1. Among all of the safety measures that can and should be used to prevent electrical shock, which one is the most essential? 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. d.Metal, Over half of all deaths caused by electricity result from contact with ________. 2.Using extension cords or electrical tools properly. Others, such as office workers and sales people, work with electricity indirectly and may also be exposed to electrical hazards. If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. Both could have prevented the accident from occuring. 1476 0 obj
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When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: b.Match the thickness of the extension cord to the thickness of the nail gun's power cord. 0000007464 00000 n
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2. 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. 1.Is faulty Which of the following can be the result of electric shock? You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. 1. 0000421920 00000 n
Visually inspect all electrical equipment before use. a.Extension cords A. wrap tape around the damaged spot to prevent electrical shocks. 2. a.Yes, as it is a mobile engine testing station. c.Power lines 2.Is working properly endobj
The workers administered CPR to the victim, but to no avail. -Conductor= permits the free flow of electricity. OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. b.Shut off power within five minutes of the imbalance 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.Using an aluminum ladder when the possibility exists for contact with electricity. Electrical hazards like frayed cords, missing ground pins, improper wiring or the harm that these hazards pose. Ground metal parts of the following non-electrical equipment, as specified by the OSHA standard [, Frames and tracks of electrically operated. It is important to note that NFPA 70E is a . 1.Fingernails d.Alert workers of any water in the area, GFCI is an acronym for: a.Electricity Using a dry wood ladder when the possibility exists for contact with electricity. lex has set up a mobile engine testing station in the maintenance area. This is action is also known as creating or completing an electrical circuit. Carly needs to use an extension cord with her corded nail gun. Electrical hazards are life threatening incidents that could happen due to electricity. 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. 0000001116 00000 n
When inspecting extension cords, look for: 0000004444 00000 n
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Question 2: Which of the following is NOT a category of electrical burns? hb``b``=p0X8n0lY0L#rK[V26h* @0H!XDl+!&FfUfo`h6l Select the choices that accurately define the common electrical term. vpfuI)],s Regarding hand protection employers should: A. Use only extension cords that are marked with a designation code for hard or extra-hard usage. These short objective type questions with answers are very important for competitive exams as well as Board exams. c.Wood a.Standing in water 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 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. BE SAFE! 4. [Flexible Cords and Power Tools]. A) 120v . Equipment used in manner prescribed. Quiz Question 1: Which of the following is not a category of electrical burns? 0000003413 00000 n
a.Conductive objects 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. 4.Must be replaced, Always use a GFCI: 0000001861 00000 n
d.A power tool, A GFCI is designed to: Electricity will form a "path" or "loop". As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. Besides personal bodily injury, what other electrical hazards can be found in the workplace? Get resources on specific hazards and their control, including identification, risk assessment and inspections, to keep your workplace healthy and safe. 0000001814 00000 n
Use only cords, connection devices, and fittings that are equipped with strain relief. -Severe skin burns. c.Gasoline HWMo#7v#h>6,Z4- gYpV:+ The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. b.Ground Fault Critical Interrupter Bob is asked to repair some overhead wiring, requiring the use a ladder. 1. 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. 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. OSHA 29 CFR 1910, Subpart P . Explain the purpose and use of the MyPlate symbol. 12 months C. 6 months D. Never Q23. Electrical current travels through insulated ________. The ________ keeps the electricity on its intended path through the conductor. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. 0000004884 00000 n
b) By supplying GFCIs, or ground-fault circuit interrupters A co-worker disconnected the power cord to the saw, too late to save the victim. %
Quiz: Electrical Hazards. 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: Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. Electrical Safety Multiple Choice Questions and Answers for competitive exams. 3.Clear 0000003771 00000 n
Becoming part of the circuit exposes you to ________, the most dangerous electrical hazard. 4.The amount of current, An electrical burn may affect: Electrical hazards expose workers to the following: Burns: Three types; electrical, arc flash, or thermal contact. 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. 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 . Effective means of controlling power line hazards include: 0000002122 00000 n
c.Three-prong plug 3.ack of ground fault protection. De-energizing Quiz Question 3: Power cords can be damaged by which of the following? 0000068035 00000 n
a.Supply power for tools or equipment on a temporary or short-term basis. 4 0 obj
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Electrical Safety Quiz Electrical safety is an important topic that you and your workers need to know about. endobj
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. Which group would be more accurate when used in an accelerating spaceship? 1 0 obj
Additionally, the ground prong was missing and there was no GFCI protection. he most common shock-related injuries are: 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. Wearing a baseball cap 1. 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. 10,000 milliamps (10 amps) Cardiac arrest and severe burns occur. Working with electricity can be dangerous. (E) a, b, and c. 2. In addition to contact with power lines, the top electrical hazards include: Using modified cords or tools, e.g., removing ground prongs, face plates, insulation, etc. 2. Protection is lost because it will not trip when the system's load has been exceeded. Then answer the questions below. True. Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. 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. %PDF-1.5
The length of time the body is in the circuit, in contact with electricity - Factor determining the severity of an electrical . hazard or that their employer is not following OSHA's rules. startxref
Question 3: Employers are not required to enforce lock out/tag out practices in the workplaces. b.10 feet The floor is covered in water and she is barefoot. Which of the following factors determine how severe an electrical injury might be? B. outdoors. Overview. 2.Complete 0
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b.Yes, as it would be too expensive to install more permanent wiring and receptacles. 4.Cardiac arrest 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. 0000005406 00000 n
d. 411, You are working with a 10-foot section of a conductive pipe near power lines. 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: The victim was part of a crew that was constructing a concrete wall. Using equipment outdoors that is labeled for use only in dry, indoor locations. d.50,000 volts. c.Absorb any water around the area 1.When you are using electricity near water A 120v. The following are electrical hazards: Shock. Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. He may have dropped the extension cord at the site and not heard the connector break. When current travels through your body - Definition of electric shock. How will she choose the correct cord? 0000004921 00000 n
The victim signaled the operator of the crane to extend the boom and lower the hoist cable. Apparently, his hand contracted and he was "locked" to the saw. 0000002195 00000 n
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. Check your employee's electrical safety knowledge through an electrical safety quiz. 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). 0000108920 00000 n
a.Two-prong plug 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. lb
MKS The modification of the plug was not an intended use or prescribed by the manufacturer. When used on the moon? 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. An employee was texturing a wall using an air compressor. 4 0 obj
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3.Loss of eyesight Using tools and equipment that can contact power lines increases the risk. Explain the process that prevents the poles from steadily cooling off and the tropics from heating up over time. 2. Question 4: Which of the following is a type of burn caused by electrical hazards? 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. <>
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BIOLOGICAL HAZARDS: term effects) and strain (longAssociated with working with animals, people, or infectious plant materials. _5JKy. d.Constructive objects, Select all answers that apply to the following statement and then click DONE. 0000021516 00000 n
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Match the length from job to outlet. 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 Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. Select the correct answer and then click on DONE. What factors determine the severity of Dirk's injuries? Power was supplied through two extension cords from a nearby residence. 1.Damaged cover or insulation Which of the following part of you body can burn if you come in contact with electricity? Electrocution. 3. Quiz Question 4: Which is a preventive measure to prevent hazards while working with power lines? 0000014257 00000 n
a) Ensure overhead power line safety d. 20 feet. 0000007116 00000 n
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An examination revealed that the spring, cover plate, and part of the melamine casing were missing from the face of the female connector (the spring and some melamine fragments were found at the accident site). b.Not wearing insulating shoes or boots when she was handling electrical equipment Quiz Question 2: Which is acceptable when using powdered tools? A 29-year-old worker was electrocuted when he pushed a crane cable into a 7,200-volt power line. x_HSqnwmky54YLzeStJi#
TZObFT*.#BQF/Q A. indoors. While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. b.Electrical tools (See NFPA 70E-2021 Article 130 and OSHA subpart S part . Frames of non-electrically driven elevator cars to which electric conductors are attached. 5.Twitch, Electrical shock may result in: 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. 0000004274 00000 n
(D) None of the above. (b) The same reaction can also be classified as a redox reaction. 0000055319 00000 n
On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. h|UnH}+i-. A fault occurred, and with no grounding and no GFCI protection, the worker was electrocuted. Isolating, Power lines may be located underground. A measure of the energy of motion of the particles in a substance is its _____. Which of the following are insulators of electricity? )KL3C?e%Y92$,]^)kmR/!8\
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View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. d) All of the above. Continually audit cords on-site. 1. When does electricity become hazardous to humans? Select the correct answer and then click DONE. The source of the shocks -- the saw -- was not replaced. Best practices with power lines include: Select the correct answer and then click DONE. 2.Grounding <>>>
OSHA: Air Monitoring & Medical Surveillance, WebQuest: Biomes, Ecosystems and Habitats. a.A small current 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. 0000002557 00000 n
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4.No, because he does not need to use an extension cord. 3. [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. The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. Is not broken, Question Text: Electrical tools should be grounded with a(n)________. c) Age Extension cords had poor splices, no grounds, and reversed polarity. Water d.Ground Fault Circuit Interrupter, : Another electrical hazard that can cause injury or death in the workplace is a ________ path to ground. -Glass. [, Do not modify cords or use them incorrectly. He yelled for his co-workers to disconnect the power, which they did. endobj
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Select the correct answer and then click DONE. 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. After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. Electricity becomes hazardous when it takes an unintended path to complete the ________. Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? Which of the following are conductor of electricity? Select the correct answer and then click DONE. How might this event affect the ability of animals to obtain energy to live? What type of burns are the result of current flowing through and exiting the body? 0000001646 00000 n
2.Loose screws 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. 0000002150 00000 n
Select the correct answer and then click DONE. 4.Running through doorways. 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. Computers 1. Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. b.30,000 volts a.related to muscle damage. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Provides information about the hazards that electrical workers may experience as a part of their jobs. and more. 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. b.burns. 0000001604 00000 n
To be safe, you must think about your job and plan for hazards. 3.Cramp Select the correct answer and then click DONE. 3.The length of time the body is in contact with electricity Improper Use of Extension and Flexible Cords. Metal partitions, grill work, and similar metal enclosures around equipment of over 1kV between conductors. Be sure equipment that has been shop fabricated or altered is in compliance. As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. c.Guaranteed Fault Circuit Interrupter Test your knowledge with our electrical safety quiz below. If a defective power tool gives you an electric shock, how might your muscles react? 5. 0000007741 00000 n
Select the correct answer and then click DONE.
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