Pat Testing Online Practice - Free (2014.1)

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Pat Testing Online Practice - Free (2014.1) - Quiz

A selection of questions taken from the best-selling Electacourse PAT Testing Exam Simulator. Purchased either on its own or as part of the popular Electacourse PAT Testing Revision Course, the PAT Testing Exam Simulator has been used by hundreds of UK electricians to help them gain the Portable Appliance Testing qualification


Questions and Answers
  • 1. 

    Information on the Electricity at Work Regulations can be found in the HSE publication

    • A.

      Guidance Note 3

    • B.

      On-Site Guide

    • C.

      The Memorandum of Guidance on the Electricity at Work Regulations 1989

    • D.

      The Code of Practice for In-service Inspection and Testing of Electrical Equipment

    Correct Answer
    A. Guidance Note 3
    Explanation
    The correct answer is Guidance Note 3. This is because the question asks for information on the Electricity at Work Regulations, and Guidance Note 3 is one of the publications listed that provides this information.

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  • 2. 

    Users of electrical equipment have responsibilities, which include ensuring the equipment they use has no obvious visual damage or defects. If a user becomes aware that the equipment they are using is defective, they should

    • A.

      Remove the equipment from service and report the defect

    • B.

      Remove the plug from the equipment to ensure that it cannot be used

    • C.

      Inform all potential users of the defect

    • D.

      Label the equipment as ‘Potentially Dangerous’

    Correct Answer
    A. Remove the equipment from service and report the defect
    Explanation
    The correct answer is to remove the equipment from service and report the defect. This is because if a user becomes aware that the equipment they are using is defective, it is important for them to remove it from service to prevent any potential harm or accidents. Additionally, reporting the defect is crucial as it allows the appropriate authorities or maintenance personnel to address the issue and take necessary actions to ensure the safety of other users.

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  • 3. 

    Records of test results and maintenance carried out on electrical equipment should be kept

    • A.

      For 12 months

    • B.

      For 2 years

    • C.

      There is no legal requirement to keep records

    • D.

      Until the equipment changes ownership

    Correct Answer
    A. For 12 months
    Explanation
    Records of test results and maintenance carried out on electrical equipment should be kept for 12 months. This is because it is important to have a record of the tests and maintenance performed on electrical equipment for a certain period of time in order to ensure compliance with safety regulations and standards. Keeping these records for 12 months allows for easy reference and verification of the equipment's performance and maintenance history. It also provides a reasonable timeframe for any necessary follow-up actions or investigations.

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  • 4. 

    It is necessary to keep records of maintenance and test results in order to

    • A.

      Guarantee safety

    • B.

      Placate the customer

    • C.

      Absolve liability on the inspector

    • D.

      Demonstrate that an effective maintenance system is in place

    Correct Answer
    A. Guarantee safety
    Explanation
    Keeping records of maintenance and test results is necessary to guarantee safety. By maintaining detailed records, organizations can track and monitor the maintenance activities and test results to ensure that all necessary procedures have been followed and that equipment or systems are in proper working condition. These records serve as evidence of compliance with safety regulations and standards, helping to identify any potential issues or risks and allowing for timely corrective actions. Ultimately, the goal is to provide a safe environment for individuals and prevent accidents or incidents that could harm people or property.

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  • 5. 

    Identify the missing word(s) from Regulation 4(2) of the Electricity at Work Regulations - ‘As may be necessary to prevent danger, all systems shall be ____________ so as to prevent, so far as is reasonably practicable, such danger’

    • A.

      Inspected

    • B.

      Maintained

    • C.

      Tested

    • D.

      Inspected and tested

    Correct Answer
    A. Inspected
    Explanation
    Regulation 4(2) of the Electricity at Work Regulations states that all systems should be inspected in order to prevent danger. This means that regular inspections should be carried out to identify any potential hazards or issues that could lead to danger. By inspecting the systems, any necessary maintenance or repairs can be identified and carried out to ensure the safety of individuals working with or around electricity. Inspections are crucial to prevent danger and ensure that the systems are in proper working condition.

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  • 6. 

    The Code of Practice for In-service Inspection and Testing of Electrical Equipment 4e does not deal with

    • A.

      Legislation releating to the supply of second hand equipment

    • B.

      Adequate record keeping

    • C.

      Equipment supplied at voltages of 1000 V a.c.

    • D.

      Microwave leakage

    Correct Answer
    A. Legislation releating to the supply of second hand equipment
    Explanation
    The Code of Practice for In-service Inspection and Testing of Electrical Equipment 4e does not deal with legislation relating to the supply of second-hand equipment. This means that the code does not provide guidelines or regulations specifically for the inspection and testing of electrical equipment that is being sold or supplied as second-hand. The code may cover other aspects such as adequate record keeping, equipment supplied at voltages of 1000 V a.c., and microwave leakage, but it does not address the legislation related to second-hand equipment specifically.

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  • 7. 

    The Code of Practice recognises a 'person with technical knowledge or sufficient experience to enable him/her to avoid the dangers that electricity may create' as a

    • A.

      Competent person

    • B.

      Experienced person

    • C.

      Trained person

    • D.

      Skilled person

    Correct Answer
    A. Competent person
    Explanation
    The Code of Practice defines a competent person as someone who possesses technical knowledge or sufficient experience to effectively mitigate the risks associated with electricity. This individual is capable of identifying and avoiding potential hazards, ensuring the safety of themselves and others. The term "competent person" implies a high level of expertise and understanding in electrical matters, making them qualified to carry out tasks related to electrical installations and maintenance.

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  • 8. 

    The Code of Practice recognises a person who is neither a skilled person nor an instructed person as

    • A.

      An in-competent person

    • B.

      An ordinary person

    • C.

      A general worker

    • D.

      An un-skilled person

    Correct Answer
    A. An in-competent person
    Explanation
    The Code of Practice recognizes a person who is neither a skilled person nor an instructed person as an in-competent person. This means that the person lacks the necessary skills or knowledge to perform a specific task or job. They may not have received proper training or have the experience required to carry out their responsibilities effectively. Therefore, they are considered in-competent in relation to the specific task or job in question.

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  • 9. 

    The Health and Safety at Work Act 1974 puts a duty of care on

    • A.

      The employer

    • B.

      The employee

    • C.

      The supervisor

    • D.

      Both employer and employee

    Correct Answer
    A. The employer
    Explanation
    The correct answer is the employer. The Health and Safety at Work Act 1974 is a legislation that places a responsibility on employers to ensure the health, safety, and welfare of their employees and others who may be affected by their work activities. This duty of care includes providing a safe working environment, conducting risk assessments, implementing safety measures, and providing necessary training and information to employees.

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  • 10. 

    Regulation 4(1) of The Provision and Use of Work Equipment Regulations 1998 states that every employer shall ensure that work equipment is so constructed or adapted as to be

    • A.

      Safe to use under all circumstances

    • B.

      Suitable for use by an ordinary person

    • C.

      Suitable for the purpose for which it is used or provided

    • D.

      Safe in skilled hands

    Correct Answer
    A. Safe to use under all circumstances
    Explanation
    The correct answer is "safe to use under all circumstances." This means that according to Regulation 4(1) of The Provision and Use of Work Equipment Regulations 1998, it is the responsibility of every employer to ensure that work equipment is constructed or adapted in a way that it can be used safely in any situation. This includes providing necessary safety features and precautions to prevent accidents or injuries. The employer must consider all possible circumstances and ensure that the equipment is designed and maintained to be safe in all of them.

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  • 11. 

    Regulation 12 of the Electricity at Work Regulations 1989 deals with

    • A.

      Persons to be competent to prevent danger and injury

    • B.

      Strength and capability of electrical equipment

    • C.

      Means of cutting off the supply and for isolation

    • D.

      Working space, access and lighting

    Correct Answer
    A. Persons to be competent to prevent danger and injury
    Explanation
    Regulation 12 of the Electricity at Work Regulations 1989 deals with persons to be competent to prevent danger and injury. This means that the regulation outlines the requirements for individuals working with electrical equipment to have the necessary knowledge, skills, and training to ensure the safety of themselves and others. It emphasizes the importance of competency in preventing potential dangers and injuries that may arise from working with electricity.

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  • 12. 

    When considering in service inspection and testing, certain regulations in the Electricity at Work Regulations are particularly important. One of these is Regulation 10, which concerns

    • A.

      Work on or near live conductors

    • B.

      Connections

    • C.

      persons to be competent to prevent danger and injury

    • D.

      Strength and capability of electrical equipment

    Correct Answer
    A. Work on or near live conductors
    Explanation
    Regulation 10 of the Electricity at Work Regulations is particularly important when considering in-service inspection and testing because it pertains to work on or near live conductors. This regulation emphasizes the need for individuals to be competent in order to prevent danger and injury while working on or near live conductors. It sets standards for ensuring the safety of personnel and highlights the importance of proper training and competence in handling live electrical equipment. This regulation aims to minimize the risks associated with working on or near live conductors and promote a safe working environment.

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  • 13. 

    Certain regulations in the Electricity at Work Regulations are particularly important to the issues surrounding in-service inspection and testing. One of these is Regulation 14 which concerns

    • A.

      Work on or near live conductors

    • B.

      Systems, work activities and protective equipment

    • C.

      Precautions for work on equipment made dead

    • D.

      Means of cutting off the supply and for isolation

    Correct Answer
    A. Work on or near live conductors
    Explanation
    Regulation 14 in the Electricity at Work Regulations is specifically related to work on or near live conductors. This regulation outlines the necessary precautions and safety measures that need to be taken when working with live electrical conductors. It emphasizes the importance of understanding the risks and implementing protective equipment to ensure the safety of individuals involved in such work. By adhering to Regulation 14, organizations can ensure that proper measures are in place to prevent accidents and injuries when working with live conductors.

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  • 14. 

    The Workplace (Health, safety and Welfare) Regulations 1992 require that workplace equipment, devices and systems are

    • A.

      Unavailable to ordinary persons

    • B.

      Only available to skilled personnel

    • C.

      Maintained

    • D.

      Clearly labelled as to their purpose

    Correct Answer
    A. Unavailable to ordinary persons
    Explanation
    The correct answer is "unavailable to ordinary persons." This means that according to the Workplace (Health, Safety and Welfare) Regulations 1992, workplace equipment, devices, and systems should not be accessible or usable by regular individuals who are not trained or authorized to handle them. This ensures that only skilled personnel who have the necessary knowledge and expertise can operate and handle such equipment, reducing the risk of accidents or misuse.

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  • 15. 

    The Electricity at Work Regulations requires that persons are competent to perform their duties. The regulation that requires this is

    • A.

      Regulation 10

    • B.

      Regulation 12

    • C.

      Regulation 16

    • D.

      Regulation 4

    Correct Answer
    A. Regulation 10
    Explanation
    Regulation 10 of the Electricity at Work Regulations states that persons who are carrying out electrical work must be competent to do so. This means that they must have the necessary knowledge, skills, and experience to safely perform their duties. This regulation is in place to ensure that electrical work is carried out by individuals who are qualified and capable of doing so, reducing the risk of accidents and ensuring the safety of both the workers and the public.

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  • 16. 

    Many faults can be determined by a visual inspection. This vital safety precaution is usually carried out by the person most familiar with the equipment and is known as

    • A.

      A formal visual inspection

    • B.

      A user check

    • C.

      An administrator check

    • D.

      A brief check

    Correct Answer
    A. A formal visual inspection
    Explanation
    A visual inspection is an important safety measure that can help identify various faults. It is typically conducted by the person who is most familiar with the equipment being inspected. This inspection is known as a formal visual inspection, as it follows a structured and systematic approach to thoroughly examine the equipment for any visible issues or defects. This ensures that potential hazards or malfunctions are identified and addressed before they can cause any harm or disruption.

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  • 17. 

    The Electricity at Work Regulations apply to

    • A.

      All electrical equipment

    • B.

      Electrical equipment in the workplace only

    • C.

      Electrical equipment supplied at voltages of less than 1000 V a.c. only

    • D.

      Portable electrical appliances only

    Correct Answer
    A. All electrical equipment
    Explanation
    The Electricity at Work Regulations apply to all electrical equipment, not just specific types or voltages. This means that the regulations cover all electrical equipment in any setting, including workplaces, regardless of the voltage level or whether it is portable or not. The regulations aim to ensure the safety of individuals working with or near electrical equipment by providing guidelines and requirements for its installation, maintenance, and use.

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  • 18. 

    Before being put into service for the first time, newly installed work equipment should be

    • A.

      Maintained

    • B.

      Run-in

    • C.

      Inspected

    • D.

      Used only by the most experienced user

    Correct Answer
    A. Maintained
    Explanation
    Newly installed work equipment should be maintained before being put into service for the first time. This is important because maintenance ensures that the equipment is in proper working condition and any potential issues or defects are identified and resolved. Regular maintenance helps to prevent breakdowns, prolong the lifespan of the equipment, and ensure the safety of the users. By conducting maintenance before using the equipment, any potential risks or hazards can be minimized, ensuring smooth and safe operations.

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  • 19. 

    The Provision and Use of Work Equipment 1998 (PUWER) applies only to

    • A.

      Self-employed workers

    • B.

      Work equipment used by workers at work

    • C.

      Portable equipment

    • D.

      Portable and transportable equipment

    Correct Answer
    A. Self-employed workers
    Explanation
    The correct answer is self-employed workers. The Provision and Use of Work Equipment 1998 (PUWER) is a regulation that applies to all work equipment used by workers at work, including self-employed workers. This regulation ensures that work equipment is suitable for its intended use, maintained in good working order, and used by competent individuals. It also requires employers and self-employed workers to provide adequate training and information on the safe use of work equipment. Therefore, PUWER applies specifically to self-employed workers, along with other categories mentioned in the question.

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  • 20. 

    Regulation 9 of PUWER requires employers to ensure that all persons who use work equipment have received adequate training for purposes of

    • A.

      Health and safety

    • B.

      Electrical safety

    • C.

      An efficient workplace

    • D.

      Legal compliance

    Correct Answer
    A. Health and safety
    Explanation
    Regulation 9 of PUWER requires employers to ensure that all persons who use work equipment have received adequate training for purposes of health and safety. This means that employers have a legal obligation to provide training to their employees to ensure their health and safety while using work equipment. This training is necessary to minimize the risk of accidents, injuries, and health hazards that may arise from the use of work equipment. It also helps employees understand and comply with the relevant health and safety regulations and guidelines.

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  • 21. 

    Regulation 6 of the Electricity at Work Regulations concerns adverse or hazardous environments. Where equipment may be exposed to the effects of wet or dusty conditions, particular attention should be paid to the

    • A.

      Equipment vibration levels

    • B.

      User's PPE

    • C.

      Equipment earthing

    • D.

      IP rating

    Correct Answer
    A. Equipment vibration levels
    Explanation
    Regulation 6 of the Electricity at Work Regulations states that in adverse or hazardous environments where equipment may be exposed to wet or dusty conditions, special consideration should be given to equipment vibration levels. This implies that the vibration levels of the equipment should be monitored and controlled to ensure its safe and efficient operation in such conditions. By doing so, the risk of equipment malfunction or failure due to excessive vibration can be minimized, thus promoting a safer working environment.

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  • 22. 

    Where The Provision and Use of Work Equipment Regulations 1998 states that equipment must be in an efficient state, the term ‘efficient’ is being used in the context of

    • A.

      Safety

    • B.

      Efficient use of power

    • C.

      Reliability

    • D.

      Ease of use

    Correct Answer
    A. Safety
    Explanation
    The term 'efficient' in the context of the Provision and Use of Work Equipment Regulations 1998 refers to the equipment being in a safe state. This means that the equipment should be functioning properly and not pose any risks or hazards to the users. The regulations aim to ensure that employers provide their workers with equipment that is safe to use and does not compromise their health and safety. Therefore, the term 'efficient' in this context emphasizes the importance of safety in relation to work equipment.

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  • 23. 

    Identify the non-statutory document which will be of assistance with portable appliance testing

    • A.

      EAWR

    • B.

      PUWER

    • C.

      IEE Code of Practice for in-service Inspection and Testing of Electrical Equipment

    • D.

      Memorandum of Guidance HSR 25

    Correct Answer
    A. EAWR
    Explanation
    The Electricity at Work Regulations (EAWR) is a non-statutory document that provides guidance and assistance with portable appliance testing. It outlines the legal requirements for maintaining electrical systems and equipment in the workplace, including the testing and inspection of portable appliances. The EAWR helps employers and employees understand their responsibilities and ensure the safety of electrical equipment. It is an important resource for those involved in portable appliance testing and compliance with electrical safety regulations.

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  • 24. 

    Identify one of the following that would not be covered under the scope of the Electricity at Work Regulations 1989

    • A.

      A hobbyist’s pillar drill in a domestic workshop

    • B.

      A 12 V d.c. hand vacuum in an office

    • C.

      An emergency re-chargeable torch and holder in a shop

    • D.

      A battery powered light in a fairground kiosk

    Correct Answer
    A. A hobbyist’s pillar drill in a domestic workshop
    Explanation
    The Electricity at Work Regulations 1989 cover the safety requirements for electrical equipment used in the workplace. The hobbyist's pillar drill in a domestic workshop would not be covered under the scope of these regulations because it is not being used in a workplace setting. The regulations only apply to equipment used in a work environment, such as offices, shops, and fairground kiosks.

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  • 25. 

    The person who’s responsibility is to ensure equipment is maintained in good order under The Provision and Use of Work Equipment Regulations 1998, is the

    • A.

      Employee

    • B.

      User

    • C.

      Self-employed contractor

    • D.

      The employer

    Correct Answer
    A. Employee
    Explanation
    The correct answer is "the employer." According to The Provision and Use of Work Equipment Regulations 1998, it is the employer's responsibility to ensure that equipment is maintained in good order. This includes conducting regular inspections, providing necessary repairs, and ensuring that employees are trained on how to properly use the equipment. The employer holds the ultimate responsibility for the safety and maintenance of the equipment used in the workplace.

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  • 26. 

    When inspecting and testing a fixed electrical appliance, you can seek guidance from

    • A.

      Approved Code of Practice L24

    • B.

      IET Guidance Note 3

    • C.

      Memorandum of Guidance HSR 25

    • D.

      BS 7671: Requirements for Electrical Installations

    Correct Answer
    A. Approved Code of Practice L24
    Explanation
    The Approved Code of Practice L24 provides guidance on the maintenance and testing of electrical appliances. It outlines the legal requirements and best practices for ensuring the safety of fixed electrical appliances. Therefore, it is a reliable source of guidance when inspecting and testing a fixed electrical appliance.

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  • 27. 

    The HSE document providing specific guidance on maintaining portable and transportable equipment is known as

    • A.

      GS3

    • B.

      GS 38

    • C.

      HSG 107

    • D.

      HSG 85

    Correct Answer
    A. GS3
    Explanation
    The correct answer is GS3. GS3 is a document provided by the HSE (Health and Safety Executive) that offers specific guidance on maintaining portable and transportable equipment. It is likely a reference document that outlines best practices and regulations for the safe and proper maintenance of such equipment.

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  • 28. 

    The Health and Safety at Work Act 1974, the Provision and Use of Work Equipment Regulations 1998 and the Electricity at Work Regulations 1989 apply to all electrical equipment

    • A.

      With a supply voltage of 230V or more

    • B.

      With a supply voltage of 400 kV or less

    • C.

      That is of a portable or fixed nature

    • D.

      Used in, or associated with, places of work

    Correct Answer
    A. With a supply voltage of 230V or more
    Explanation
    The Health and Safety at Work Act 1974, the Provision and Use of Work Equipment Regulations 1998, and the Electricity at Work Regulations 1989 apply to all electrical equipment with a supply voltage of 230V or more. This means that these regulations are applicable to any electrical equipment that operates at or above 230 volts. This ensures that safety measures and standards are in place for higher voltage electrical equipment used in workplaces.

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  • 29. 

    Regulation 5 of the Provision and Use of Work Equipment Regulations 1998 states that every employer shall ensure that work equipment is

    • A.

      Maintained in an efficient state, in efficient working order and in good repair

    • B.

      Not accessible to trainee employees

    • C.

      Checked daily by a supervisor

    • D.

      Stored in a locked storage facility when not in use

    Correct Answer
    A. Maintained in an efficient state, in efficient working order and in good repair
    Explanation
    Regulation 5 of the Provision and Use of Work Equipment Regulations 1998 requires employers to ensure that work equipment is kept in a proper condition. This means that the equipment should be maintained regularly to ensure that it is functioning efficiently and effectively. It should be in good repair and working order so that it does not pose any risks or hazards to employees. This regulation emphasizes the importance of keeping work equipment in a safe and suitable condition to protect the health and safety of workers.

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  • 30. 

    The Health and Safety at Work Act places a duty of care on both employer and employee to ensure the safety of

    • A.

      All persons using the work premises

    • B.

      Only trades persons using the work premises

    • C.

      Members of the public using the work premises

    • D.

      Only company personnel using the work premises

    Correct Answer
    A. All persons using the work premises
    Explanation
    The Health and Safety at Work Act places a duty of care on both employer and employee to ensure the safety of all persons using the work premises. This means that both the employer and employee have a responsibility to take necessary measures to prevent any harm or injury to anyone who is present in the work premises, regardless of whether they are employees, tradespersons, members of the public, or company personnel. This ensures that everyone's safety is prioritized and protected in the workplace.

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  • 31. 

    Which one of the following a.c. voltages, between conductors and earth, is the maximum value covered in the scope of IET Code of Practice for in-service Inspection and Testing of Electrical Equipment?

    • A.

      900 V a.c.

    • B.

      800 V a.c.

    • C.

      700 V a.c.

    • D.

      600 V a.c.

    Correct Answer
    A. 900 V a.c.
    Explanation
    The maximum value covered in the scope of IET Code of Practice for in-service Inspection and Testing of Electrical Equipment is 900 V a.c.

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  • 32. 

    Which one of the following is the main reason for In-service inspection and testing of equipment?

    • A.

      Determining whether maintenance is required

    • B.

      Keeping an up-to-date list of materials

    • C.

      Monitoring borrowed equipment

    • D.

      Ensuring the equipment is the latest edition

    Correct Answer
    A. Determining whether maintenance is required
    Explanation
    The main reason for in-service inspection and testing of equipment is to determine whether maintenance is required. This process helps identify any potential issues or defects in the equipment that may require maintenance or repair. By regularly inspecting and testing the equipment, any necessary maintenance can be identified and performed promptly, ensuring the equipment's optimal performance and safety. This helps prevent any potential failures or accidents that may occur due to faulty equipment.

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  • 33. 

    Which one of the following is detailed in L21 Approved Code of Practice published by the HSE?

    • A.

      Electricity at Work Regulations

    • B.

      Management of Health and Safety at Work

    • C.

      Workplace (Health, Safety and Welfare) Regulations

    • D.

      Provision and Use of Work Equipment

    Correct Answer
    A. Electricity at Work Regulations
    Explanation
    The L21 Approved Code of Practice published by the HSE provides detailed guidance on the Electricity at Work Regulations. This code of practice outlines the legal requirements and best practices for ensuring the safety of electrical systems and equipment in the workplace. It covers topics such as electrical installations, maintenance, testing, and inspection procedures to prevent electrical accidents and injuries.

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  • 34. 

    Which one of the following sections of the Health and Safety at Work Act, puts a duty of care on employees

    • A.

      1

    • B.

      2

    • C.

      6

    • D.

      7

    Correct Answer
    A. 1
    Explanation
    Section 1 of the Health and Safety at Work Act puts a duty of care on employees. This means that employees have a legal obligation to take reasonable care of their own health and safety, as well as the health and safety of others who may be affected by their actions or omissions in the workplace. This section emphasizes the importance of individual responsibility in maintaining a safe and healthy work environment.

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  • 35. 

    A more suitable unit for expressing the value 106Ω would be

    • A.

    • B.

    • C.

    • D.

      1000Ω

    Correct Answer
    A. MΩ
    Explanation
    The value 106Ω represents a very high resistance. To express this value more conveniently, it is more suitable to use a smaller unit such as milliohms (mΩ). This unit is equal to one thousandth of an ohm, making it a more appropriate choice for representing a resistance value in the range of 106Ω.

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  • 36. 

    The unit for better expressing 103Ω would be

    • A.

      KiΩ

    • B.

    • C.

      KvΩ

    • D.

    Correct Answer
    A. KiΩ
    Explanation
    The unit for better expressing 103Ω would be KiΩ, which stands for kilo-ohm. Kilo is a prefix that represents a factor of 1000, so kilo-ohm means 1000 ohms. Since 103Ω means 10^3 ohms, it is equivalent to 1 kilo-ohm. Therefore, KiΩ is the correct unit for expressing 103Ω.

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  • 37. 

    The term ‘milli-amps’ can be expressed as

    • A.

      MA

    • B.

      MiA

    • C.

      MA

    • D.

      Ma

    Correct Answer
    A. MA
    Explanation
    The term 'milli-amps' is a unit of measurement used to express electric current. It is commonly abbreviated as mA, which stands for milli-amperes. The other options (miA, MA, ma) are not correct abbreviations for milli-amps.

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  • 38. 

    It is recommended that an insulation resistance tester applies

    • A.

      A test current of 500 A

    • B.

      A test voltage of 500 V d.c.

    • C.

      A test resistance of 500 Ω

    • D.

      A test voltage of 500 V a.c.

    Correct Answer
    A. A test current of 500 A
    Explanation
    An insulation resistance tester applies a test current of 500 A because a higher test current helps to identify any faults or weaknesses in the insulation more effectively. By applying a higher current, the tester can generate a stronger electrical field, which can reveal any insulation breakdown or leakage. This allows for a more accurate assessment of the insulation's condition and helps to ensure the safety and reliability of the electrical system.

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  • 39. 

    An insulation resistance value is recorded as 1.12 MΩ. Another way of expressing this value is

    • A.

      1,120,000 Ω

    • B.

      1,120,000 mΩ

    • C.

      11,200 Ω

    • D.

      112,000 Ω

    Correct Answer
    A. 1,120,000 Ω
    Explanation
    The insulation resistance value of 1.12 MΩ can be expressed as 1,120,000 Ω because the prefix "M" represents mega, which is equal to 1,000,000. Therefore, multiplying 1.12 by 1,000,000 gives us 1,120,000.

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  • 40. 

    When using a low resistance ohmmeter for earth continuity testing, you would likely use

    • A.

      A test voltage of < 100mV

    • B.

      A resistance setting of 500 Ω

    • C.

      A test current of 100 mA

    • D.

      A test current of 100MA

    Correct Answer
    A. A test voltage of < 100mV
    Explanation
    When conducting an earth continuity test using a low resistance ohmmeter, it is important to use a low test voltage to avoid causing damage to sensitive equipment or circuits. A test voltage of less than 100mV is typically used for this purpose. The resistance setting of 500 Ω ensures that the ohmmeter is sensitive enough to accurately measure low resistance values. The test current of 100mA is suitable for detecting any faults or breaks in the earth continuity path.

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  • 41. 

    Extra-low voltage is defined as normally not exceeding

    • A.

      50 V d.c. or 120 V ripple-free a.c.

    • B.

      50 V a.c. or 120 V ripple-free d.c.

    • C.

      230 V a.c. or 120 V ripple-free d.c.

    • D.

      500 V a.c. or 120 V ripple-free d.c.

    Correct Answer
    A. 50 V d.c. or 120 V ripple-free a.c.
    Explanation
    Extra-low voltage is a term used to describe a voltage level that is typically safe for human contact. The given correct answer states that extra-low voltage does not normally exceed 50 V DC or 120 V ripple-free AC. This means that in electrical systems classified as extra-low voltage, the voltage level will not go beyond these limits. This is important to ensure the safety of individuals who may come into contact with the electrical equipment or wiring.

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  • 42. 

    The symbol used to represent a material's opposition to the flow of electric current is

    • A.

      UF

    • B.

      θ

    • C.

      W

    • D.

      Ω

    Correct Answer
    A. UF
    Explanation
    The symbol used to represent a material's opposition to the flow of electric current is Ω. The unit of electrical resistance is measured in ohms (Ω), which indicates how much a material resists the flow of current. The other options, uF, θ, and W, do not represent electrical resistance but rather represent other electrical quantities such as capacitance (uF), temperature (θ), and power (W).

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  • 43. 

    The symbol which represents a flow of current at a voltage of 230V is

    • A.

      W

    • B.

      Ω

    • C.

      A

    • D.

      KV

    Correct Answer
    A. W
    Explanation
    The symbol "W" represents electrical power, which is measured in watts. In this context, it signifies the flow of current at a voltage of 230V. The unit "watt" is commonly used to measure the rate at which electrical energy is transferred or consumed.

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  • 44. 

    Another way of expressing 1000 milliohms is

    • A.

      10 Ω

    • B.

      1 ohm

    • C.

      100 Ω

    • D.

      1000 ohms

    Correct Answer
    A. 10 Ω
    Explanation
    The correct answer is 10 Ω because 1000 milliohms is equivalent to 1 ohm, and since there are 1000 milliohms in 1 ohm, it can also be expressed as 10 Ω.

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  • 45. 

    4000m Ω =

    • A.

      40 Ω

    • B.

      400 Ω

    • C.

      4000 Ω

    • D.

      4 Ω

    Correct Answer
    A. 40 Ω
    Explanation
    The correct answer is 40 Ω because the unit "mΩ" stands for milliohm, which is equal to 0.001 Ω. Therefore, 4000mΩ is equal to 4 Ω, and since 4 Ω is not one of the options, the closest option is 40 Ω.

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  • 46. 

    The cross sectional area (csa) of a cable core is usually measured in

    • A.

      Mm2

    • B.

      Mm

    • C.

      M2

    • D.

      Cm

    Correct Answer
    A. Mm2
    Explanation
    The cross-sectional area (csa) of a cable core is usually measured in mm2 because it provides a more precise and accurate measurement. The use of millimeters squared allows for a more detailed understanding of the size and capacity of the cable core, especially in electrical and engineering applications where precision is crucial. Additionally, mm2 is a standard unit for measuring small areas, making it a widely accepted and recognized measurement in the field.

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  • 47. 

    The standard prefix for the SI unit of measure 106is

    • A.

      Kilo (k)

    • B.

      Mega (M)

    • C.

      Milli (m)

    • D.

      Deca (da)

    Correct Answer
    A. Kilo (k)
    Explanation
    The correct answer is kilo (k). In the SI unit system, the prefix "kilo" represents a factor of 10^3 or 1000. It is commonly used to denote a unit that is a thousand times larger than the base unit. For example, kilogram (kg) is a unit of mass that is equal to 1000 grams. Therefore, kilo is the appropriate prefix for the SI unit of measure 10^6.

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  • 48. 

    The standard prefix for the SI unit of measure 10-3is

    • A.

      Kilo (k)

    • B.

      Micro (μ)

    • C.

      Milli (m)

    • D.

      Deci (d)

    Correct Answer
    A. Kilo (k)
    Explanation
    The standard prefix for the SI unit of measure 10^-3 is milli (m). This prefix denotes a factor of one thousandth, which is equivalent to dividing the unit by 1000. The prefix kilo (k) represents a factor of one thousand, which is equivalent to multiplying the unit by 1000. Therefore, kilo (k) is not the correct prefix for 10^-3, but milli (m) is.

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  • 49. 

    The symbol μ ('mu')from the SI units of measure, can also be expressed as the value

    • A.

      10 to the power of -3

    • B.

      10 to the power of 6

    • C.

      10 to the power of 3

    • D.

      10 to the power of -6

    Correct Answer
    A. 10 to the power of -3
    Explanation
    The symbol μ (mu) represents the prefix "micro" in the SI units of measure. "Micro" denotes one millionth (1/1,000,000) or 10 to the power of -6. Therefore, the correct answer is 10 to the power of -6.

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  • 50. 

    Insulation resistance measurements are displayed in

    • A.

    • B.

    • C.

      Ω

    • D.

    Correct Answer
    A. MΩ
    Explanation
    Insulation resistance measurements are displayed in milliohms (mΩ). This unit is used to measure the resistance of insulation materials, such as wires or cables, to the flow of electrical current. Insulation resistance is an important parameter in electrical systems as it indicates the effectiveness of the insulation in preventing leakage current. By measuring the insulation resistance in milliohms, engineers and technicians can assess the quality and condition of the insulation and identify any potential issues or faults.

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  • Current Version
  • May 10, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 12, 2014
    Quiz Created by
    Julian
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