c.Guaranteed Fault Circuit Interrupter 0000421920 00000 n 0000004444 00000 n 0000003254 00000 n No GFCI's were used. Select the correct answer and then click DONE. When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. A fault occurred, and with no grounding and no GFCI protection, the worker was electrocuted. Use tools and equipment according to the instructions included in their listing, labeling or certification. Hand-operated metal shifting ropes or cables of electric elevators. Fire Safe operation of hand and portable powered tools and other hand-held equipment. Electrical current travels through insulated ________. b) Staples As he removed the forms, he wrapped them with a length of cable called a choker, which was to be attached to a crane. b.Yes, as it would be too expensive to install more permanent wiring and receptacles. d.Metal, Over half of all deaths caused by electricity result from contact with ________. Question 2: It's okay to use extension cords with worn insulation, as long as you are careful about it. 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. 0000013716 00000 n a.Electricity specifically addresses electrical protective devices. <>>> 4.No, because he does not need to use an extension cord. 3. Explain the purpose and use of the MyPlate symbol. Electricity to operate portable power tools was supplied by a temporary service pole 50 feet away. Do not remove ground prongs from cord- and plug-connected equipment or extension cords. b.Electrical tools What was Latoya's first mistake? Draw a line from the item on the left that corresponds to the match on the right. 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). Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. d. No, because an extension cord would not provide enough power. 1.Using a fiberglass ladder when the possibility exists for contact with electricity. Underground electrical hazards are: A. 0 0000001646 00000 n c.A measurement of electricity Question 3: If following lock out/tag out procedures, what step should be taken BEFORE you shut down the equipment? Electricity will form a "path" or "loop". As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. 4. If the insulation on the tool's power cord is damaged and you touch this area while grounded, the electricity will ________. d.Adapter, What is a GFCI? Latoya is using a mixing motor to mix pool chemicals in a plastic drum. 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). trailer 4 0 obj Select the correct answer and then click DONE. 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. b.30,000 volts 0000001861 00000 n He plans to use it over a period of at least six months. b+t6W' te+.W_{8u7Dt@1c. 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. 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 Quiz Question 5: A/an ___________ is a unit of measurement for electrical resistance. 4.Circuit breakers, When inspecting power tools, look for: 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. b.Metal 0000002385 00000 n Regarding hand protection employers should: A. Select the correct answer and then click DONE. (b) The same reaction can also be classified as a redox reaction. b.Rod Improper Use of Extension and Flexible Cords. 0000018681 00000 n 0000021516 00000 n 3. Select the correct answer and then click DONE. -Falls. % 0000003413 00000 n 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. 2.Skin In 2017, there were over ______________ electrical related violations cited by OSHA in the workplace. 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! [. 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. 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. High humidity If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. d. 20 feet. . Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. The following are electrical hazards: Shock. Freeze 2.Is working properly 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. 0000005632 00000 n Using cords or tools with worn insulation or exposed wires. Quiz Question 2: Which is acceptable when using powdered tools? The workers administered CPR to the victim, but to no avail. Select the correct answer and then click DONE. d) All of the above. This is action is also known as creating or completing an electrical circuit. 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 Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. When current travels through your body - Definition of electric shock. a.Extension cords Lx*jWP# /c2)|]NXqAx>=~'[ C 277v. (D) None of the above. Select the correct answer and then click DONE. Both the operator and the victim failed to notice that the boom had contacted a 2,400-volt overhead power line. c.Wood The NEC C. Suggestions H. 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. 2 0 obj Metal partitions, grill work, and similar metal enclosures around equipment of over 1kV between conductors. 0000007116 00000 n Using modified cords or tools, e.g., removing ground prongs, face plates, insulation, etc. 0000015549 00000 n 3 0 obj When it completes a circuit through the body. 10,000 milliamps (10 amps) Cardiac arrest and severe burns occur. Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. B 208v. 3 OSHA requires the testing of a volt meter after a voltage test on voltage above_____. Before using the equipment, be sure that the ground wire: Ajay needs to use a dewatering pump to drain standing water on a construction site. -Rubber. Of the following choices, which are frequent electrical hazards (E) a, b, and c. 2. The victim signaled the operator of the crane to extend the boom and lower the hoist cable. d. Match the outlet prongs to the extension cord. A. indoors. 3.Tears OSHA 10 - Exit Routes, Emergency Action Plans, The Analysis and Design of Linear Circuits, Albert J. Rosa, Gregory J. Toussaint, Roland E. Thomas. 5. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . He may have dropped the extension cord at the site and not heard the connector break. 4.The amount of current, An electrical burn may affect: 0000002150 00000 n Contact utilities for buried power line locations. Easy to identify 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. Apparently, his hand contracted and he was "locked" to the saw. 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. What is the primary purpose of properly grounding equipment? q>NmnLNmb$"Iyx1bD9.~Ll. _5JKy. 1.Missing Noise, : ________ or heavy perspiration can cause electricity to take an unintended path. Flexible Cord Not 3-Wire, Hard Service Variety: A worker received a fatal shock when he was cutting drywall with a metal casing router. 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+ OSHA will keep all identities confidential. and more. 0000007694 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. The source of the shocks -- the saw -- was not replaced. 12 months C. 6 months D. Never Q23. 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. -Grounding= a conductive connection to the earth which acts as a protective measure. Looking for NFPA 70E Certification? b. Deductive objects a. %PDF-1.4 % Which of the following are caused by contact with electricity? gYpV:+ 1452 0 obj <> endobj Extension cords had poor splices, no grounds, and reversed polarity. 0000002876 00000 n Others, such as office workers and sales people, work with electricity indirectly and may also be exposed to electrical hazards. Apply a warning tag to any defective tool and do not use it until the problem has been corrected. 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) Shotgun sticks. endobj The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. h|UnH}+i-. [29 CFR 1926.416(a)(1)]. 4.Broken. %%EOF One handle has a deadman's switch. a.Shut off power within a fraction of a second Should he use an extension cord to power it? b. The auger then fell across the other worker, the 24-year-old victim. 0000001495 00000 n Which of the following factors determine how severe an electrical injury might be? 0000108920 00000 n Besides personal bodily injury, what other electrical hazards can be found in the workplace? When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB 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.

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