100 Questions on Electrical Safety Study Guide

Transcription

1 100 Questions on Electrical Safety Study Guide Be advised that only 95 of 100 questions are presented here for the purpose of discouraging cheating on the final exam. 1. Why is electrical safety important? A. Electrical injuries account for a major portion of injuries and deaths. B. Electrical Hazards are not readily visible. C. Understanding electrical hazards can reduce the risks associated with electrical installations.. 2. What is the most important practice to avoid an incident? A. Proper planning B. Proper PPE C. Proper supervision D. Always assume a circuit is energized 3. What safety training is required? Workers must receive information regarding: A. All hazards associated with work task B. How to minimize or avoid exposure to any hazards C. Any change that could affect safety 4. How is a person exposed to shock or electrocution? A. By contacting an electrical conductor that is exposed but not energized. B. By contacting an electrical conductor that is both unexposed and deenergized. C. By contacting an electrical conductor that is both insulated and energized. D. By contacting an electrical conductor that is both exposed and energized. 5. Is lockout/tagout enough to eliminate exposure to electrical energy? A. Yes B. No

2 6. Is a journeyman electrician a qualified person? A. Not possible B. Only if he or she has at least 10 years experience C. Only if he or she has proved to be adept at accomplishing the physical aspects of a work task D. Only if he or she is learned in specific electrical hazards 7. How do I predict incident energy? A. There is no way to even estimate. B. There are several ways to estimate and no way to predict with 100% certainty. C. There are several ways to estimate and only one way to be certain. D. There are several ways to predict with 100% certainty. 8. What is the hazard associated with a live part? A. Shock and electrocution B. Arc flash and arc blast C. A and B D. Hazard is not necessarily associated with a live part. 9. How do I justify work on or near live parts? A. When there is sufficient insulation B. When it will be too difficult or time consuming to deenergize the electrical circuit C. When deenergizing the circuit would actually create a greater risk D. None of the above 10. Does a third party label provide assurance that the equipment is safe? A. It provides assurance that equipment is safe under some conditions. B. It provides assurance that equipment is safe under all conditions. C. It does not provide assurance that equipment is safe under any conditions. 11. What is the responsibility of an owner? A. Ensure no hazards exist. B. Ensure contractors are aware of all hazards. C. Ensure contractors properly use and maintain PPE. D. B and C

3 12. What is the responsibility of an employee? A. Implementing the requirements of the employer s electrical safety program B. Ensuring the worksite is safe C. Keeping accessible records of all previous training D. Collaborating with contractors 13. What part does maintenance play in controlling exposure to an electrical hazard? A. Eliminates any exposure B. Prevents any deterioration C. Reduces unnecessary exposure D. A and B 14. What is an electrical safety program? A. A set of general guidelines and recommendations to promote safety while performing electrical work tasks B. Required training for almost all electrical work tasks C. Written policy documents that ensure consistency within a company D. A nationally recognized, standardized set of safety rules and regulations for electricians and others who perform electrical work tasks. 15. What is the role of an employee in developing an electrical safety program? A. This is the responsibility of the employer; the employee should not be involved in any capacity. B. Responsible for implementation and can assist in developing procedures and practices. C. Employees are solely responsible for developing and maintaining the electrical safety program, which requires hands on experience and familiarity with the work tasks.

4 16. Why is auditing important? A. Auditing indicates whether defined requirements are adequate. B. Auditing allows employers to monitor and track injuries or incidents. C. Auditing identifies employees who do not meet training requirements. 17. Who writes NFPA 70E? E. ANSI F. OSHA G. Regulations Governing Committee Projects H. The public 18. Does OSHA enforce NFPA 70E? A. Always B. Often C. Rarely D. Never 19. Who enforces NFPA 70E? A. NFPA 70E is voluntary and cannot be enforced. B. OSHA and other national safety groups C. Organizations in need of exceptional or unusual protective measures D. Organizations that want to 20. What is so important about the notes that follow the tables in consensus standards? A. The table notes tell what information is needed for the default condition to apply. B. The limiting characteristics of a complex process are defined by the information contained in the notes. C. The notes indicate when additional information or analysis is necessary.

5 21. What is a hazard/risk analysis? A. Process to identify hazards and quantify likelihood of incidents or injuries. B. Incident reports are analyzed to determine injury and death rates associated with specific tasks. C. Regular worksite inspections by a competent person. D. A mathematical formula invented by OSHA. 22. Why is risk included in the analysis? A. Risk is associated with the chance that an incident will occur B. Risk is associated with the chance that an injury will occur. C. To determine whether the risk is acceptably low enough. 23. What are the components of a hazard analysis? A. Identifying electrical hazards B. Identifying nonelectrical hazards C. Identifying fall and falling object hazards 24. Who must perform a hazard/risk analysis? A. The workers followed by the safety manager B. The safety manager followed by the immediate supervisor C. The safety manager and immediate supervisor followed by the workers D. The workers followed by the immediate supervisor

6 25. What personal protective equipment (PPE) protects a person from shock or electrocution? A. Anything made from rubber B. Insulating products adequately rated by the manufacturer C. FR clothing with an arc rating at least equal to the estimated incident energy 26. Why must conductive apparel such as rings be removed when working on or near live parts? A. Conductive apparel can create a short circuit. B. Metal components of apparel absorb and retain thermal energy from an arcing fault. C. If the metal component is in a worker s pocket, the protective nature of the flame resistant PPE is decreased. 27. What is FR clothing? A. Clothing treated with a chemical to resist ignition B. Clothing that protects the wearer from shock or electrocution C. Clothing that is assigned an arc rating in calories per square centimeter D. Flame retardant clothing 28. When can I use the table method to determine FR protective equipment? A. Under appropriate conditions according to the notes following the table in NFPA 70E B. Under appropriate conditions described in the preface of the table in NFPA 70E C. Using a table is not an acceptable method to determine PPE requirements.

7 29. Why is FR clothing rated in calories per square centimeter? A. Because it is an especially precise unit of measurement. B. It is the only accurate way to measure resistance to ignition. C. Because it is a standard designation. D. None of the above. 30. What happens if the FR rating of the PPE is less than the exposure? A. The worker s clothing will ignite. B. The worker s clothing will provide no protection. C. Injury may result. 31. Will FR clothing protect me from shock or electrocution? A. Sometimes B. Always C. No 32. When is a face shield satisfactory face protection? A. When it is rated for both impact and thermal protection and worn with voltage rated gloves. B. When it is rated for both impact and thermal protection. C. When it is rated for both impact and thermal protection and the side of the face shield is closed. D. When it is rated for both impact and thermal protection and worn with a balaclava.

8 33. Why is it important to wear spectacles under a face shield or flash hood? A. A face shield or flash hood will not protect your eyes from impact. B. A face shield or flash hood will not protect your eyes from thermal energy. C. You might remove your hood and forget to put your spectacles back on. D. Because face protection is designed for wear with spectacles, it will not fit properly without them. 34. What clothing must not be worn when exposure to arc flash exists? A. A coat B. Clothing made of cotton blends or flammable/meltable fabric C. Clothing with an arc rating that is the same as the estimated incident energy D. PPE assembled from several individual components 35. What is the danger associated with the thermal hazard? A. Unprotected, bare skin is not a problem B. Conductive apparel C. Flammable apparel is the most significant D. Underrated FR clothing 36. What is the best PPE practice for workers who may be exposed to arc flash? A. Workers should wear ordinary work clothing. B. Workers should wear arc rated FR clothing that is rated as category 0 protection. C. Workers should wear arc rated FR clothing that is rated as category 1 protection. D. Workers should wear arc rated FR clothing that is rated as category 2 protection.

9 37. When do I need to use temporary (safety) grounds? A. If there is any chance that the conductor could become reenergized B. If there is any chance lightening could strike C. When you are seeking to limit the voltage between adjacent points 38. Why must temporary (safety) grounds be approved? A. So that the worker knows whether it can handle the available fault current. B. To ensure that the safety ground is correctly installed and will function properly. C. To give a third party the chance to review the product. 39. What constitutes approval of temporary (safety) grounds? A. Manufacturer and third party testing B. Manufacturer testing only C. Third party testing only 40. What are approach boundaries? A. Imaginary three dimensional figures that surround an exposed energized electrical conductor B. Protective barriers that surround an exposed energized electrical conductor C. Lines you cannot cross without receiving significant electrical shock 41. Why are approach boundaries important? A. So the worker is unable to make contact with an exposed energized electrical conductor. B. They illustrate increasing exposure to an exposed energized electrical conductor. C. They illustrate decreasing exposure to an exposed energized electrical conductor. 42. What is the difference between shock boundaries and a flash protection boundary? A. Flash protection boundaries are voltage dependant; shock boundaries energy dependant. B. Shock boundaries are voltage dependant; flash protection boundaries energy dependant. C. Flash protection boundaries and shock boundaries are the same thing.

10 43. Is arc flash boundary a generally accepted term? A. Yes; it is another acceptable term for flash protection boundary. B. Yes; it is another acceptable term for shock boundary. C. No; it is confusing. 44. Are safety interlocks important for personal protection? A. Yes; they serve one very important purpose. B. Yes; they can serve multiple important functions. C. No; however, they are an extra precaution. D. No; they have potential to do more harm than good. 45. Is a ground fault circuit interrupter (GFCI) effective in preventing injuries? A. GFCIs are generally ineffective. B. GFCIs are marginally effective. C. GFCIs are very effective. D. GFCIs are 100% effective. 46. What is the role of overcurrent protection? A. To eliminate shock and electrocution hazard B. To significantly reduce shock and electrocution hazard C. To prevent current flow in an unintended circuit D. To remove the source of energy any time current exceeds the rating of the circuit

11 47. Can I substitute a different size fuse? A. This is never OK. B. Not OK if the replacement fuse is by a different manufacturer as others in circuit. C. OK if the current rating is smaller. D. Both B and C are correct. 48. Is electrical equipment tested in a failure mode? A. Yes, always B. No, electrical equipment is not typically tested for arcing fault conditions. 49. Why is routine opening and closing of circuits an issue? A. Because of the inductive characteristic of electrical current B. Because an arc always occurs when disconnecting a circuit C. Because the current flowing in a circuit cannot be instantaneously stopped 50. When are insulated tools required? A. When working on or near an exposed energized electrical conductor B. When the worker is not otherwise protected from shock and electrocution C. Insulated tools are recommended by the NFPA 70E but not required by OSHA. D. Insulated tools are generally not recommended. 51. How are insulated tools rated? A. They are not rated. B. They are rated by the manufacturer. C. They are assigned a voltage rating. E. B and C.

12 52. What is arc flash? A. The result of current flowing through air B. The result of a fault in an electrical circuit C. The result of a second fault in an ungrounded circuit 53. What hazards are associated with arc flash? A. Thermal and mechanical energy B. Mechanical and electrical energy C. Electrical, thermal, and mechanical energy D. Electrical and thermal energy 54. Can an arc flash hazard exist in a manhole? A. Yes; arc flash in a manhole is a common occurrence. B. Yes; on occasion, an arc flash in a manhole can occur. C. Yes; but only if OSHA standards are blatantly ignored. D. No; properties of a manhole disallow the occurrence of arc flash. 55. Are workers normally exposed to arc flash? A. Possibly, due to ventilation holes in the door or cover. B. Possibly, due to inadequate maintenance of equipment. C. Both A and B. D. Never.

13 56. What are the most important variables of an arcing fault? A. Environmental conditions, duration of the arc, and worker s protective equipment B. Capacity of circuit to maintain the arc, duration of the arc, and protective equipment C. The capacity of the circuit, the size of the arc, and the size of the worker D. Capacity of the circuit, duration of the arc, and distance between worker and arc 57. When is an arc fault most likely to occur? A. When something is moving. B. When you are not properly protected. C. When you are in a hurry. D. When you re in a manhole. 58. What is the most frequent cause of an arcing fault? A. Faulty equipment B. Environmental conditions C. Human error D. Unknown 59. What work practice is most important to avoid injury from an arc flash? A. Wear personal protective equipment. B. Use GFCIs and overcurrent conductors. C. Memorize applicable OSHA standards and state legislation. D. Create an electrically safe work condition.

14 60. How does a worker know if he or she is exposed to a potential arc flash? A. One reason arc flash is so dangerous is because you can t tell if you are exposed. B. It might be written on the equipment and you just have to check. C. If capacity of energy source exceeds 100 kva, you are exposed to a thermal hazard. D. None of the above. 61. What happens if the overcurrent protection fails to clear the fault? A. The device could fail violently, expelling parts and pieces. B. The risk of injury is elevated significantly. C. It probably means that the overcurrent device was applied improperly. 62. Why do I get different answers when I use different methods to calculate incident energy? A. There is no effective way to even estimate incident energy. B. It is easy to make a mistake calculating incident energy. C. No method of calculating incident energy is perfect; each has pros and cons. D. You should only use the one, OSHA approved method to calculate incident energy. 63. Am I exposed to an arc flash hazard when the equipment doors are closed? A. No, if all code requirements are met and there is no deterioration. B. No, even if there are ventilation holes in the doors. C. Yes, the doors do nothing to protect you. D. None of the above.

15 64. Will rubber products protect me from arc flash? A. Rubber products may offer some protection although it is not their intended use. B. Yes, rubber products are the best means of protection against arc flash. C. Rubber products will provide no protection in a thermal event. D. None of the above. 65. How do I evaluate an arc flash hazard in a dc circuit? A. Currently, there is no very good way. B. Apply the same method as you would for an ac circuit. C. Use one of three consensus methods. D. Use the only approved consensus method. 66. What is the difference between exposure to an ac circuit and a dc circuit? A. Arc flash is not associated with dc circuits. B. Electrocution is not associated with ac circuits. C. The intensity is likely to be different. D. There is no information available on the subject. 67. What does one lock/one person mean? A. It is a basic premise of lockout. B. Each person who may be exposed to a known hazard installs a lockout device on the source of hazardous energy. C. There is one lock per person.

16 68. Is it necessary to audit the lockout/tagout procedure? A. Yes, because if the lockout/tagout procedure is not audited, the workers will not use it. B. Yes, to determine whether the prescribed lockout/tagout procedure is effective. C. No, because there are better ways to confirm the effectiveness of a lockout/tagout procedure. D. No, because auditing is costly, invasive, and never recommended. 69. What does in control of energy mean? A. The worker is wearing adequately rated PPE. B. An electrically safe work environment exists. C. A disconnecting means is physically restrained from operating. D. An adequately rated overcurrent device is in place. 70. Is tagout as safe as lockout? A. Yes, tagout, in some case, is safer than lockout. B. Yes, tagout is always safer than lockout. C. No, lockout provides maximum safety. D. Yes, tagout is just as safe as lockout. 71. What is the best practice for lockout/tagout? A. Tags are very reliable. B. Worker s always observe tags and follow the instructions. C. Lockout is the best practice..

17 72. What is a person in charge? A. A person assigned responsibility to ensure that all sources of energy are controlled. B. The person who audits lockout/tagout. C. The person who buys the lockout devices. D. The person who commits the lockout/tagout procedure to writing. 73. What is a simple lockout? A. When a single crew is performing the work task. B. When equipment is supplied from a single source of energy. C. When a single disconnecting means is used What is individual employee control? A. A person assigned responsibility to ensure that all sources of energy are controlled B. When equipment is supplied from a single source of energy. C. Auditing of procedures such as lockout/tagout performed by the employer. D. When an employee has a task within the enclosure that contains the disconnecting means. 75. What is the difference between measuring voltage and testing for absence of voltage? A. A voltmeter can only be used to check the level of voltage. B. Testing for absence of voltage is a go/no go or yes/no test. C. There is no difference.

18 76. How do I test for absence of voltage? A. Test each phase conductor to every other phase conductor. B. Test each phase conductor to earth ground. C. Use a multi function meter. D. Both A and B are required 77. Why is the voltmeter important? A. Voltmeters are important because they are safety equipment. B. If a voltmeter fails in service, an arcing fault can be the result. C. Many injuries occur because of voltmeter failures 78. How do I choose a good voltmeter? A. Choose a voltmeter based on the intended use. B. Ensure that the voltmeter has a third party label and complies with consensus standards. C. Look for a Category Four static discharge rating. 79. What does anticipating failure mean? A. Noting an unusual noise or sound. B. An unusual smell frequently is a warning signal. C. Noting an elevated temperature is a warning that a failure is near. D. Anticipating failure is being aware of indications in A, B and C and reacting to them.

19 80. What is the difference between a barrier and a barricade? A. Only a barrier is a physical obstruction. B. Only a barrier is meant primarily to serve as a warning. C. Only a barrier is intended to prevent contact with a potentially energized conductor. D. Only a barricade is intended to isolate a potentially energized electrical conductor. 81. What is blind reaching? A. Reaching into a location without proper eyewear B. Reaching into a location that is dark or obstructed from vision C. Reaching into a location before inspecting it D. Reaching into a hazardous location without proper training 82. What is meant by the term degree of the hazard? A. The relative severity of an incident that has occurred B. The anticipated angle of an electrical arc C. The anticipated severity of an incident that may occur D. The relative risk associated with the type of hazard 83. What does duty cycle mean? A. Maximum on time and minimum off time for an electrical device B. The length of time it takes to complete a specific job task C. The length of time it takes electric current to flow through a circuit D. The expected lifespan of an electrical device

20 84. What are electrical safety program controls? A. Adequately rated PPE and overload controls B. Policies that control the actions of each employee. C. Shut offs or kill switches in case of emergency D. Proper use of barricades and warning signs 85. What is an electrically safe work condition? A. When all sources of electrical energy have been Disconnected. B. When all sources of electrical energy have been verified as being open. C. When all sources of electrical energy have been controlled by locks and tags. are necessary. 86. What is an energized work permit? A. It ensures that work near exposed energized conductors receive sufficient attention. B. It guarantees a safe condition. C. It ensures that supervisory personnel know about the increased risk of injury. D. Both A and C are correct. 87. Why is an energized work permit important? A. It ensures an electrically safe work condition. B. It ensures equipment is functioning properly. C. It educates managers, among others. D. It eliminates the chance that work could be delayed

21 88. What is a hold card? A. A penalty for misconduct by the employer B. A penalty for misconduct by the employee C. A tag indicating that equipment is damaged D. A device to warn that the disconnecting means must not be operated 89. What is incident energy? A. A worker s exposure to mechanical energy B. A worker s exposure to heat energy C. A worker s exposure to chemical energy D. A worker s exposure to electrical energy 90. What is a job briefing? A. A written report based on a competent person s inspection B. Required safety training prior to a specific work task C. A discussion of a work task before it is started D. A written work plan kept onsite 91. What is a live part? A. A part that is energized B. A part that is energized and exposed C. A part associated with the presence of hazard D. A, B and/or C could be true, based on the source of the definition.

22 92. What is a moveable conductor? A. A conductor for which the approach distance is not fixed B. A conductor that moves in the wind. C. A conductor that moves under any external force. 93. What is a procedure? A. The established practice at a given worksite. B. Written instructions that describe how to perform a work task. C. Regulations established by OSHA or a governing body. D. Any process that has been used previously. 94. What is a safe workplace? A. A work location where an injury cannot occur B. A workplace where there is no prior record of an incident resulting in bodily injury C. A work location that has been inspected and approved by OSHA D. A workplace that is free from recognized hazards 95. What is a work practice? A. Protecting your voltmeter in a case B. Keeping your voltmeter loose in your toolbox C. Using a ground fault circuit interrupter on each cord D. All of the actions listed above are examples of a work practice.