hbb``b``3N0  endstream endobj 183 0 obj <>/Metadata 28 0 R/Names 184 0 R/Outlines 23 0 R/Pages 27 0 R/StructTreeRoot 30 0 R/Type/Catalog/ViewerPreferences<>>> endobj 184 0 obj <> endobj 185 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 186 0 obj <> endobj 187 0 obj <> endobj 188 0 obj <>stream You discover the electrical cord on a drill has been damaged and some of the cord's insulation is missing. 0000021516 00000 n BE SAFE! Seven employees of a masonry company were erecting a brick wall from a tubular, welded-frame scaffold approximately 24 feet high. c.40,000 volts Do not remove ground prongs from cord- and plug-connected equipment or extension cords. Electric current cannot exist without an unbroken path to and from the conductor. c) Age 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. 5 feet . a.Your thumb. What is the output of the program in Exercise 17, if first = 26 and second = 8? 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 following references aid in recognizing hazards associated with electrical work. s\A0W+ 0000001896 00000 n How might this event affect the ability of animals to obtain energy to live? The individual's perspiration-soaked clothing/body contacted bare exposed conductors on one of the cords, causing an electrocution. Quiz Question 2: Which is acceptable when using powdered tools? )KL3C?e%Y92$,]^)kmR/!8\ JF N'bT\U1+tc+&:'ZuGi!UeUrE [?CrU.&|#@Ed,=2UF]r/n/{v-;v>%/~;[*AxBU,-#!uyFGR,Wv[ cOzObnZfI4ob:pf "~ .iBE@mOs:Os5U9cnU` Vd"F'4Bm?>}hyRQyrX0U026h7#L'. -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. Work performed on an electrical system within reaching distance of energized components is_____work. The light fixture, which served as a ground, was known to be faulty for at least 5 months before the incident. d) All of the above. 1.Is faulty Reportedly, he was shocked throughout the morning, and he had replaced one of the extension cords in an effort to eliminate the shocks. 2.Loose screws (C) Hot sticks. d. heart attacks. 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. and more. b. [. A 20-year-old bricklayer standing on the work platform in contact with the main scaffold was electrocuted. a.related to muscle damage. A Safety Electrical One Line Diagram should be used to _____ all sources of electrical energy. Select the correct answer and then click DONE. Quiz Question 7: Which is not an insulator? 0000002733 00000 n Question 1: Which of the following is a danger of electricity? 3.Clear 2.Skin Death is probable. 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. As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. (B) Switch sticks. 0000004884 00000 n c. Match the color of the tool to the color of the extension cord. 2. Electricity to the auger was supplied by a series of 50-foot extension cords running to an adjacent property. Which of the following can be caused by exposure to an arc flash? The floor is covered in water and she is barefoot. You can classify scales for weighing objects as those that use springs and those that use standard masses to balance unknown masses. Look for overhead power lines and buried power line indicators. 5.Twitch, Electrical shock may result in: 0000414648 00000 n 0000015549 00000 n Effective means of controlling power line hazards include: 15,000 milliamps (15 amps) Lowest overcurrent at which a typical fuse or circuit breaker opens a circuit! Study with Quizlet and memorize flashcards containing terms like Bob is asked to repair some overhead wiring, requiring the use a ladder. a.Electricity Besides personal bodily injury, what other electrical hazards can be found in the workplace? Switch 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. When an electric shock occurs, your muscles may: 2.Using an aluminum ladder when the possibility exists for contact with electricity. %PDF-1.5 Explosion. [Flexible Cords and Power Tools]. D. near other electrical equipment. 4. The workers administered CPR to the victim, but to no avail. While attempting to unplug the compressor from the extension cord, the employee was fatally shocked. 0000005042 00000 n 0000001672 00000 n c.The outlet. Frames of non-electrically driven elevator cars to which electric conductors are attached. b) Staples a.Conductive objects C. near water. 0000010603 00000 n -Wood. Protection is lost because it will not trip when the system's load has been exceeded. 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). xref Electrical current travels through insulated ________. 0000002403 00000 n Quiz Question 10: Ground-fault circuit interrupters must be used for all of the following except? C 277v. Of the following choices, which are frequent electrical hazards hazard or that their employer is not following OSHA's rules. 2.Loss of muscle control Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. 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. Overview. Which of the following part of you body can burn if you come in contact with electricity? Frequently inspect electrical systems to insure that the path to ground is continuous. 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). Cardiac arrest or death - A result of electrical shock. It is important to note that NFPA 70E is a . 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. Find the volume of the parallelepiped determined by the vertices (1,1,1),(4,7,2) . 0000007464 00000 n h|UnH}+i-. Which of these can be used as insulating live-line tools for electrical protection. 2.Placed along a wall. De-energizing Draw a line from the item on the left that corresponds to the match on the right. 1.Missing Lx*jWP# /c2)|]NXqAx>=~'[ Using equipment outdoors that is labeled for use only in dry, indoor locations. 30 days B. Electrical Hazards Electrical hazards can be found in nearly every roofing work site. a.20,000 volts Explain the purpose and use of the MyPlate symbol. Use only equipment that is approved to meet OSHA standards. Quiz Question 6: Which of these is not a type of Ground Fault Circuit Adapter? Electricity becomes hazardous when it takes an unintended path to complete the ________. endobj c.Guaranteed Fault Circuit Interrupter Latoya is using a mixing motor to mix pool chemicals in a plastic drum. De-energize and ground lines when working near them. s\A0W+GA?~G?nnnnnnnnnnnn>>{Wrbrbrbrb sbZef'N(:QvD":1vbo7o7o7W*_bTs6ivyU,;dFW` { endstream endobj 191 0 obj [/ICCBased 211 0 R] endobj 192 0 obj <> endobj 193 0 obj <> endobj 194 0 obj <> endobj 195 0 obj <> endobj 196 0 obj <>stream d.Metal, Over half of all deaths caused by electricity result from contact with ________. Remove cords from receptacles by pulling on the plugs, not the cords. Using tools and equipment that can contact power lines increases the risk. Power was supplied through two extension cords from a nearby residence. 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. 0000017163 00000 n 3.The length of time the body is in contact with electricity Visually inspect all electrical equipment before use. The insulation on the extension cord was cut through and exposed bare, energized conductors which made contact with the ladder. c. No, because the electricity is needed on a long-term basis. Question 3: If following lock out/tag out procedures, what step should be taken BEFORE you shut down the equipment? Examples of Equipment That Can Contact Power Lines. 1 0 obj uVNSF!UTRQ91uR,6@hCH}]GAlaPh)NeT$iQ89S9|?4wahU ltz9 PH[$I&VX9WG%K~1{u8M:D"+HLEy 3@NR^z!rB^?RyOj;'Lof. What is the minimum clearance distance you must maintain from the power lines? 4.Organs, The presence of ________ can turn you, your equipment, or insulators like wood into conductors. In addition to contact with power lines, the top electrical hazards include: 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. Lockout/tagout procedures. 0000017336 00000 n Use non-conductive wood or fiberglass ladders when working near power lines. D. Have an ANSI sticker and an expiration date. Electrical Safety Multiple Choice Questions and Answers for competitive exams. Arc Flash. 0000004946 00000 n When the energized conductor made contact with the ladder, the path to ground included the worker's body, resulting in death. If a defective power tool gives you an electric shock, how might your muscles react? 0000006152 00000 n He may have dropped the extension cord at the site and not heard the connector break. 4. 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. 0000003640 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. b.Ground Fault Critical Interrupter stream 1.Extension cords He plans to use it over a period of at least six months. 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. 2.Flooding Select the correct answer and then click DONE. 0000006866 00000 n 0000068035 00000 n Using circuit breakers or fuses with the wrong rating for over-current protection, e.g. B 208v. 0000004208 00000 n a.Standing in water Extension cords had poor splices, no grounds, and reversed polarity. Should Ajay use a GFCI? Electrical hazards expose workers to the following: Burns: Three types; electrical, arc flash, or thermal contact. xb```VVF A10p,``Pp`hhdpn``r`L:[ I,aZ4Knj21 `ny; Ge7t@OrMx)"cx&e:[~J%aUJ\*t 1.A source of electrical current to flow. Question 4: When a worker receives an electric shock, first aid must start within ___________ minutes. endobj A fault occurred, and with no grounding and no GFCI protection, the worker was electrocuted. Electricity will form a "path" or "loop". 3.Tears The victim was totally deaf in one ear and suffered diminished hearing in the other. 0000014257 00000 n I;C`_;LV'd,|#H--e`( ')'RpAgA7O`?%68SB As he is working on the wiring, he receives an electrical shock that knocks him backward and causes him to fall off the ladder. d.Adapter, What is a GFCI? Contact utilities for buried power line locations. (a) Describe the reaction between the hydride ion and water in terms of a Bronsted acid-base reaction. Question 2: Which of the following are ways employers must protect their employees on the workplace? After the wall was poured, one driver cleaned the loading chute of his cement truck with a water hose mounted on the truck. Ground metal parts of the following non-electrical equipment, as specified by the OSHA standard [, Frames and tracks of electrically operated. b.A fast-acting switch monitoring current flow Continually audit cords on-site. To avoid injury or death, you must understand and recognize hazards. 0000004921 00000 n c.Power lines 12 months C. 6 months D. Never Q23. 1. No GFCI's were used. 0000001814 00000 n