The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. As she is adding in the chemicals, her hand touches the motor and it becomes energized. Fire d.Ground Fault Circuit Interrupter, : Another electrical hazard that can cause injury or death in the workplace is a ________ path to ground. c. Extend the reach of the power tool. 1 0 obj
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Outlets Intentionally creating a low-resistance path that connects to the earth. Take any defective equipment out of service. Suppose a volcano threw so much ash into the air that it blocked much of the sunlight. If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. Water The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. OSHA: Air Monitoring & Medical Surveillance, 5 ANO - RETOMANDO ARTIGO, SUBSTANTIVO E ADJE. 3. C. near water. The victim signaled the operator of the crane to extend the boom and lower the hoist cable. A. indoors. I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB s\A0W+ c.Touching the motor Muscular contraction and nerve damage occur; death likely. 0000021516 00000 n
What type of burns are the result of current flowing through and exiting the body? 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. OSHA 10 - Exit Routes, Emergency Action Plans, The Analysis and Design of Linear Circuits, Albert J. Rosa, Gregory J. Toussaint, Roland E. Thomas. Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ The contact lasts for 5 seconds before someone is able to shut off the power. 2. xYmo -ER/&@[D,_! This is action is also known as creating or completing an electrical circuit. Electricity becomes hazardous when it takes an unintended path to complete the ________. Question 4: Which of the following is a type of burn caused by electrical hazards? The auger has a one-quarter horsepower motor encased in a metal housing with two handles. A measure of the energy of motion of the particles in a substance is its _____. 0000003771 00000 n
Examples of Equipment That Can Contact Power Lines. 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. 0000419562 00000 n
Use only extension cords that are marked with a designation code for hard or extra-hard usage. d.Add more outlets. 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. The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. 0000001604 00000 n
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Does the fall qualify as an electrical accident? c. Inductive objects Of the following choices, which are frequent electrical hazards When an electric shock occurs, your muscles may: The following are electrical hazards: Shock. Freeze 1) The _____ created the Occupational Safety and Health Administration (OSHA) to set and enforce protective workplace safety and health standards. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. 0000422244 00000 n
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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. Select the correct answer and then click DONE. What do tripped circuit breakers and blown fuses indicate? Cardiac arrest or death - A result of electrical shock. 1. OSHA 29 CFR 1910, Subpart S . It is important to note that NFPA 70E is a . D 600v. A Safety Electrical One Line Diagram should be used to _____ all sources of electrical energy. When inspecting extension cords, look for: A. wrap tape around the damaged spot to prevent electrical shocks. Study with Quizlet and memorize flashcards containing terms like Bob is asked to repair some overhead wiring, requiring the use a ladder. H. OSHA 29 CFR 1910, Subpart P . c.A measurement of electricity What is the minimum clearance distance you must maintain from the power lines? When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. <<7628BB2D46738F42B2FC6393656F4718>]>>
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(See NFPA 70E-2021 Article 130 and OSHA subpart S part . b.30,000 volts Protection is lost because it will not trip when the system's load has been exceeded. When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: OSHA 10 General Industry Test Answer Key WALKING. Look for overhead power lines and buried power line indicators. a) Door or window edges Using equipment outdoors that is labeled for use only in dry, indoor locations. xref
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-Damage to internal organs. 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. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. Should he use an extension cord to power it? c.40,000 volts 0000089142 00000 n
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Electrical hazards are life threatening incidents that could happen due to electricity. 3. When it completes a circuit through the body. Additionally, the ground prong was missing and there was no GFCI protection. Get All Answers to OSHA 30 Construction Final Exam. You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. HWMo#7v#h>6,Z4- 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? 3.When you are using portable power tools Using tools and equipment that can contact power lines increases the risk. 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. In which of the following workplace situations are you at risk for coming into contact with live electrical . H\n@0vj@/R#tnvihavopnS1>v8Z6zLpOCRU.O^6pImjgk{xv6%zp\,{|7_WqNfhu09$U?kW}: }y}]OIL5~W*8D~%W-yww;sORYbfspA.%YJV
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(C) Hot sticks. b.Metal A 120v. Select the correct answer and then click DONE. This caused him to fall from the ladder and land in a puddle of water, still holding the saw. b.10 feet 2.Placed along a wall. Which of these can be used as insulating live-line tools for electrical protection. Whether the hazard is posed by worn or damaged power tools or cords, improperly grounded tools or equipment, or the presence of standing water, it is the responsibility of the contractor to make sure the tools and equipment 0000420277 00000 n
a.Yes, because the electrical shock caused the fall. The most dangerous place to use electrical equipment is? 0000005632 00000 n
Hazards are created when cords, cord connectors, receptacles, and cord- and plug connected equipment are improperly used and maintained. Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. d. 20 feet. 0000421627 00000 n
1.Missing SCENARIO: You encounter a co-worker on a residential remodeling job. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. 4.Circuit breakers, When inspecting power tools, look for: Quiz Question 5: A/an ___________ is a unit of measurement for electrical resistance. 0000001861 00000 n
2. Get resources on specific hazards and their control, including identification, risk assessment and inspections, to keep your workplace healthy and safe. Which of the following can be the result of electric shock? Question 3: Employers are not required to enforce lock out/tag out practices in the workplaces. Post warning signs. -Glass. 3. Arc Flash. 0000002733 00000 n
The normal wear and tear on extension and flexible cords at your site can loosen or expose wires, creating hazardous conditions. 0000004946 00000 n
1.Pain 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. 1.Extension cords %PDF-1.5
Electrical hazards expose workers to the following: Burns: Three types; electrical, arc flash, or thermal contact. qnde>9!.,T2 :hw5 #OaPxkx=y7]J-yv*'H$jmVCq$ sx:R2$9SY+D!!LJ:n+.\#Hu~2VI O? 4.Organs, The presence of ________ can turn you, your equipment, or insulators like wood into conductors. Stay at least 10 feet away from overhead power lines. Overview. 0000014257 00000 n
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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. 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 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. Visually inspect all electrical equipment before use. Using multi-receptacle boxes designed to be. (E) a, b, and c. 2. 0000007464 00000 n
d.Alert workers of any water in the area, GFCI is an acronym for: One worker, holding the deadman's switch, received a shock from a ground fault in the auger and was knocked back from the machine. BE SAFE! endobj
What factors determine the severity of Dirk's injuries? Select the correct answer and then click DONE. 2.Using extension cords or electrical tools properly. Identify the oxidizing and reducing agents. 3.Something that causes current to flow through the . startxref
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a. Gaseous matter Explosion 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. 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. 2 0 obj
a.Conductive objects Which of the following are insulators of electricity? On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. Regarding hand protection employers should: A. One hand drill was not grounded, and the other had no safety plate. -Grounding= a conductive connection to the earth which acts as a protective measure. To avoid injury or death, you must understand and recognize hazards. (See NFPA 70E-2021 Article 130 and OSHA subpart S part 1910.333 (a) (1)- (2) and (c) for complete details.) 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. 0000015549 00000 n
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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. Use only equipment that is approved to meet OSHA standards. A) 120v . Apply a warning tag to any defective tool and do not use it until the problem has been corrected. 2.Something to transport the electrical current -- A conductor. Electric current cannot exist without an unbroken path to and from the conductor. High humidity 0000005406 00000 n
4.Damaged cover or insulation, When using electric-powered hand tools, do not overload: Fatal electrocution is the main risk, but burns and falls from elevations are also hazards. 4.Running through doorways. a.Ground Fault Circuit Insulator 4 0 obj
View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. Should Ajay use a GFCI? A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. 0000427811 00000 n
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Is not painted over Question 1: Which of these is a type of Ground Fault Circuit Adapter? d.Adapter, What is a GFCI? 0000022637 00000 n
Which of the following injuries can occur when muscles flex or twitch from an electrical shock? 4.Cardiac arrest 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. 0000028595 00000 n
Select the correct answer and then click DONE. . 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. [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. %
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Does the fall qualify as an electrical accident? b. Deductive objects %PDF-1.5
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Draw a line from the item on the left that corresponds to the match on the right. How might this event affect the ability of animals to obtain energy to live? c) Establish and enact an assured equipment grounding conductor program (AEGCP) a) Ensure overhead power line safety Electrocution. He may have dropped the extension cord at the site and not heard the connector break. <>>>
[Flexible Cords and Power Tools]. 0
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c.Wood 1.A source of electrical current to flow. Working with electricity can be dangerous. 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. 4.Good condition of moveable parts, Items that could encourage overheating and cause tools to malfunction or start a fire include: Death. b) By supplying GFCIs, or ground-fault circuit interrupters OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. OSHA Pros, LLC is an authorized provider of 360 Training, an OSHA-Accepted Provider, offering training and certification courses for NFPA 70E-Standard, and Hand-operated metal shifting ropes or cables of electric elevators. %PDF-1.4
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As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. b.The tool's power cord. Electricity will form a "path" or "loop". c.Absorb any water around the area The workers administered CPR to the victim, but to no avail. One handle has a deadman's switch. 1.The humidity of the environment he most common shock-related injuries are: Select the correct answer and then click DONE. 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. _5JKy. Looking for NFPA 70E Certification? 2.Yes, because he is using a portable power tool. A co-worker disconnected the power cord to the saw, too late to save the victim. She finds several available in the shop. Frequently inspect electrical systems to insure that the path to ground is continuous. If a defective power tool gives you an electric shock, how might your muscles react? Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . If a worker has been retaliated against for using their rights, they c.Three-prong plug Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? 0000008392 00000 n
4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. a.311 How fast would the ball be moving at the moment of release? ( Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. 0000007694 00000 n
Select the correct answer and then click DONE. Determine duration, frequency, degree of exposure to hazards and physical stress. 0000002385 00000 n
gYpV:+ As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. [, Use all equipment according to the manufacturer's instructions. 3 0 obj
Becoming part of the circuit exposes you to ________, the most dangerous electrical hazard. Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. 2 0 obj
1. Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. d.A power tool, A GFCI is designed to: If you are touching any grounded material while using a power tool stream
. 3. The modification of the plug was not an intended use or prescribed by the manufacturer. (A) Shotgun sticks. He plans to use it over a period of at least six months. 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. Quiz Question 4: Which is a preventive measure to prevent hazards while working with power lines? 4.No, because he does not need to use an extension cord. Question 3: A/an ____________ is a unit of measurement for electrical resistance. Potential hazards of electricity are preventable if you do which of the following listed below? OSHA Safety and Health Topics Page. 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 . b.Shut off power within five minutes of the imbalance 0000001495 00000 n
De-energizing 3.Tears Select the correct answer and then click DONE. Is the west coast of Africa a plate boundary? c.Guaranteed Fault Circuit Interrupter endobj
-Severe skin burns. The ground wire was not attached on the male end of the cord's plug. Provide a safe path to earth ground for electricity. and more. 4.Must be replaced, Always use a GFCI: She has an older drill with a steel housing and a 3-prong plug. 0000007427 00000 n
-Falls. c. No, because the electricity is needed on a long-term basis. 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. 4. Bob is asked to repair some overhead wiring, requiring the use a ladder. Do not remove ground prongs from cord- and plug-connected equipment or extension cords. To be safe, you must think about your job and plan for hazards. -If current passes through the body near the heart or brain. endobj
specifically addresses electrical protective devices. 3. Short Confined spaces Machinery-related hazards (lockout/tagout, boiler safety, forklifts, etc.) a.Electricity 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. 3.Clear Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. a.related to muscle damage. Question 3: If following lock out/tag out procedures, what step should be taken BEFORE you shut down the equipment? a.Shut off power within a fraction of a second A laborer carried a piece of wire reinforcement (10 feet long by 8 inches wide) along the top section of the scaffold and contacted the power line with it. 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. A) Identify; Castigate; C) Evaluate; D) Modify; 3. Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. 1. OSHA requires the testing of a volt meter after a voltage test on voltage above_____. Ground all power supply systems, electrical circuits, and electrical equipment. Electrical safety requirements necessary for the practical safeguarding of employees in the workplace. gYpV:+ Which of the following are insulators of electricity? Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. Draw a line from the item on the left that corresponds to the match on the right. What is the primary purpose of properly grounding equipment? In addition to contact with power lines, the top electrical hazards include: B. 0000004793 00000 n
Which group would be more accurate when used in an accelerating spaceship? Electrical Contractors Industry. 3. 1. b.Electrical tools Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. 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. Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? endobj
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Select the correct answer and then click DONE. Select the choices that accurately define the common electrical term. a.Two-prong plug c.The outlet. Death is probable. b.A fast-acting switch monitoring current flow b.Rod Use non-conductive wood or fiberglass ladders when working near power lines. 1452 0 obj
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The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. Quiz: Electrical Hazards. 3.No, because he will not be touching any grounded material when using the tool. View Answer Answer: 600v 4 . 12 months C. 6 months D. Never Q23. 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: !DP#vr-\DM<6V-2'I5l6)Z@^m=}c3-aUOo6rr
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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. Test your knowledge with our electrical safety quiz below. 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. Electrical current travels through insulated ________. c.15 feet 1.Damaged cover or insulation 3 OSHA requires the testing of a volt meter after a voltage test on voltage above_____. OSHA: Air Monitoring & Medical Surveillance, WebQuest: Biomes, Ecosystems and Habitats. Quiz Question 10: Ground-fault circuit interrupters must be used for all of the following except? Lx*jWP# /c2)|]NXqAx>=~'[ The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. Explain the purpose and use of the MyPlate symbol. Unless you know otherwise, assume that overhead lines are energized. Extension cords had poor splices, no grounds, and reversed polarity. V1?`T`P``ya W3 |"H36K1A@, rO(V[|NAT30 qI?
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1. [, Do not modify cords or use them incorrectly. Select the choices that accurately define the common electrical term. 0000001814 00000 n
D. near other electrical equipment. Continually audit cords on-site. What three things must be present for a current to flow through a conductor. 2. b.811 2.Loss of muscle control Examples Of Electrical Hazards. Noise, : ________ or heavy perspiration can cause electricity to take an unintended path. The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. 3.Maintaining a safe distance of at least 10 feet from all overhead power lines. Carly needs to use an extension cord with her corded nail gun. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. 10,000 milliamps (10 amps) Cardiac arrest and severe burns occur. True. The victim provided a path to ground and was electrocuted. What is the most common, non-fatal, electrical shock-related injury? B. outdoors. 2.Using an aluminum ladder when the possibility exists for contact with electricity. You need to evaluate the situation you are in and assess your . The pole had not been inspected by the city and was not in compliance with code requirements (it was not grounded). 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. Using a dry wood ladder when the possibility exists for contact with electricity. 3 0 obj
Exercise their rights under the law without retaliation, including reporting an injury or raising health and safety concerns with their employer or OSHA. 2.The person's physical condition A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. 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. 1.Using a fiberglass ladder when the possibility exists for contact with electricity. Power was supplied through two extension cords from a nearby residence. Select the correct answer and then click DONE. (b) The same reaction can also be classified as a redox reaction. If the insulation on the tool's power cord is damaged and you touch this area while grounded, the electricity will ________. Which of the following are conductor of electricity? 0000003413 00000 n
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Question 1: Which of the following is a danger of electricity? Best Practices with Power Lines 1. 1.Fingernails 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. Metal partitions, grill work, and similar metal enclosures around equipment of over 1kV between conductors. 0000005734 00000 n
Use tools and equipment according to the instructions included in their listing, labeling or certification. Check your employee's electrical safety knowledge through an electrical safety quiz. x_HSqnwmky54YLzeStJi#
TZObFT*.#BQF/Q 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. 0000024814 00000 n
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