which of the following are electrical hazards osha quizlet
!DP#vr-\DM<6V-2'I5l6)Z@^m=}c3-aUOo6rr V-Y3d6HABmjD $TQCvK*eg&|Y596#H\ 0000419562 00000 n Using the wrong light bulb wattage; Overloading power strips and outlets; Unprotected electrical outlets; Poor wiring; Defective electrical wires -Rubber. %PDF-1.5 xb```VVF A10p,``Pp`hhdpn``r`L:[ I,aZ4Knj21 `ny; Ge7t@OrMx)"cx&e:[~J%aUJ\*t Ground all power supply systems, electrical circuits, and electrical equipment. 0000022637 00000 n The router's 3-wire power cord was spliced to a 2-wire cord and plug set which was not rated for hard service. Electrical hazards are life threatening incidents that could happen due to electricity. How fast would the ball be moving at the moment of release? Quiz Question 1: Which of the following is not a category of electrical burns? Select the correct answer and then click DONE. 0000005632 00000 n 1,[-c|"&u[Fu>wjte8j:xRk )"m_!6awT J,byp?fRBf?p|b3/Um\7"|+@5vvWAa5J^y*q,l b)Ftt4 :4,-J`! 0000007694 00000 n 0000010603 00000 n The following hazards are the most frequent causes of electrical injuries Contact with Power Lines, Lack of Ground-fault Protection, Path to Ground Missing or Discontinuous, Equipment Not Used in Manner Prescribed, and Improper Use of Extension and Flexible Cords. 0000002150 00000 n HJ=S~68438IR/:VR C Y<7H*$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 Which of the following can be the result of electric shock? Is split Hand-operated metal shifting ropes or cables of electric elevators. Ground metal parts of the following non-electrical equipment, as specified by the OSHA standard [, Frames and tracks of electrically operated. A) 120v . 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. 2.Loose screws 0000004965 00000 n Other protective measures include guarding or insulating the lines. Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . 0000017163 00000 n (E) a, b, and c. 2. specifically addresses electrical protective devices. The following references aid in recognizing hazards associated with electrical work. s\A0W+ 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. As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. The small electrical current enters his body through his left leg. d.The body of the power tool. 2. You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. Stay at least 10 feet away from overhead power lines. Which of the following injuries can occur when muscles flex or twitch from an electrical shock? Select the correct answer and then click DONE. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. Remove from service any equipment with frayed cords, missing ground prongs, cracked tool casings, etc. 0000003900 00000 n B. outdoors. B. 0000000816 00000 n 0000421627 00000 n OSHA requires the testing of a volt meter after a voltage test on voltage above_____. 4. c) Age 4.Must be replaced, Always use a GFCI: stream 1.Fingernails 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. 3.Vapor Select the correct answer and then click DONE. 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. 5 feet %PDF-1.4 % Protection is lost because it will not trip when the system's load has been exceeded. What is the minimum clearance distance you must maintain from the power lines? The modification of the plug was not an intended use or prescribed by the manufacturer. Extension cords are used to: Select the correct answer and then click DONE. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. Select the correct answer and then click DONE. 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. Quiz Question 9: Conductor insulation must be approved for the ___________ of use? % c.Power lines After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. 0000012360 00000 n Take any defective equipment out of service. 2. 4. 4.No, because he does not need to use an extension cord. vpfuI)],s 3.No, because he will not be touching any grounded material when using the tool. 0000001908 00000 n Be sure equipment that has been shop fabricated or altered is in compliance. 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. 0000005716 00000 n Which of the following are insulators of electricity? (See NFPA 70E-2021 Article 130 and OSHA subpart S part 1910.333 (a) (1)- (2) and (c) for complete details.) 0000001861 00000 n 2.Flooding Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. How will she choose the correct cord? a.Supply power for tools or equipment on a temporary or short-term basis. (b) The same reaction can also be classified as a redox reaction. Lockout/tagout procedures. Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. 0000007464 00000 n 0000014257 00000 n 0000089142 00000 n She has an older drill with a steel housing and a 3-prong plug. 0000006893 00000 n a.Conductive objects Question 4: Which of the following is a type of burn caused by electrical hazards? Regarding hand protection employers should: A. 2. DHPP0MHLHIPPXc f2LXL"dgJ:@ ys`llr-shH,Y@Z 23J0a_TXD;X,;&0i,i&f&T8h R/ v`,l. 440!2D9482q={LPXs +( endstream endobj 129 0 obj <> endobj 130 0 obj <> endobj 131 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageB]/ExtGState<>>> endobj 132 0 obj <> endobj 133 0 obj <> endobj 134 0 obj <> endobj 135 0 obj <>stream b.Rod a.Ground Fault Circuit Insulator It is important to note that NFPA 70E is a . -Grounding= a conductive connection to the earth which acts as a protective measure. Question 1: Which of these is a type of Ground Fault Circuit Adapter? When it completes a circuit through the body. Using modified cords or tools, e.g., removing ground prongs, face plates, insulation, etc. Quiz Question 7: Which is not an insulator? 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. The victim provided a path to ground and was electrocuted. True. d.Adapter, What is a GFCI? 3. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. d. Power outlets, ________ are anything that can transmit electrical current. 0000002195 00000 n endobj Computers Co-workers provided CPR, but were unable to revive the victim. He yelled for his co-workers to disconnect the power, which they did. Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. c.911 Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. Burns. The normal wear and tear on extension and flexible cords at your site can loosen or expose wires, creating hazardous conditions. Using a dry wood ladder when the possibility exists for contact with electricity. 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. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> endobj 3 OSHA requires the testing of a volt meter after a voltage test on voltage above_____. Provide a safe path to earth ground for electricity. The contact lasts for 5 seconds before someone is able to shut off the power. Which group would be more accurate when used in an accelerating spaceship? Damaged Extension Cord Leaves Arc Welder Ungrounded: A 29-year-old welder attempted to connect a portable arc welder to an electrical outlet using an extension cord. Frequently inspect electrical systems to insure that the path to ground is continuous. xYmo -ER/&@[D,_! Should he use an extension cord to power it? 0000005734 00000 n c) Establish and enact an assured equipment grounding conductor program (AEGCP) 0000003254 00000 n 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. 0000004793 00000 n c.40,000 volts . Lx*jWP# /c2)|]NXqAx>=~'[ 0000003715 00000 n OSHA Safety and Health Topics Page. 0000012944 00000 n Quiz Question 5: A/an ___________ is a unit of measurement for electrical resistance. Work performed on an electrical system within reaching distance of energized components is_____work. 3.The length of time the body is in contact with electricity 0000001672 00000 n 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. 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. Study with Quizlet and memorize flashcards containing terms like Bob is asked to repair some overhead wiring, requiring the use a ladder. 0000007427 00000 n Extension cords had poor splices, no grounds, and reversed polarity. d) All of the above. Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. View Answer Answer: 600v 4 . Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. If you are touching any grounded material while using a power tool Quiz Question 3: Power cords can be damaged by which of the following? D 600v. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Draw a line from the item on the left that corresponds to the match on the right. When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. c.Absorb any water around the area -Glass. a.311 d. Match the outlet prongs to the extension cord. Question 3: Employers are not required to enforce lock out/tag out practices in the workplaces. Which of the following part of you body can burn if you come in contact with electricity? Select the correct answer and then click DONE. Outlets High humidity [, Use all equipment according to the manufacturer's instructions. -Wood. The victim signaled the operator of the crane to extend the boom and lower the hoist cable. 2.Loose bolts 0000024814 00000 n 2.The person's physical condition 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. Use only extension cords that are marked with a designation code for hard or extra-hard usage. 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. 2.Is working properly Additionally, the ground prong was missing and there was no GFCI protection. Safe operation of hand and portable powered tools and other hand-held equipment. 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.Yes, because Bob was on . startxref Looking for NFPA 70E Certification? 0000005050 00000 n View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. Quiz: Electrical Hazards. Effective means of controlling power line hazards include: 0000007116 00000 n Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? b.Electrical tools 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. endobj OSHA 30 Module 6: Personal Protective Equipme, OSHA 30 - Module 16: Recordkeeping & Reporting, OSHA 30 - Module 18: Safety and Health Progra, OSHA 30 - Module 11: Welding, Cutting and Bra, CRJ 200 Limitations (Official-ish) - MODDED (, SERE 100.2 Level A SERE (J3TA-US1329) (Civili, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, E. Russell Johnston, Ferdinand Beer, Phillip Cornwell. 0000420887 00000 n (A) Shotgun sticks. hazard or that their employer is not following OSHA's rules. Explosion. Additional minimum clearance distance is required for power lines carrying over ________. She finds several available in the shop. Is not broken, Question Text: Electrical tools should be grounded with a(n)________. Post warning signs. 3. c. Match the color of the tool to the color of the extension cord. OSHA 29 CFR 1910, Subpart S . OSHA 10 General Industry Topic Exams Answer Key TOPIC EXAM 1: INTRO TO OSHA 1. Potential hazards of electricity are preventable if you: Electricity must always travel in a(n) ________, ________ circuit. How might this event affect the ability of animals to obtain energy to live? h|UnH}+i-. a. Gaseous matter 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. A measure of the energy of motion of the particles in a substance is its _____. Contact utilities for buried power line locations. 2. SCENARIO: You encounter a co-worker on a residential remodeling job. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . b. When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. The floor is covered in water and she is barefoot. 4.Running through doorways. 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). Freeze 1.Is firmly connected OSHA CONSTRUCTION FINAL EXAM Question and Answer Part 10. ly/homeo3b700 Which of the following is a resource within the. Potential hazards of electricity are preventable if you do which of the following listed below? If a defective power tool gives you an electric shock, how might your muscles react? 3 0 obj d.50,000 volts. The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. 2 0 obj Even when the power system is properly grounded, electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment. 0000004208 00000 n Electrocution. Latoya is using a mixing motor to mix pool chemicals in a plastic drum. Question 2: Which of the following are ways . 3.When you are using portable power tools c. Inductive objects a) Door or window edges (B) Switch sticks. No GFCI's were used. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. Using cords or tools with worn insulation or exposed wires. Explosion Flexible Cord Not 3-Wire, Hard Service Variety: A worker received a fatal shock when he was cutting drywall with a metal casing router. -Voltage= a measure of electrical force. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. This is action is also known as creating or completing an electrical circuit. Select the correct answer and then click DONE. 0 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). 0000002122 00000 n a.Extension cords 4.Damaged cover or insulation, When using electric-powered hand tools, do not overload: [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. 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: A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. 1. Underground electrical hazards are: A. b.Metal _.9u'2G_0 Ue]e"x5|Y 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. b.Not wearing insulating shoes or boots when she was handling electrical equipment Ajay needs to use a dewatering pump to drain standing water on a construction site. a.Your thumb. Then answer the questions below. Cardiac arrest or death - A result of electrical shock. Continually audit cords on-site. 3. Select the correct answer and then click DONE. 4. 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 ________ keeps the electricity on its intended path through the conductor. lex has set up a mobile engine testing station in the maintenance area. This may damage your equipment and cause employee injuries. When used on the moon? 0000000016 00000 n The NEC C. Suggestions 1.Missing 0000009628 00000 n 2.Yes, because he is using a portable power tool. Use tools and equipment according to the instructions included in their listing, labeling or certification. Select the correct answer and then click DONE. 0000420277 00000 n While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. q>NmnLNmb$"Iyx1bD9.~Ll. 0000021516 00000 n 1.Using a fiberglass ladder when the possibility exists for contact with electricity. 0000002557 00000 n 4. Improper Use of Extension and Flexible Cords. Quiz Question 4: Which is a preventive measure to prevent hazards while working with power lines? Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. 1.Flammable liquids 0000001646 00000 n stream To be safe, you must think about your job and plan for hazards. What is the primary purpose of properly grounding equipment? Electrical safety quiz answers are given below. 0000002403 00000 n A fault occurred, and with no grounding and no GFCI protection, the worker was electrocuted. 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. Intentionally creating a low-resistance path that connects to the earth. <> When does electricity become hazardous to humans? Draw a line from the item on the left that corresponds to the match on the right. 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. Gloves used for electrical work must be inspected and tested prior to use, and be certified every: A. Explain the purpose and use of the MyPlate symbol. -Damage to internal organs. 1. BE SAFE! 0000001604 00000 n Muscular contraction and nerve damage occur; death likely. 0000057373 00000 n 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. Select the correct answer and then click DONE. The victim was part of a crew that was constructing a concrete wall. 0000001116 00000 n -Severe skin burns. Question 3: If following lock out/tag out procedures, what step should be taken BEFORE you shut down the equipment? The workers administered CPR to the victim, but to no avail. Question 2: It's okay to use extension cords with worn insulation, as long as you are careful about it. Apparently, his hand contracted and he was "locked" to the saw. <> |tYny@YE>LkNj4-czZf"Usw>j\sv3fn},>},KeA s De-energize and ground lines when working near them. 0000420564 00000 n 0000414648 00000 n 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: Best practices with power lines include: The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. One hand drill was not grounded, and the other had no safety plate. Check your employee's electrical safety knowledge through an electrical safety quiz. 4.Good condition of moveable parts, Items that could encourage overheating and cause tools to malfunction or start a fire include: 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+ Select the correct answer and then click DONE. d.Ground Fault Circuit Interrupter, : Another electrical hazard that can cause injury or death in the workplace is a ________ path to ground. 4 0 obj <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>