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/\"BQ>Rkl6xZWtAgfs Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. 1452 0 obj
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Quiz Question 1: Which of the following is not a category of electrical burns? b.burns. 0000000816 00000 n
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Supply power for tools or equipment on a long-term basis. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. . 2.Skin 0000421920 00000 n
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Electricity will form a "path" or "loop". A 29-year-old worker was electrocuted when he pushed a crane cable into a 7,200-volt power line. c.40,000 volts B. outdoors. 3. q>NmnLNmb$"Iyx1bD9.~Ll. The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. -Voltage= a measure of electrical force. Should Ajay use a GFCI? 2. Use only equipment that is approved to meet OSHA standards. Wearing a baseball cap 1.When you are using electricity near water <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
OSHA 29 CFR 1910, Subpart S . Electrocution. Becoming part of the circuit exposes you to ________, the most dangerous electrical hazard. 0000003715 00000 n
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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.10 feet 1. Which of the following are insulators of electricity? Fatal electrocution is the main risk, but burns and falls from elevations are also hazards. 4.Circuit breakers, When inspecting power tools, look for: 0000004274 00000 n
OSHA 29 CFR 1910.147 . The first worker knocked the auger off the victim, but saw that the electric cord was wrapped around the victim's thigh. a.20,000 volts The NEC C. Suggestions c.Power lines b.Electrical tools 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. In 2017, there were over ______________ electrical related violations cited by OSHA in the workplace. Select the correct answer and then click DONE. Should he use an extension cord to power it? Other protective measures include guarding or insulating the lines. 0000005406 00000 n
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. g]+fn_m{mja_0Y w
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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. 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. Arc Flash. endobj
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In addition to contact with power lines, the top electrical hazards include: High humidity 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. 3. The auger has a one-quarter horsepower motor encased in a metal housing with two handles. 1 0 obj
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A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. Explosion. 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. Question 2: Which of the following are ways employers must protect their employees on the workplace? 0000003900 00000 n
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Get All Answers to OSHA 30 Construction Final Exam. 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. 0000110659 00000 n
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Protection is lost because it will not trip when the system's load has been exceeded. A. indoors. Explain the purpose and use of the MyPlate symbol. 0000004444 00000 n
3.Vapor C 277v. vpfuI)],s xYmo -ER/&@[D,_! -Rubber. 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? Lockout/tagout procedures. specifically addresses electrical protective devices. 2. Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. Determine duration, frequency, degree of exposure to hazards and physical stress. Continually audit cords on-site. x=k6S *ywvkDyb_w rg&@Q5/^4O_~w/]7[xqs7Zt?LK-,>W\W`Mb?n8\.vpOJA7~5R%.oJd|Bbv7biQH%^~C=m3_ov{8]
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Qp@"]yOnNw89 OSHA requires the testing of a volt meter after a voltage test on voltage above_____. a.Standing in water 1452 25
Select the correct answer and then click DONE. 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. b.811 b.Yes, as it would be too expensive to install more permanent wiring and receptacles. Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. <>>>
When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. 3.Body tissue (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. 3.No, because he will not be touching any grounded material when using the tool. 0000057373 00000 n
Use only cords, connection devices, and fittings that are equipped with strain relief. 0000010603 00000 n
Fire What is the output of the program in Exercise 17, if first = 26 and second = 8? Quiz Question 7: Which is not an insulator? 0000024814 00000 n
You should? The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. Electrical Safety Quiz Electrical safety is an important topic that you and your workers need to know about. 0000089142 00000 n
Water The small electrical current enters his body through his left leg. a.Shut off power within a fraction of a second When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. Which group would be more accurate when used in an accelerating spaceship? =EAn`u!d, |\~Y>ZF(
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a.related to muscle damage. 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. 0000004273 00000 n
Ajay needs to use a dewatering pump to drain standing water on a construction site. 2.Grease 2. 0000001646 00000 n
Select the correct answer and then click DONE. Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). Computers 12 months C. 6 months D. Never Q23. Provide a safe path to earth ground for electricity. The following references aid in recognizing hazards associated with electrical work. 0000005734 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. a. Gaseous matter Select the choices that accurately define the common electrical term. endobj
1.Extension cords 2.Loose screws a.Supply power for tools or equipment on a temporary or short-term basis. 0000000016 00000 n
The workers administered CPR to the victim, but to no avail. You discover the electrical cord on a drill has been damaged and some of the cord's insulation is missing. and more. Quiz Question 2: Which is acceptable when using powdered tools? 4.Must be replaced, Always use a GFCI: 0000005042 00000 n
What is the most common, non-fatal, electrical shock-related injury? 5. Ground all exposed metal parts of equipment. A measure of the energy of motion of the particles in a substance is its _____. Question 2: It's okay to use extension cords with worn insulation, as long as you are careful about it. When it completes a circuit through the body. Use only extension cords that are marked with a designation code for hard or extra-hard usage. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. 182 0 obj
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True. Potential hazards of electricity are preventable if you do which of the following listed below? 4.Damaged cover or insulation, When using electric-powered hand tools, do not overload: c) Establish and enact an assured equipment grounding conductor program (AEGCP) |tYny@YE>LkNj4-czZf"Usw>j\sv3fn},>},KeA s Ground metal parts of the following non-electrical equipment, as specified by the OSHA standard [, Frames and tracks of electrically operated. OSHA: Air Monitoring & Medical Surveillance, 5 ANO - RETOMANDO ARTIGO, SUBSTANTIVO E ADJE. *Effects are for voltages less than about 600 volts. Overview. -Falls. 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 The factors that determine the severity of an electrical injury include: 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. Besides personal bodily injury, what other electrical hazards can be found in the workplace? Provides information about the hazards that electrical workers may experience as a part of their jobs. 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.Clear One hand drill was not grounded, and the other had no safety plate. SCENARIO: You encounter a co-worker on a residential remodeling job. Be sure equipment that has been shop fabricated or altered is in compliance. 0000003254 00000 n
gYpV:+ b.Metal 0000001495 00000 n
Due to the dynamic, rugged nature of construction work, normal use of electrical equipment at your site causes wear and tear that results in insulation breaks, short-circuits, and exposed wires. 0000005050 00000 n
Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. 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. 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! 0000004793 00000 n
3. In which of the following workplace situations are you at risk for coming into contact with live electrical . b.30,000 volts . C. near water. Question 1: Which of the following is a danger of electricity? 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. When inspecting extension cords, look for: 4. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. 0000056642 00000 n
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. Cardiac arrest or death - A result of electrical shock. When does electricity become hazardous to humans? Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. 3.Draped over equipment. Which of the following are caused by contact with electricity? Equipment used in manner prescribed. ZR)!=w|; @uT C0? 0000002557 00000 n
Additional minimum clearance distance is required for power lines carrying over ________. 0000007741 00000 n
The victim was part of a crew that was constructing a concrete wall. 0000002733 00000 n
-Damage to internal organs. Question 2: Which of the following are ways . 0000108920 00000 n
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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. Select the correct answer and then click DONE. Electrical Contractors Industry. 0000419562 00000 n
Improper Use of Extension and Flexible Cords. 3.Cramp startxref
c.The outlet. Explosion After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. 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. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
Easy to identify Additionally, the ground prong was missing and there was no GFCI protection. RZyd 0000420277 00000 n
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. D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. 1.Missing or broken path to ground. The ________ keeps the electricity on its intended path through the conductor. b.Ground Fault Critical Interrupter 4.Running through doorways. 4 0 obj
She has an older drill with a steel housing and a 3-prong plug. Select the correct answer and then click on DONE. How might this event affect the ability of animals to obtain energy to live? @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ -Current= the movement of electrical charge. [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. 0000001908 00000 n
The length of time the body is in the circuit, in contact with electricity - Factor determining the severity of an electrical . Using cords or tools with worn insulation or exposed wires. Question 1: Which of these is a type of Ground Fault Circuit Adapter? 0000004965 00000 n
Take any defective equipment out of service. When current travels through your body - Definition of electric shock. 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. 0000007116 00000 n
Regarding hand protection employers should: A. 2. What three things must be present for a current to flow through a conductor. When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. 0000005520 00000 n
On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. 1.Using a fiberglass ladder when the possibility exists for contact with electricity. [Power Tools]. a.Your thumb. Underground electrical hazards are: A. Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. 0000004884 00000 n
What do tripped circuit breakers and blown fuses indicate? <>
Look for overhead power lines and buried power line indicators. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. Is not painted over 2.Grounding One worker, holding the deadman's switch, received a shock from a ground fault in the auger and was knocked back from the machine. This caused him to fall from the ladder and land in a puddle of water, still holding the saw. D. near other electrical equipment. No GFCI's were used. The most dangerous place to use electrical equipment is? a. -Wood. Muscular contraction and nerve damage occur; death likely. c.Gasoline Is the west coast of Africa a plate boundary? lb
MKS Then answer the questions below. Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. d.Constructive objects, Select all answers that apply to the following statement and then click DONE. Quiz Question 3: Power cords can be damaged by which of the following? Apparently, his hand contracted and he was "locked" to the saw. c.Absorb any water around the area Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. 4.Broken. b.Match the thickness of the extension cord to the thickness of the nail gun's power cord. 4,600. Do not remove ground prongs from cord- and plug-connected equipment or extension cords. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape.
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