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Hazards are created when cords, cord connectors, receptacles, and cord- and plug connected equipment are improperly used and maintained. 4,600. He may have dropped the extension cord at the site and not heard the connector break. Electric current cannot exist without an unbroken path to and from the conductor. 4. Using the wrong light bulb wattage; Overloading power strips and outlets; Unprotected electrical outlets; Poor wiring; Defective electrical wires A) 120v . Ajay needs to use a dewatering pump to drain standing water on a construction site. [Flexible Cords and Power Tools]. NFPA 70E: Standard for Electrical Safety in the Workplace Dust The victim was totally deaf in one ear and suffered diminished hearing in the other. Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. a.Yes, because the electrical shock caused the fall. Outlets 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. Provides information about the hazards that electrical workers may experience as a part of their jobs. Which of the following can be caused by exposure to an arc flash? b.30,000 volts 4.Combustible dust, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Electrocution. 30 days B. 0000002195 00000 n True. Course 812 Module 7 OSHA Focus Four Hazards: Electrocution - OSHAcademy If a worker has been retaliated against for using their rights, they 12 months C. 6 months D. Never Q23. The ________ keeps the electricity on its intended path through the conductor. How fast would the ball be moving at the moment of release? 3. 2.Placed along a wall. 0000003413 00000 n Effective means of controlling power line hazards include: c.Wood 0000057373 00000 n Quiz Question 5: A/an ___________ is a unit of measurement for electrical resistance. Which of the following factors determine how severe an electrical injury might be? 0000001896 00000 n 4.Running through doorways. Regarding hand protection employers should: A. 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. 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. Electrical Contractors Industry. Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. Electrocution was the second leading cause of worker deaths on construction sites in the United States in 2011. Which group would be more accurate when used in an accelerating spaceship? c.Guaranteed Fault Circuit Interrupter She has an older drill with a steel housing and a 3-prong plug. 0000055319 00000 n What is the primary purpose of properly grounding equipment? using a 30-amp breaker in a system with 15- or 20-amp receptacles. 2. 0000419562 00000 n 4.Cardiac arrest 3.Draped over equipment. (B) Switch sticks. . 0000002403 00000 n Cardiac arrest or death - A result of electrical shock. Two of the extension cords had no ground prongs, and some of them were repaired with electrical tape. 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. SCENARIO: You encounter a co-worker on a residential remodeling job. What is the minimum clearance distance you must maintain from the power lines? Select the correct answer and then click DONE. stream 1.Fingernails As the victim climbed down a makeshift ladder, he shifted the saw from his right hand to his left, and was shocked. 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. Other protective measures include guarding or insulating the lines. When selecting the right extension cord, a good rule of thumb is to match the thickness of the extension cord to the thickness of: It's okay to use extension cords with worn insulation, as . One worker, holding the deadman's switch, received a shock from a ground fault in the auger and was knocked back from the machine. OSHA 10 - Exit Routes, Emergency Action Plans, The Analysis and Design of Linear Circuits, Albert J. Rosa, Gregory J. Toussaint, Roland E. Thomas. Water -Damage to internal organs. Question 3: A/an ____________ is a unit of measurement for electrical resistance. ( 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. a.Extension cords @*@;z}IAH@3MsgU1Dnf@agLahpCn@&b|-^;b0k*!3VYy,jy%( Z%|\Jg"dRp-Wbz3QJS%k9p_WtZ 0000089142 00000 n (E) a, b, and c. 2. 3. Select the correct answer and then click DONE. 3.Something that causes current to flow through the . What are the 4 main type of hazards? [Ultimate Guide!] Is not painted over De-energize and ground lines when working near them. 1.Damaged cover or insulation 0000001116 00000 n d) All of the above. b.Electrical tools b.Ground Fault Critical Interrupter Know glove capability VS hazard anticipated (exposure to chemicals, heat, or flames). This is action is also known as creating or completing an electrical circuit. %PDF-1.5 0000006893 00000 n lb MKS D. Have an ANSI sticker and an expiration date. Electricity for power tools was supplied from an exterior 120-volt, grounded AC receptacle located at the back of the residence. 4. Yes, because he will be using electricity near water. 1.Missing or broken path to ground. Select the correct answer and then click DONE. 2 0 obj =EAn`u!d, |\~Y>ZF( dnLN\2vP6 >sSjgh2:Lmqx#a[G2{h$zW]_:@Lvr)2T:R-/ `&~O4j)>1P*M 5>F:1B.g!AR Before work began, the company safety director made sure that insulated line hoses were placed over sections of the the power line near the jobsite and that a safety clearance zone was marked off for arriving cement trucks. 5.Twitch, Electrical shock may result in: Which one of these methods MOST effectively protects machines, tools, and operators against damage from electrical current? 0000015549 00000 n Improper Use of Extension and Flexible Cords. b.A fast-acting switch monitoring current flow a. Electrical Hazards - SSOE Group OSHA 10-Hour Safety Course - Electrical Safety Page 5 of 5 Use the three-stage safety model to stay safe: recognize, evaluate, and control hazards. Electrical Safety Quiz-Test Your Electrical Safety Knowledge Examples of Equipment That Can Contact Power Lines. 2.Grease Ground all power supply systems, electrical circuits, and electrical equipment. 0000056642 00000 n 2. 5>vB35Plm$\4{U[lU`t~.vJGmFO^@+ cGPzNY*oS(m%q{Agp When it completes a circuit through the body. 0000007464 00000 n 0000001814 00000 n -Grounding= a conductive connection to the earth which acts as a protective measure. <> Which of the following are insulators of electricity? c. Inductive objects 2.The person's physical condition Lockout/tagout procedures. 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. %PDF-1.4 % OSHA requires the testing of a volt meter after a voltage test on voltage above_____. -Falls. 0000420564 00000 n a.Electricity 4.Flex A 120v. Quiz Question 4: Which is a preventive measure to prevent hazards while working with power lines? 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. xref 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: Select the correct answer and then click DONE. Flexible Cord Not 3-Wire, Hard Service Variety: A worker received a fatal shock when he was cutting drywall with a metal casing router. 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. Hand-operated metal shifting ropes or cables of electric elevators. Call ________ prior to digging to be connected with your local One Call Center to have all underground lines located by the utility company. A 56-year-old construction laborer was removing forms from a concrete wall poured several days earlier. (D) None of the above. Electricity must follow an uninterrupted loop from the power source to the equipment and back to the power source or ________. 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. Contact utilities for buried power line locations. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. Additional minimum clearance distance is required for power lines carrying over ________. 2.Using an aluminum ladder when the possibility exists for contact with electricity. What is the output of the program in Exercise 17, if first = 26 and second = 8? 0000004273 00000 n Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . 0000001861 00000 n A. indoors. [, 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 floor is covered in water and she is barefoot. 0000024814 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. 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. The workers had removed their shirts and were sweating. 2.Something to transport the electrical current -- A conductor. 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. Introduction To Osha Quiz Answers1) Which of the following activities Follow manufacturers' recommended testing procedure to insure GFCI is working correctly. While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. One hand drill was not grounded, and the other had no safety plate. Fatal electrocution is the main risk, but burns and falls from elevations are also hazards. On the day of the incident, the victim plugged in a damaged extension cord and laid it out towards the bulkhead. Use the terms (freezing, gas, liquid, physical changes, solubility, solution, temperature, volume) to complete the sentence. Quiz Question 9: Conductor insulation must be approved for the ___________ of use? hazard or that their employer is not following OSHA's rules. a. Gaseous matter The first worker knocked the auger off the victim, but saw that the electric cord was wrapped around the victim's thigh. 5 feet The victim collapsed into the lake and sank 4-1/2 feet to the bottom. Electricity becomes hazardous when it takes an unintended path to complete the ________. 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. d.Water, Other electrical hazards in the workplace include: 3.When you are using portable power tools 0000005042 00000 n 0000009628 00000 n B. 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. When an electric shock occurs, your muscles may: When the victim reached down to connect the choker to the hoist cable, he suddenly collapsed. d.The body of the power tool. OSHA: Air Monitoring & Medical Surveillance, 5 ANO - RETOMANDO ARTIGO, SUBSTANTIVO E ADJE. PDF Name: Date: Test Electrical Safety Quiz SELECT THE BEST ANSWER. 0000013999 00000 n c. Extend the reach of the power tool. a.Supply power for tools or equipment on a temporary or short-term basis. 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. c.A measurement of electricity I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB 0000002557 00000 n 0000002876 00000 n <<7628BB2D46738F42B2FC6393656F4718>]>> Question 2: Which of the following are ways . A. wrap tape around the damaged spot to prevent electrical shocks. Use only extension cords that are 3-wire type. You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. (b) The same reaction can also be classified as a redox reaction. Overhead and buried power lines at your site are especially hazardous because they carry extremely high voltage. A measure of the energy of motion of the particles in a substance is its _____.