Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: 4.Cardiac arrest <>>> Hazards are created when cords, cord connectors, receptacles, and cord- and plug connected equipment are improperly used and maintained. 0000414648 00000 n g]+fn_m{mja_0Y w endstream endobj 189 0 obj <> endobj 190 0 obj <>stream The router's 3-wire power cord was spliced to a 2-wire cord and plug set which was not rated for hard service. Used across walkways. d. No, because an extension cord would not provide enough power. Using a dry wood ladder when the possibility exists for contact with electricity. Examples of Equipment That Can Contact Power Lines. 3.Vapor 0000013999 00000 n 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. c.Gasoline Select the correct answer and then click DONE. Select the correct answer and then click DONE. d. heart attacks. c. Extend the reach of the power tool. 2. 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. 4 0 obj 2.Yes, because he is using a portable power tool. :$#k9BPnZ{Qqe/reKy,'ZlB# Select the correct answer and then click DONE. 0000012360 00000 n 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. 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Use only extension cords that are 3-wire type. 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. (B) Switch sticks. Burns. Power was supplied through two extension cords from a nearby residence. A worker was operating a " electric chisel when an electrical fault occurred in the casing of the tool, causing him to be fatally electrocuted. 2.Loss of muscle control Potential hazards of electricity are preventable if you do which of the following listed below? D 600v. Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. Of the following choices, which are frequent electrical hazards 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. 0000001731 00000 n 0000421627 00000 n 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. Be sure equipment that has been shop fabricated or altered is in compliance. When an electric shock occurs, your muscles may: b. Deductive objects 0000002403 00000 n (C) Hot sticks. The auger then fell across the other worker, the 24-year-old victim. c) Establish and enact an assured equipment grounding conductor program (AEGCP) 4. 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. d.The body of the power tool. Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. The ground wire was not attached on the male end of the cord's plug. -Damage to internal organs. 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. 4 0 obj Death is probable. Additional minimum clearance distance is required for power lines carrying over ________. c.A measurement of electricity 3 0 obj 3.ack of ground fault protection. <> C. near water. lb MKS Lx*jWP# /c2)|]NXqAx>=~'[ If the insulation on the tool's power cord is damaged and you touch this area while grounded, the electricity will ________. Electrical safety quiz answers are given below. Apparently, his hand contracted and he was "locked" to the saw. 0000002557 00000 n Freeze 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. 0000420277 00000 n a) Ensure overhead power line safety d.Alert workers of any water in the area, GFCI is an acronym for: Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. Call ________ prior to digging to be connected with your local One Call Center to have all underground lines located by the utility company. The workers had removed their shirts and were sweating. These short objective type questions with answers are very important for competitive exams as well as Board exams. c.Touching the motor Select the choices that accurately define the common electrical term. c.falls. (See NFPA 70E-2021 Article 130 and OSHA subpart S part . b.Match the thickness of the extension cord to the thickness of the nail gun's power cord. It is important to note that NFPA 70E is a . 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. Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. The \rule{1cm}{1pt} artery carries deoxygenated blood from the heart to the lungs. Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. How will she choose the correct cord? %%EOF If a worker has been retaliated against for using their rights, they 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. What was Latoya's first mistake? Which of these can be used as insulating live-line tools for electrical protection. Select the correct answer and then click DONE. Extension cords are used to: 0000001495 00000 n One handle has a deadman's switch. . 0000108653 00000 n Which of the following factors determine how severe an electrical injury might be? 182 0 obj <> endobj xref 182 41 0000000016 00000 n Which group would be more accurate when used in an accelerating spaceship? 1.Pain 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 . The auger has a one-quarter horsepower motor encased in a metal housing with two handles. Fatal electrocution is the main risk, but burns and falls from elevations are also hazards. 0000056642 00000 n 0000005716 00000 n When inspecting extension cords, look for: When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. 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. hazard or that their employer is not following OSHA's rules. 0000011060 00000 n [29 CFR 1926.416(a)(1)]. 0000005042 00000 n 0000001646 00000 n If the electrical conductors become exposed, there is a danger of shocks, burns, or fire. 1. A worker was removing a metal antenna when it made electrical contact with a 7200-volt power transmission line. Select the correct answer and then click on DONE. Visually inspect all electrical equipment before use. 3. c.Power lines V1?`T`P``ya W3 |"H36K1A@, rO(V[|NAT30 qI? endstream endobj 221 0 obj <>/Filter/FlateDecode/Index[30 152]/Length 27/Size 182/Type/XRef/W[1 1 1]>>stream -Rubber. 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. Get All Answers to OSHA 30 Construction Final Exam. ( Using cords or tools with worn insulation or exposed wires. a.Yes, because the electrical shock caused the fall. 30 days B. Which of the following are conductor of electricity? c.15 feet <<7628BB2D46738F42B2FC6393656F4718>]>> No GFCI's were used. Question 2: Which of the following are ways . Hand-operated metal shifting ropes or cables of electric elevators. (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. When current travels through your body - Definition of electric shock. D. Communicate the hazard to the crew and subs, use signs and bar E. Both C and D Q22. b.The tool's power cord. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. 3 OSHA requires the testing of a volt meter after a voltage test on voltage above_____. Underground electrical hazards are: A. 5>vB35Plm$\4{U[lU`t~.vJGmFO^@+ cGPzNY*oS(m%q{Agp Ground all power supply systems, electrical circuits, and electrical equipment. . a) Door or window edges You need to evaluate the situation you are in and assess your . 0000014257 00000 n [, Use all equipment according to the manufacturer's instructions. The contact lasts for 5 seconds before someone is able to shut off the power. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. c.911 Gloves used for electrical work must be inspected and tested prior to use, and be certified every: A. vpfuI)],s 3.No, because he will not be touching any grounded material when using the tool. 0000005632 00000 n Electrical Contractors Industry. 0000422244 00000 n c.Wood gYpV:+ Electrical Safety Multiple Choice Questions and Answers for competitive exams. 0000004273 00000 n 0000004208 00000 n Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. specifically addresses electrical protective devices. 1.Is firmly connected Select the correct answer and then click DONE. Attaching ungrounded, two-prong adapter plugs to three-prong cords and tools. 0000004921 00000 n endobj uVNSF!UTRQ91uR,6@hCH}]GAlaPh)NeT$iQ89S9|?4wahU ltz9 PH[$I&VX9WG%K~1{u8M:D"+HLEy 3@NR^z!rB^?RyOj;'Lof. c) Age b.Yes, as it would be too expensive to install more permanent wiring and receptacles. What do tripped circuit breakers and blown fuses indicate? -Severe skin burns. 0000420564 00000 n 1.Is faulty a.Conductive objects 0000007427 00000 n Frames of non-electrically driven elevator cars to which electric conductors are attached. A) 120v . Electrical hazards like frayed cords, missing ground pins, improper wiring or the harm that these hazards pose. Lockout/tagout procedures. 2.Grounding Using the wrong light bulb wattage; Overloading power strips and outlets; Unprotected electrical outlets; Poor wiring; Defective electrical wires The scaffold had been constructed only 21 horizontal inches across from a 7,620-volt power line. 4.No, because he does not need to use an extension cord. To be safe, you must think about your job and plan for hazards. Quiz Question 3: Power cords can be damaged by which of the following? x_HSqnwmky54YLzeStJi# TZObFT*.#BQF/Q !DP#vr-\DM<6V-2'I5l6)Z@^m=}c3-aUOo6rr V-Y3d6HABmjD $TQCvK*eg&|Y596#H\ Electrocution. Electric current cannot exist without an unbroken path to and from the conductor. _.9u'2G_0 Ue]e"x5|Y Select the correct answer and then click DONE. 0000005406 00000 n When he grasped the handle of the bucket to pull it down, the crane cable came into contact with the overhead line. 3. 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? The presence of ______ can turn you, your equipment, or insulators like wood, into conductors. 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. Quiz Question 2: Which is acceptable when using powdered tools? 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. (D) None of the above. 1.Missing b.Metal Use only cords, connection devices, and fittings that are equipped with strain relief. OSHA 29 CFR 1910, Subpart P . View Answer Answer: 600v 4 . 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! A) Identify; Castigate; C) Evaluate; D) Modify; 3. Is not broken, Question Text: Electrical tools should be grounded with a(n)________. -Grounding= a conductive connection to the earth which acts as a protective measure. The accident site was wet; also, humidity was high and the victim was sweating. b.Not wearing insulating shoes or boots when she was handling electrical equipment OSHA Pros, LLC is an authorized provider of 360 Training, an OSHA-Accepted Provider, offering training and certification courses for NFPA 70E-Standard, and Draw a line from the item on the left that corresponds to the match on the right. 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. Looking for NFPA 70E Certification? OSHA requires the testing of a volt meter after a voltage test on voltage above_____. Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. 3.Cramp d.Ground Fault Circuit Interrupter, : Another electrical hazard that can cause injury or death in the workplace is a ________ path to ground. endobj 0000108920 00000 n 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. 3. 0000055319 00000 n 0000010155 00000 n OSHA Safety and Health Topics Page. Determine duration, frequency, degree of exposure to hazards and physical stress. 0 [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. View Best Practices with Power Lines Quiz OSHA 30.docx from OSHA 30 at Columbia Southern University. d.Metal, Over half of all deaths caused by electricity result from contact with ________. The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. (A) Shotgun sticks. What is the most common, non-fatal, electrical shock-related injury? The small electrical current enters his body through his left leg. Select the correct answer and then click DONE. b.Electrical tools A fault occurred, and with no grounding and no GFCI protection, the worker was electrocuted. Identify the oxidizing and reducing agents. Muscular contraction and nerve damage occur; death likely. a.Standing in water 3. q>NmnLNmb$"Iyx1bD9.~Ll. 2.Loose screws The victim was part of a crew that was constructing a concrete wall. Which of the following are insulators of electricity?