0000004444 00000 n The auger has a one-quarter horsepower motor encased in a metal housing with two handles. 0000003413 00000 n The following are electrical hazards: Shock. d. 20 feet. <> Hand-operated metal shifting ropes or cables of electric elevators. The router's 3-wire power cord was spliced to a 2-wire cord and plug set which was not rated for hard service. Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? 1.A source of electrical current to flow. 2.Loose bolts D. near other electrical equipment. When it completes a circuit through the body. The victim was part of a crew that was constructing a concrete wall. 0000018681 00000 n Take any defective equipment out of service. c.falls. 4.Dirt build-up, Use only approved and authorized power tools in areas where the following hazards may be present: The victim provided a path to ground and was electrocuted. (A) Shotgun sticks. c.Three-prong plug 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. 0000057373 00000 n Study with Quizlet and memorize flashcards containing terms like OSHA's electrical standards are based on: A. ANSI standards B. Among all of the safety measures that can and should be used to prevent electrical shock, which one is the most essential? Study with Quizlet and memorize flashcards containing terms like Among all of the safety measures that can and should be used to prevent electrical shock, which one is the most essential?, According to NFPA 70E, job briefings must be held for those employees that will be working on or near live parts operating at ______ or more., When does electricity become hazardous to humans? 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. 4.The amount of current, An electrical burn may affect: Best practices with power lines include: OSHA 10 General Industry Test Answer Key WALKING. (3,2,1), (5,4,3). c.The outlet. A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. 128 0 obj <> endobj xref 128 26 0000000016 00000 n 0000002122 00000 n Stay at least 10 feet away from overhead power lines. Unless you know otherwise, assume that overhead lines are energized. x_HSqnwmky54YLzeStJi# TZObFT*.#BQF/Q Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. OSHA 29 CFR 1910, Subpart P . 3.Needs to be reset 0000014257 00000 n Freeze Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. How might this event affect the ability of animals to obtain energy to live? 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. These short objective type questions with answers are very important for competitive exams as well as Board exams. Select the correct answer and then click DONE. 0000001672 00000 n In addition to contact with power lines, the top electrical hazards include: 1.Missing 2.Flooding 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Select the choices that accurately define the common electrical term. a.Yes, as it is a mobile engine testing station. High humidity Quiz Question 2: Which is acceptable when using powdered tools? 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. 1.Fingernails The victim collapsed into the lake and sank 4-1/2 feet to the bottom. 0000015549 00000 n An employee was texturing a wall using an air compressor. Is not painted over Frequently inspect electrical systems to insure that the path to ground is continuous. 0000022637 00000 n 1. 0000002557 00000 n Electrical Safety Multiple Choice Questions and Answers for competitive exams. s\A0W+ 0000009628 00000 n 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. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. D. Have an ANSI sticker and an expiration date. Which of the following are insulators of electricity? Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. 0000004793 00000 n The modification of the plug was not an intended use or prescribed by the manufacturer. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. 0000013999 00000 n a) Door or window edges stream Others, such as office workers and sales people, work with electricity indirectly and may also be exposed to electrical hazards. 1. As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. OSHA 10 General Industry Topic Exams Answer Key TOPIC EXAM 1: INTRO TO OSHA 1. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. Which of the following are insulators of electricity? [Power Tools]. Does the fall qualify as an electrical accident? 3.Maintaining a safe distance of at least 10 feet from all overhead power lines. 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. He yelled for his co-workers to disconnect the power, which they did. The floor is covered in water and she is barefoot. qnde>9!.,T2 :hw5 #OaPxkx=y7]J-yv*'H$jmVCq$ sx:R2$9SY+D!!LJ:n+.\#Hu~2VI O? What type of burns are the result of current flowing through and exiting the body? -Voltage= a measure of electrical force. 0000414648 00000 n Bob is asked to repair some overhead wiring, requiring the use a ladder. OSHA Safety and Health Topics Page. Some of the causes of these are live wire s that may be lying around, overloaded circuits, explosions that are caused by flammable objects, etc. 0000002733 00000 n The source of the shocks -- the saw -- was not replaced. 5>vB35Plm$\4{U[lU`t~.vJGmFO^@+ cGPzNY*oS(m%q{Agp RZyd d.Metal, Over half of all deaths caused by electricity result from contact with ________. Safe operation of hand and portable powered tools and other hand-held equipment. b.Yes, because Bob was on . Select the choices that accurately define the common electrical term. 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. If a worker has been retaliated against for using their rights, they d.Adapter, What is a GFCI? Get resources on specific hazards and their control, including identification, risk assessment and inspections, to keep your workplace healthy and safe. If the insulation on the tool's power cord is damaged and you touch this area while grounded, the electricity will ________. 0000004965 00000 n Co-workers provided CPR, but were unable to revive the victim. 3. The most dangerous place to use electrical equipment is? A. wrap tape around the damaged spot to prevent electrical shocks. The victim signaled the operator of the crane to extend the boom and lower the hoist cable. a.Ground Fault Circuit Insulator 0000003715 00000 n How fast would the ball be moving at the moment of release? g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream q>NmnLNmb$"Iyx1bD9.~Ll. He plans to use it over a period of at least six months. Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. *Effects are for voltages less than about 600 volts. What is the most common, non-fatal, electrical shock-related injury? 3.When you are using portable power tools Becoming part of the circuit exposes you to ________, the most dangerous electrical hazard. The auger then fell across the other worker, the 24-year-old victim. b. trailer <<11AC4BACEBCA4B32A885F1120BD3A307>]>> startxref 0 %%EOF 153 0 obj <>stream 3. 1.When you are using electricity near water Most of the hydrides of Group 1A and Group 2A metals are ionic. a. xYmo -ER/&@[D,_! 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. h|UnH}+i-. 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. Quiz: Electrical Hazards. 4. Select the correct answer and then click DONE. 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. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. Using tools and equipment that can contact power lines increases the risk. The NEC C. Suggestions 5. 2.Yes, because he is using a portable power tool. What factors determine the severity of Dirk's injuries? 1 0 obj trailer Easy to identify -If current passes through the body near the heart or brain. 1. 0000005050 00000 n Death. B. 0000004274 00000 n H. It is important to note that NFPA 70E is a . d. No, because an extension cord would not provide enough power. Power was supplied through two extension cords from a nearby residence. 10,000 milliamps (10 amps) Cardiac arrest and severe burns occur. 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. 0000001908 00000 n 1.Extension cords Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. Water 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. a.Your thumb. It's okay to use extension cords with worn insulation, as . 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. c.A measurement of electricity 0000005734 00000 n 1.Cuts What is the output of the program in Exercise 17, if first = 26 and second = 8? 4 0 obj Electric current cannot exist without an unbroken path to and from the conductor. 2.Complete If a defective power tool gives you an electric shock, how might your muscles react? %%EOF Use only equipment that is approved to meet OSHA standards. 4.Cardiac arrest The ________ keeps the electricity on its intended path through the conductor. Is split Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? 2. -Wood. OSHA 29 CFR 1910.147 . d) All of the above. Select the correct answer and then click DONE. d.Alert workers of any water in the area, GFCI is an acronym for: 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. D 600v. b) By supplying GFCIs, or ground-fault circuit interrupters 1. Isolating, Power lines may be located underground. 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. After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. Outlets c.Gasoline Which of the following are caused by contact with electricity? d.The body of the power tool. xref De-energizing HWMo#7v#h>6,Z4- c.40,000 volts 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). 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. 1.Missing or broken path to ground. True. This may damage your equipment and cause employee injuries. Noise, : ________ or heavy perspiration can cause electricity to take an unintended path. 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. 0000001861 00000 n No GFCI's were used. trailer <]/Prev 500768/XRefStm 1495>> startxref 0 %%EOF 222 0 obj <>stream 0000006866 00000 n _5JKy. Explain the purpose and use of the MyPlate symbol. Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. Continually audit cords on-site. <>>> Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. 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. 0000419562 00000 n %PDF-1.4 % The pole had not been inspected by the city and was not in compliance with code requirements (it was not grounded). Electrocution. and more. Protection is lost because it will not trip when the system's load has been exceeded. c) Age What three things must be present for a current to flow through a conductor. 2.Using an aluminum ladder when the possibility exists for contact with electricity. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. Match the length from job to outlet. 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. 2. uVNSF!UTRQ91uR,6@hCH}]GAlaPh)NeT$iQ89S9|?4wahU ltz9 PH[$I&VX9WG%K~1{u8M:D"+HLEy 3@NR^z!rB^?RyOj;'Lof. Working with electricity can be dangerous. As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. Frames of non-electrically driven elevator cars to which electric conductors are attached. Question 4: Which of the following is a type of burn caused by electrical hazards? c. Match the color of the tool to the color of the extension cord. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. c.Wood Should Ajay use a GFCI? BIOLOGICAL HAZARDS: term effects) and strain (longAssociated with working with animals, people, or infectious plant materials. Using a dry wood ladder when the possibility exists for contact with electricity. a.
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