in a system with 15- or 20-amp receptacles. Use only equipment that is approved to meet OSHA standards. A doubly ionized lithium atom (Li2+,Z=3)\left(\mathrm{Li}^{2+}, \mathrm{Z}=3\right)(Li2+,Z=3) is in n=4n=4n=4 Bohr orbit. This is action is also known as creating or completing an electrical circuit. I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB True. 0000005716 00000 n Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. 2. Explosion. Besides personal bodily injury, what other electrical hazards can be found in the workplace? Which of these can be used as insulating live-line tools for electrical protection. q>NmnLNmb$"Iyx1bD9.~Ll. 0000004686 00000 n Select the correct answer and then click DONE. (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. 0000001116 00000 n The source of the shocks -- the saw -- was not replaced. c.Gasoline _5JKy. To be safe, you must think about your job and plan for hazards. Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. 2.Grounding A 120v. As a result, the ground prong of the welder plug did not insert into the ground terminal of the cord, so that as soon as a connection was made, the outside metal case of the welder became energized, electrocuting the victim. [Flexible Cords and Power Tools]. 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. 1. Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? 3.Tears 1452 25 3. 1. Additional minimum clearance distance is required for power lines carrying over ________. In addition to contact with power lines, the top electrical hazards include: Hand-operated metal shifting ropes or cables of electric elevators. Using the wrong light bulb wattage; Overloading power strips and outlets; Unprotected electrical outlets; Poor wiring; Defective electrical wires OSHA will keep all identities confidential. 12 months C. 6 months D. Never Q23. d.The body of the power tool. View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. 1,[-c|"&u[Fu>wjte8j:xRk )"m_!6awT J,byp?fRBf?p|b3/Um\7"|+@5vvWAa5J^y*q,l b)Ftt4 :4,-J`! [29 CFR 1926.416(a)(1)]. 0000000816 00000 n 0000001896 00000 n Protection is lost because it will not trip when the system's load has been exceeded. A. indoors. 2.Grease [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. 0000004946 00000 n Arc Flash. 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. One worker, holding the deadman's switch, received a shock from a ground fault in the auger and was knocked back from the machine. Quiz Question 10: Ground-fault circuit interrupters must be used for all of the following except? 4.Dirt build-up, Use only approved and authorized power tools in areas where the following hazards may be present: Which of the following can be the result of electric shock? a.A small current A worker was removing a metal antenna when it made electrical contact with a 7200-volt power transmission line. Examples of Equipment That Can Contact Power Lines. 3. Identify the oxidizing and reducing agents. d.Metal, Over half of all deaths caused by electricity result from contact with ________. Select the correct answer and then click on DONE. a.Yes, as it is a mobile engine testing station. 0000420277 00000 n <> Study with Quizlet and memorize flashcards containing terms like OSHA's electrical standards are based on: A. ANSI standards B. OSHA 10 General Industry Test Answer Key WALKING. Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. 0000001731 00000 n b.burns. 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. 3. Does the fall qualify as an electrical accident? Provides information about the hazards that electrical workers may experience as a part of their jobs. 0000007116 00000 n Question 1: Each year, approximately __________ workers suffer from electricity related injuries. 2.Using an aluminum ladder when the possibility exists for contact with electricity. Electrical hazards expose workers to the following: Burns: Three types; electrical, arc flash, or thermal contact. b.Not wearing insulating shoes or boots when she was handling electrical equipment d.Alert workers of any water in the area, GFCI is an acronym for: 4. When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. 0000004793 00000 n 3.Draped over equipment. 3.Maintaining a safe distance of at least 10 feet from all overhead power lines. When inspecting extension cords, look for: xref C. near water. Wearing a baseball cap Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. 2.Using extension cords or electrical tools properly. 0000056642 00000 n Use only extension cords that are 3-wire type. BE SAFE! Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. 1452 0 obj <> endobj If you are touching any grounded material while using a power tool 3. Question 2: Which of the following are ways employers must protect their employees on the workplace?