Electrical Safety- Related Level 1.
True or False A full understanding and recognition of existing and potential hazards is an essential part of ensuring that an environment is electrically safe.
True
True or False Electrical protective equipment provides limited protection against electrical hazards.
True
True or False All electrocutions are preventable
True 2Q11
True or False An arcing fault is current flowing through the air between conductors or between a conductor and a grounded part.
True 2Q13
The motor fault current contribution, if significant, may be determined and added to all fault locations throughout the system. A practical estimate of the motor fault current contribution can be made by multiplying the total motor load current by ? . A good general rule is to calculate the total motor load current, multiply by ? , and add the result to available short-circuit current calculated without motor contribution.
4 or 6 / 4 5Q13
Determine the available fault current at the secondary of a 300 kVA transformer having a 208/120 volt secondary and 2% impedance. Assume -10% tolerance for transformer impedance and motor contribution is negligible. Choose the answer that is closest to being correct.
46,281 A I_FLA_ = (300 * 1000) / (208 * 1,732) =833A Multiplier = 100 / (.9 * 2) = 55.56 I_SCA (L-L-L) = 833 * 55.56 =46,281 A 5Q14
True or False The longer an arcing fault lasts, the less the incident energy.
False 2Q32
True or False High arcing fault currents always result in high incident energies in all situations, irrespective of the type overcurrent protective devices used.
False 2Q34
True or False Given the available fault current at the source end of a conductor run, the available fault current at the end of a circuit conductor run is not affected by the conductor's size or length.
False 5Q11
True or False Various methods have been developed to calculate the available fault current, but only the point-to-point method is based on Ohm's Law.
False 5Q16
True or False Note 2 to 1910.333(b)(2) clarifies that lockout and tagging procedures that comply with paragraphs (c) through (f) of 1910.147 will also be deemed to comply with 1910.333 (b)(2).
False Note: There are two conditions that must be met so that 1910.147 will be in compliance with 1910.333(b)(2) as outlined in Note 2 to 1910.333(b)(2).
True or False Appendix A to OSHA 29 CFR 1910.147 serves as a mandatory guideline to assist employers and employees in complying with the requirements of 1910.147. 20
False3 4Q20 (blaze Q It)
Name recognized means which serve to protect from electrical shock?
GFCI Rubber insulating gloves 1Q10
1910.147 is found in Subpart J, ? Environmental Controls, and is entitled "The control of hazardous energy (lockout/tagout)."
General 4Q11
Extensive tests and analysis by industry members have shown that the energy released during an arcing fault is related primarily to two characteristics of the OCPD protecting the affected circuit: I. The amount of fault current the OCPD lets through II. The ampacity of the OCPD III. The time it takes the OCPD to open IV. The voltage rating of the OCPD
I & III. 2Q6
Article 120 is divided into sections that provide the requirements for establishing an electrically safe work condition. Which of the following are the titles to those sections?
I. Lockout/Tagout Equipment II. Lockout/Tagout Principles III. Lockout/Tagout Procedures IV. Lockout/Tagout Program V. Process for Establishing and Verifying an Electrically Safe Work Condition VI. Work Involving Electrical Hazards 4Q23
True or False Incident energy decrease as the distance from the arc source increases.
True 2Q35
True or False A victim who cannot "let go" of a current source is much more likely to be electrocuted than someone whose reaction removes him or her from the circuit more quickly.
True 2q22
True or False In accordance with 1910.333(b)(2), while any employee is exposed to contact with parts of fixed electric equipment or circuits which have been deenergized, the circuits energizing the parts shall be locked out or tagged or both in accordance with the requirements of this paragraph.
True 4Q15
True or False An electrically safe work condition is defined as a state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested to verify the absence of voltage, and, if necessary, temporarily grounded for personnel protection.
True 4Q21
True or False The process of establishing and verifying an electrically safe work condition includes following all of the eight steps presented, in the order they are presented, if feasible.
True 4Q22
True or False An arcing fault condition does not have a solid (bolted) connection between conductors or buses at the point of the fault. Instead, an arcing current path is through the air between conductive parts with an associated arc resistance.
True 5Q4
True or False The magnitude of fault current available at a specific location depends on two key factors: 1. The magnitude of fault current that the electrical energy source(s) can deliver 2. The impedance of transformers, conductors, and busways from the source(s) to the point of the fault
True 5Q6
True or False One of the eight steps to establish and verify an electrically safe work condition is to release stored electrical energy.
True False Note See NFPA 70E 120.5(4)
True or False One of the eight steps to establish and verify an electrically safe work condition is to release or block stored mechanical energy.
True Note : See NFPA 70E 120.5(5). 4Q25
The two standards applicable to the majority of the work performed by Electrical Workers are found in Part 1926 and in Part 1910. Part 1926 applies to ? , and Part 1910 applies to ? .
construction / general industry 3Q15
An electrical hazard is defined in NFPA 70E as a dangerous condition such that ? .
contact or equipment failure can result in electric shock, arc flash burn, thermal burn, or blast 1Q21
In accordance with 1910.333(b)(1), conductors and parts of electric equipment that have been deenergized but have not been locked out or tagged in accordance with 1910.333(b) shall be treated as ? parts, and 1910.333(c) applies to work on or near them.
energized 4Q14
A well-informed client understands the hazards of ? work and the financial implications associated with an electrical incident, and is ? to permit energized work.
energized / less likely 1Q6
Subpart C provides ? safety and health provisions for Part 1926, Safety and Health Regulations for Construction.
general 4Q10
During an arcing-fault event, what forms of energy are released
heat light pressure
Protective systems, such as work practices and PPE, can help to ? or ? exposure to hazards.
reduce / eliminate 1Q13
In accordance with 1926.417, equipment or circuits that are deenergized shall be ? and shall have ? at all points where such equipment or circuits can be energized.
rendered inoperative / tags attached 4Q8
For a low voltage distribution system, the available fault current is typically the highest at the ? .
service point 5Q9
The OSH Act comprises ? sections.
35 3Q10
2The Occupational Safety and Health Act of 1970 consists of ? sections. Section ? is entitled Congressional Findings and Purpose.
35 / 2 4Q2
U.S. employment nearly doubled between 1970 and 2010. According to OSHA, in 1970, about ? workers were killed on the job every day. For 2010, the Bureau of Labor Statistics reported about ? worker deaths per day.
38 / 12 3Q2
Section ? of the OSH Act requires each ? to comply with occupational safety and health standards and all rules, regulations, and orders issued pursuant to this Act, which are applicable to his or her own actions and conduct.
5(b) / employee 3Q14
What variables are associated with the intensity of the energy released in an arcing fault.
Arc-gap spacing Available short-circuit current Duration of the fault current.
Match the following subpart titles with their respective subpart letter in Part 1926. General Safety and Health Provisions= PErsonal Protective and Life Saving Equipement= Electrical= Fall Protection= Excavations= Electric Power Transmission and Disribution= Ladders=
General Safety and Health Provisions= (C) PErsonal Protective and Life Saving Equipement=(E) Electrical=(K) Fall Protection=(M) Excavations=(P) Electric Power Transmission and Disribution=(V) Ladders=(X) 3Q16
? is the amount of thermal energy impressed on a surface a certain distance from the source, generated during an electrical arc event.
Incident energy 2Q16
Match the following subpart titles with their respective subpart letter in Part 1910: Personal Protective Equipment General Environmental Controls Medical and First Aid Fire Protection Machinery and Machine Guarding Special Industries Electrical
Personal Protective Equipment = (I) General Environmental Controls = (J) Medical and First Aid= (K) Fire Protection = (L) Machinery and Machine Guarding (O) Special Industries = (R) Electrical = (S)
During an arcing-fault event, the temperature of the arc terminals can reach approximately ? , which is about four times as hot as the surface of the sun. The high arc temperature changes the state of conductors from solid to both hot molten metal and to metal vapor.
35,000 degrees F 2Q25
Employers must comply with the General Duty Clause of the OSH Act, which is generally cited when no specific OSHA standard applies to the hazard. It is found in Section ? of the OSH Act. Q
5 3Q13
Class A ground-fault circuit interrupters (GFCIs) trip when the current to ground is ? or higher.
6 mA 1Q9
What conditions affect contact resistance during shock incident?
Cuts Large contact area Perspiration-soaked clothing Wet hands or feet. 2Q7
True or False During an arcing-fault event, because of the expansive vaporization of conductive metal, a line-to-line or line-to-ground arcing fault can escalate into a 3-phase arcing fault in a thousandth of a second.
True 2Q27
During an ? event, copper conductive parts can vaporize, expanding to ? times the volume of solid copper; thus a copper conductive component the size of a penny could expand as it vaporizes and disperse to the size of a refrigerator.
arcing-fault / 67,000 2Q26
In accordance with 1926.95(b), where employees provide their own protective equipment, the ? shall be responsible to assure its adequacy, including proper maintenance and sanitation of such equipment.
employer 3Q20
Which is not a characteristic of contact with energized components that affects severity of injury to a person in a shock incident? Select one: a. Circuit voltage b. Contact resistance and internal resistance of the body c. Duration of the contact Incorrect d. Environmental conditions that affect the body's contact resistance e. Pathway of the current through the body f. The voltage loss of the conductor run does not exceed 5%
f. 2Q2
There are various means to mitigate arcing fault energy releases, but ? are the most commonly used.
overcurrent protective devices 2Q28
In accordance with 1910.132(d)(1), the employer is required to assess the workplace to determine if hazards are present or are likely to be present, which necessitate the use of personal protective equipment (PPE). What is/are additionally required of the employer if such hazards are present or likely to be present?
. Communicate selection decisions to each affected employee. II. Select, and have each affected employee use, the types of PPE that will protect the affected employee from the hazards identified in the hazard assessment. III. Select PPE that properly fits each affected employee. 3Q26
Using Ohm's Law, determine the current flow in the circuit thr• Internal body resistance = 100 ohms • Left-hand contact resistance = 350 ohms • Foot contact resistance with ground = 550 ohms • 480 volts
.48 A 2Q8
In an average person, ? to ? is the range of current of the let-go threshold that causes the muscles to lock up.
10 mA / 40 mA 2Q10
A quick conservative estimate for determining the available fault current at the secondary of a service transformer, assuming infinite available fault current on the transformer primary, is to use the following equation: I_SCA_ = (Trans FLA * 100) / (%Z) Determine the available fault current on the secondary of a 500 kVA, 3-phase, 480-volt (secondary) transformer with a 5% impedance. Use the 0.9 multiplier to the transformer impedance to account for 10% impedance tolerance. Do not include motor contribution. Then determine the available fault current for the same circumstances, but with a 2% impedance. Choose the closest answer.
13,356 A / 33,339 A 5Q10
Match the following section numbers with their respective section title in the OSH Act: Section 2 = Section 5 = Section 9 = Section 17 =
2 = congressional findings & purpose 5 = Duties (hehehehehe) 9 = Citations 17 = Penalties
Which of the following is not considered an electrical hazard? A fall whilst installing an electrical luminaire Arc Blast Arc Flash Electrical Shock
A fall...blah blah 2Q1
Too often a culture exists in the workplace where workers are routinely allowed and expected to work on or near energized electrical circuits. This could be due to which of the following?
Failure to realize how quickly a situation might change and cause an energy release. ignorance of laws lack of knowledge of the severity of the hazards.
True or False Control circuit devices, such as push buttons, selector switches, and interlocks, may be used as the sole means for deenergizing circuits or equipment.
False
True or False If workers wear arc-rated clothing and other protective equipment, they are assured of escaping electrical incidents unscathed.
False
True or False The PPE requirements of NFPA 70E Section 130.7 are intended to provide protection against physical trauma other than exposure to the thermal effects of arc flash. ``
False 1Q16
True or False Arc-rated suits and other arc-rated clothing used to protect Electrical Workers from arc-flash hazards are also rated to protect workers from arc-blast hazards.
False 2Q12
True or false Arcing faults typically produce predictable, smooth oscillograph current curves; that is, smooth sine waves, some being asymmetrical and some symmetrical. However, bolted faults tend to be dynamic with variability in the flow of current, resulting in erratic, unpredictable current flow.
False 5Q5
True or False The available fault current can be determined or estimated just by considering the ampere rating of an electrical panel. For instance, all 800-ampere distribution panelboards in a facility will have the same available fault current of 15,000 amperes at their line terminals.
False 5q8
true or False Working on energized circuits is part of the job and should be considered a routine part of the electrical work that an Electrical Worker performs.
False Note: Energized work is permitted only under limited circumstances as set forth by OSHA and NFPA 70E.
? current is a current that flows outside the normal conducting path.
Fault 5Q3
In accordance with 1910.333(b)(2)(iii), a lock and a tag is generally required to be placed on each disconnecting means used to deenergize circuits and equipment on which work is to be performed. What else is true?
I. A lock and a tag are required except as provided in paragraphs (b)(2)(iii)(C) and (b)(2)(iii)(E) of this section. II. Each tag shall contain a statement prohibiting unauthorized operation of the disconnecting means and removal of the tag. III. The lock shall be attached so as to prevent persons from operating the disconnecting means unless they resort to undue force or the use of tools. 4Q17
The following requirements shall be met, in the order given, before circuits or equipment are reenergized, even temporarily.
I. A qualified person shall conduct tests and visual inspections, as necessary, to verify that all tools, electrical jumpers, shorts, grounds, and other such devices have been removed, so that the circuits and equipment can be safely energized. II. Each lock and tag shall be removed by the employee who applied it or under his or her direct supervision. III. Employees exposed to the hazards associated with reenergizing the circuit or equipment shall be warned to stay clear of circuits and equipment. IV. There shall be a visual determination that all employees are clear of the circuits and equipment. 4Q19
In accordance with 1910.333(b)(2)(iv), which of the following shall be met before any circuits or equipment can be considered and worked as deenergized?
I. A qualified person shall operate the equipment operating controls or otherwise verify that the equipment cannot be restarted. II. A qualified person shall use test equipment to test the circuit elements and electrical parts of equipment to which employees will be exposed and shall verify that the circuit elements and equipment parts are deenergized. III. If the circuit to be tested is over 600 volts, nominal, the test equipment shall be checked for proper operation immediately after the test to verify that the circuit elements and equipment parts are deenergized. IV. The test to verify that the circuit elements and equipment parts are deenergized must determine if any energized condition exists as a result of inadvertently induced voltage or unrelated voltage backfeed even though specific parts of the circuit have been deenergized and presumed to be safe. 4Q18
The Occupational Safety and Health Act of 1970 was enacted to assure safe and healthful working conditions for working men and women by ...?
I. Assisting and encouraging the states in their efforts to ensure safe and healthful working conditions II. Authorizing enforcement of the standards developed under the Act III. Providing for research, information, education, and training in the field of occupational safety and health 4Q1
The employer is required to maintain a written copy of the lockout and tagging procedures outlined in paragraph 1910.333(b)(2) and shall make it available for inspection by ...?
I. Authorized representatives of the Assistant Secretary of Labor II. Employees III. The Assistant Secretary of Labor 4Q13
What are likely outcomes when energized work is performed when it is not justified?
I. Contractors and their clients are exposed to undue risks of increased insurance premiums and loss of production. IV. Workers expose themselves to potential injury or death.
Section 5, Duties, identifies responsibilities for both employers and employees in the OSH Act. What statements are true in accordance with Section 5, Duties?
I. Each employee shall comply with occupational safety and health standards and all rules, regulations, and orders issued pursuant to this Act which are applicable to his or her own actions and conduct. II. Each employer shall furnish to each of his or her employees employment and a place of employment that are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his or her employees. IV. Each employer shall comply with occupational safety and health standards promulgated under this Act. 4Q5
OSHA's safety and health standards have prevented countless work-related injuries, illnesses, and deaths. What happens despite all this
I. Each year more than 3.3 million working men and women suffer a serious job-related injury or illness. II. Far too many preventable injuries and fatalities continue to occur. III. Millions more are exposed to toxic chemicals that may cause illnesses years from now. IV. Significant hazards and unsafe conditions still exist in U.S. workplaces. 1Q4
Under the OSH law, employers are responsible for providing a safe and healthful workplace for their workers. What other OSHA application statements are also true?
I. OSHA covers most private-sector employers and workers in all 50 states, the District of Columbia, and other U.S. jurisdictions. II. The OSH Act covers most private-sector employers and their workers, in addition to some public-sector employers and workers in the 50 states and certain territories and jurisdictions under federal authority. III. State plans are OSHA-approved job safety and health programs operated by individual states instead of federal OSHA. 3Q6
The point-to-point method has equations to calculate the available fault current ? .
I. at the end of a run of conductor or busway II. at the secondary of a transformer, assuming infinite primary available fault current (this is a conservative calculation) III. at the secondary of a transformer with primary available fault current known 5Q12
In accordance with 1910.335(a)(2)(ii), which of the following are among what is specified to be used to protect each employee from shock, burns, or other electrically related injuries while that employee is working near exposed energized parts, what might be accidentally contacted or where dangerous electric heating or arcing might occur?
II. Insulating materials III. Protective barriers IV. Protective shields 3Q38
In accordance with 1910.333(a)(2), if the exposed live parts are not deenergized, ? safety-related work practices shall be used to protect employees who may be exposed to the electrical hazards involved.
Other Note: Other safety-related work practices are those other than the rule requiring that exposed live parts be deenergized except for reasons of increased or additional hazards or infeasibility. 3Q35
Which of the following is the best way to prevent injury from electrical hazards to the worker?
Put the equipment in an electrically safe work condition Correct 1q14
In accordance with ? , the employer shall instruct each employee in the recognition and avoidance of unsafe conditions and the regulations applicable to his or her work environment to control or eliminate any hazards or other exposure to illness or injury. 6
Subpart C of Part 1926 4Q7
True or False Equipment or circuits that are not deenergized as part of a scheduled shutdown ultimately could end up unintentionally being shut down for an extended period of time. This could be due to an unplanned event, such as a dropped tool or a loose part falling into energized equipment, creating an unscheduled shutdown.
True
True or False In accordance with 1926.20(f)(2), standards in Part 1926 requiring training on hazards and related matters, such as standards requiring that employees receive training or that the employer train employees, provide training to employees, or institute or implement a training program, impose a separate compliance duty with respect to each employee covered by the requirement. The employer must train each affected employee in the manner required by the standard, and each failure to train an employee may be considered a separate violation.
True
In general, the fault current ? as the distance from an electrical source ? due to the increased impedance added by circuit components, such as conductors.
decrease / increases 5Q7
Statistics show the rate of reported serious workplace injuries and illnesses ? , from 11 per 100 workers in 1972 to ? per 100 workers in 2010.
dropped / 3.5 3Q3
In accordance with 1910.137(c)(2)(ii), insulating equipment is required to be inspected for damage before ? and immediately following any incident that can reasonably be suspected of having caused damage. Insulating gloves shall be given an ? test, along with the inspection.
each day's use / air 3Q29
A utility replaces an existing 300-kVA transformer with a transformer having either a higher kVA or lower impedance. The available fault current on the secondary of the new transformer will be ? the available fault current of the transformer being replaced.
higher than 5Q15
In accordance with 1910.335(a)(2)(i), when working near exposed energized conductors or circuit parts, each employee shall use ? tools or handling equipment if the tools or handling equipment might make contact with such conductors or parts.
insulated 3Q37
The threshold at which electrical current causes muscles to lock up, resulting in the inability of a person to release his or her grip from the source of current is called the ? threshold.
let go 2Q9
In accordance with 1910.333(a), safety-related work practices shall be employed to prevent electric shock ? resulting from either direct or indirect electrical contacts, when work is performed near or on equipment or circuits that are or may be energized. The specific safety-related work practices shall be consistent with the ? of the associated electrical hazards.
or other injuries / natrue and extent 3Q33
? current is an excessive current relative to normal operating current, and one that is confined to the normal conductive path provided by the conductors, circuit components, and loads of the distribution system.
overload 5Q2
An overcurrent is either a(n) ? current or a ? current.
overload / fault 5Q1
In accordance with 1926.21(b)(2), the employer is required to instruct each employee in the ? of unsafe conditions and the ? applicable to his or her work environment to control or eliminate any hazards or other exposure to illness or injury.
recogntion and avoidance / regulations 3Q18
Current-limiting overcurrent protective devices have the ability to ? damage and the arc-fault energy released (provided that the fault current is within the current-limiting range of the OCPD).
reduce 2Q31`
As part of its findings in the Congressional Findings and Purpose section of the OSH Act, the Congress found that personal injuries and illnesses arising out of work situations impose a(n) ? upon, and are a(n) ? , interstate commerce in terms of lost production, wage loss, medical expenses, and disability compensation payments.
substantial burden / hindrance to 4Q3
Congress created OSHA to assure ? and ? conditions for working men and women by setting and enforcing standards and providing training, outreach, education, and compliance assistance.
Safe / healthful 3Q1`
Name the electrical hazard that the following phenomenon represents. Electrical current flows through the body, causing muscles to lock up and resulting in the inability of a person to release his or her grip from the current.
Shock hazard 2Q3
True or False Voltage testing is considered energized work.
True Note: While voltage testing is among the tasks that are generally considered infeasible to perform deenergized, appropriate PPE is required to be worn to perform this energized work. 1Q18
In accordance with 1910.333(b)(2), while any employee is exposed to contact with parts of fixed electric equipment or circuits that have been deenergized, the circuits energizing the parts shall be ? in accordance with the requirements of this paragraph.
locked out or tagged or both 3Q31
The publication All About OSHA discusses standards that may be applicable in the workplace. These include the ? , ? , Maritime, and Agriculture standards.
Construction / General Industry 3Q12
True or False During a high-intensity arc-fault event, tremendous energy can be released in a few hundredths of a second. Humans can detect, comprehend, and react to events within these time frames to minimize injuries. `
False 2Q20
True or False During an arcing fault event, the thermal energy released is not directly proportional to the time it takes to interrupt the fault current.
False 2Q21
True or False The worst arc-blast hazards typically result from arcing faults that release low energy in a long-time duration.
False 2Q29
True or False3 In accordance with 1910.132(a), protective equipment, including personal protective equipment for eyes, face, head, and extremities; protective clothing; and protective shields and barriers, shall be provided, used, and maintained in a sanitary and reliable condition wherever it is necessary by reason of hazards of processes or environment, chemical hazards, radiological hazards, or mechanical irritants encountered in a manner capable of causing injury or impairment in the function of any part of the body through absorption, inhalation, or physical contact.
True 3Q25
True or False In accordance with 1910.335(a)(1)(i), employees working in areas where there are potential electrical hazards shall be provided with, and shall use, electrical protective equipment that is appropriate for the specific parts of the body to be protected and for the work to be performed.
True 3Q36
True or False By passing the Occupational Safety and Health Act of 1970, Congress authorized enforcement of the standards developed under the Act.
True 3Q9
Incident energy ? as distance from the arc source increases.
decreases 2Q18
The ? a worker is from an arcing fault source of a specific energy release magnitude,the less thermal energy will be impressed on the worker.
farther 2q33
In accordance with 1926.417(b), equipment or circuits that are deenergized shall be ? and shall have tags attached at all points where such equipment or circuits can be energized.
rendered inoperative 3Q22
Cuts, abrasions, or blisters on hands can negate skin ? , leaving only internal body resistance to oppose current flow.
resistance 2Q4
True or False In accordance with Note 2 to 1910.333(b)(2), the lockout and tagging procedures that comply with paragraphs (c) through (f) of 1910.147 will also be deemed to comply with 1910.333(b)(2).
False Note: Note 2 states: "Lockout and tagging procedures that comply with paragraphs (c) through (f) of 1910.147 will also be deemed to comply with paragraph (b)(2) of this section provided that: 1. The procedures address the electrical safety hazards covered by this Subpart; and 2. The procedures also incorporate the requirements of paragraphs (b)(2)(iii)(D) and (b)(2)(iv)(B) of this section."
True or False There are widely accepted and used arc-blast hazard risk assessment methods and ways to protect workers from arc-blast hazards.
False 2Q17
In accordance with 1910.137(c)(2), what is required of electrical protective equipment?
I. Electrical protective equipment shall be subjected to periodic electrical tests. II. Protector gloves are generally required to be worn over insulating gloves. III. Rubber insulating gloves are generally required to be electrically tested every 6 months. Note: There are exceptions to when protector gloves must be worn over insulating gloves. Note also Footnote (1) to Table I-5: "If the insulating equipment has been electrically tested but not issued for service, it may not be placed into service unless it has been electrically tested within the previous 12 months." 3Q30
OSHA requires that employers be responsible for providing a safe workplace, including a workplace that does not have serious hazards. What other statements are also true?
I. Employers must find and correct safety and health problems. II. Employers must follow all OSHA safety and health standards. IV. Examples of effective ways to eliminate or reduce risks are switching to safer chemicals, enclosing processes to trap harmful fumes, and using ventilation systems to clean the air.
Many factors should be considered in decisions to create a safe work environment. List considerations that should be included in the development and implementation of a safety program, training, and risk assessment procedure?
I. Has an attempt been made to reduce the potential worker exposure through work practice or design considerations, such as arc-resistant switchgear or remote switching? II. Has the impedance on the transformer on the supply side of the service changed? III. Has the overcurrent protective device (OCPD) been maintained properly? IV. Was the overcurrent protection selected solely to protect the equipment or was worker protection considered as well? 1Q19
In accordance with 1910.132(f)(1), the employer is required to provide training to each employee who is required by this section to use PPE. Each such employee shall be trained to know at least ...?
I. How to properly don, doff, adjust, and wear PPE II. The limitations of the PPE III. The proper care and maintenance of the PPE IV. When and what PPE is necessary
What does OSHA identify as negative job-related injury or illness consequences for America's economy in addition to the direct impact on individual workers?
I. Indirect costs to employers, including lost productivity, employee training, and replacement costs, as well as time for investigations following injuries, which can more than double these costs II. Occupational injuries and illnesses, which cost American employers over $1 billion a week in workers' compensation costs III. Workers and their families' emotional and psychological costs, in addition to the loss of wages and the costs of caring for the injured, which further weakens the economy Select one: 3Q5
In accordance with 1910.132(d)(2), the employer is required to verify that the required workplace hazard assessment has been performed through a written certification that identifies what?
I. The date(s) of the hazard assessment II. The document as a certification of hazard assessment III. The person certifying that the evaluation has been performed IV. The workplace evaluated 3Q27
The true cost of an electrical injury or fatality should be considered before deciding that work must be performed on energized equipment. List considerations determine the true cost of an electrical injury or fatality?
I. Which ultimately costs more: an unscheduled shutdown or a planned shutdown? II. Can the equipment be shut down at night, over the weekend, or at some other point in time? III. Have the costs associated with human life, equipment, loss of production, insurance premium increases, potential exclusion from bid lists, corporate image, and worker morale been considered in the decision-making process? IV. What is the true cost if something goes wrong? 1Q20
An electrically safe work condition is defined as a state in which an electric conductor or circuit part has been ? .
I. disconnected from energized parts II. temporarily grounded for personnel protection, if necessary III. locked/tagged in accordance with established standards IV. tested to the absence of voltage 1Q7
In accordance with 1910.333(a)(1), live parts to which an employee may be exposed shall be deenergized before the employee works on or near them, unless what conditions are in effect?
II. Live parts that operate at less than 50 volts to ground need not be deenergized if there will be no increased exposure to electrical burns or to explosion due to electric arcs. III. The employer can demonstrate that deenergizing introduces additional or increased hazards. 3Q34
OSHA inspections are initiated without advance notice, conducted using on-site or telephone and facsimile investigations, performed by compliance officers, and scheduled based on order of priority.What is OSHA's inspection order by priority?
Imminent danger Catastrophes Worker complaints and referrals Targeted Follow-up 3Q7
True or False In accordance with 1926.95(a), protective clothing and protective shields and barriers must be provided, used, and maintained in a sanitary and reliable condition wherever it is necessary by reason of hazards of processes or environment, chemical hazards, radiological hazards, or mechanical irritants encountered in a manner capable of causing injury or impairment in the function of any part of the body through absorption, inhalation, or physical contact.
True
True or false It is less likely that workers, contractors, and facility owners would allow energized work if everyone involved in the decision-making process fully understood the laws, requirements, hazards, true costs, and consequences associated with energized work.
True
True or False The time an arcing fault is permitted to flow is typically determined by the speed of the overcurrent protective device.
True 2Q19
True or False Burns are the most prevalent consequence of electrical incidents. These injuries can be due to either electrical contact (shock hazard) or arc-flash.
True 2Q30
True or False The faster an arcing fault is cleared by the overcurrent protective device, the lower the amount of energy released.
True 2Q5
True or False In accordance with 1926.20(f)(1), the employer must provide PPE to each employee required to use the PPE, and each failure to provide PPE to an employee may be considered a separate violation.
True 3Q17
True or False In accordance with 1926.416(a)(1), no employer shall permit an employee to work in such proximity to any part of an electric power circuit that the employee could contact the electric power circuit in the course of work, unless the employee is protected against electric shock by deenergizing the circuit and grounding it or by guarding it effectively by insulation or other means.
True 3Q21
True or False In accordance with 1910.6(a)(1), the standards of agencies of the U.S. Government, and organizations that are not agencies of the U.S. Government, which are incorporated by reference in Part 1910, have the same force and effect as other standards in this part.
True 3Q24
True or False As part of its findings in the Congressional Findings and Purpose section of the OSH Act, the Congress declares it to be its purpose and policy, through the exercise of its powers to regulate commerce among the several states and with foreign nations and to provide for the general welfare, to assure so far as possible every working man and woman in the nation safe and healthful working conditions and to preserve our human resources.
True 4Q4
An arc-flash hazard is defined in NFPA 70E as a source of possible injury or damage to health associated with the release of energy caused by a(n) ? .
electric arc 1Q12
The extent of injury resulting from ? is typically not immediately visible because the current flows through muscle tissue and organs and not through the skin, except at the entrance and exit points.
electrical shock. 2Q24
Live parts to which an employee might be exposed must be deenergized before the employee works on or near them, unless the ? can demonstrate that deenergizing introduces additional or increased hazards or is infeasible due to equipment design or operational limitations.
employer 1Q17
Ignition of ? worn by a worker is a cause of some of the most severe burns. Molten metal splatter or thermal energy emitted from an arcing fault ignites ? , and before it can be removed, severe burns result.
flammable clothing / flammable clothing 2Q23