Pat Testing Online Practice - Free (2014.1)
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
- 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 3Explanation
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.Rate this question:
-
- 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 defectExplanation
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.Rate this question:
-
- 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 monthsExplanation
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.Rate this question:
-
- 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 safetyExplanation
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.Rate this question:
-
- 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
B. MaintainedExplanation
Regulation 4(2) of the Electricity at Work Regulations states that all systems shall be maintained as may be necessary to prevent danger. This ensures that electrical systems are kept in a safe condition and function correctly, minimizing the risk of electrical hazards.Rate this question:
-
- 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 equipmentExplanation
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.Rate this question:
-
- 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 personExplanation
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.Rate this question:
-
- 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 personExplanation
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.Rate this question:
-
- 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 employerExplanation
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.Rate this question:
-
- 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
C. Suitable for the purpose for which it is used or providedExplanation
Regulation 4(1) requires that work equipment must be suitable for the specific purpose for which it is used or provided. This ensures that the equipment is appropriate for the intended tasks and minimizes risks associated with its use, enhancing safety and efficiency in the workplace.Rate this question:
-
- 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 injuryExplanation
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.Rate this question:
-
- 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
C. Persons to be competent to prevent danger and injuryExplanation
Regulation 10 of the Electricity at Work Regulations requires that all persons working on or near electrical systems must be competent to prevent danger and injury. This regulation ensures that only those with the necessary knowledge, skills, and experience perform tasks involving electrical equipment, thereby minimizing the risk of accidents and ensuring safety.Rate this question:
-
- 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 conductorsExplanation
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.Rate this question:
-
- 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
C. MaintainedExplanation
The Workplace (Health, Safety and Welfare) Regulations 1992 require that workplace equipment, devices, and systems are maintained in an efficient state, in efficient working order, and in good repair. This is to ensure the safety and health of employees and others in the workplace.Rate this question:
-
- 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
D. Regulation 4Explanation
Regulation 4 of the Electricity at Work Regulations stipulates that individuals must be competent to perform their duties safely and effectively. This ensures that only those with the necessary skills, knowledge, and experience handle electrical equipment, minimizing the risk of accidents and ensuring compliance with safety standards. Competence includes understanding the risks involved and the precautions to be taken, which is crucial for maintaining a safe working environment.Rate this question:
-
- 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
B. A user checkExplanation
A user check is a vital safety precaution where the person most familiar with the equipment performs a visual inspection to identify potential faults. This check helps ensure the equipment is functioning correctly and safely before use. The user is typically best positioned to recognize issues due to their regular interaction with the equipment, making this an effective first line of defense against malfunctions or safety hazards.Rate this question:
-
- 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 equipmentExplanation
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.Rate this question:
-
- 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. MaintainedExplanation
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.Rate this question:
-
- 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 workersExplanation
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.Rate this question:
-
- 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 safetyExplanation
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.Rate this question:
-
- 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 levelsExplanation
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.Rate this question:
-
- 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. SafetyExplanation
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.Rate this question:
-
- 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. EAWRExplanation
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.Rate this question:
-
- 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 workshopExplanation
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.Rate this question:
-
- 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. EmployeeExplanation
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.Rate this question:
-
- 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 L24Explanation
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.Rate this question:
-
- 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. GS3Explanation
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.Rate this question:
-
- 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 moreExplanation
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.Rate this question:
-
- 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 repairExplanation
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.Rate this question:
-
- 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 premisesExplanation
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.Rate this question:
-
- 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.Rate this question:
-
- 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 requiredExplanation
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.Rate this question:
-
- 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 RegulationsExplanation
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.Rate this question:
-
- 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. 1Explanation
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.Rate this question:
-
- 35.
A more suitable unit for expressing the value 106Ω would be
- A.
MΩ
- B.
KΩ
- C.
MΩ
- D.
1000Ω
Correct Answer
A. MΩExplanation
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.Rate this question:
-
- 36.
The unit for better expressing 103Ω would be
- A.
KiΩ
- B.
MΩ
- C.
KvΩ
- D.
KΩ
Correct Answer
A. KiΩExplanation
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.Rate this question:
-
- 37.
The term ‘milli-amps’ can be expressed as
- A.
MA
- B.
MiA
- C.
MA
- D.
Ma
Correct Answer
A. MAExplanation
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.Rate this question:
-
- 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 AExplanation
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.Rate this question:
-
- 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 ΩExplanation
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.Rate this question:
-
- 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 < 100mVExplanation
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.Rate this question:
-
- 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.Rate this question:
-
- 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. UFExplanation
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).Rate this question:
-
- 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. WExplanation
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.Rate this question:
-
- 44.
Another way of expressing 1000 milliohms is
- A.
10 Ω
- B.
1 ohm
- C.
100 Ω
- D.
1000 ohms
Correct Answer
A. 10 ΩExplanation
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.Rate this question:
-
- 45.
4000m Ω =
- A.
40 Ω
- B.
400 Ω
- C.
4000 Ω
- D.
4 Ω
Correct Answer
A. 40 ΩExplanation
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.Rate this question:
-
- 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. Mm2Explanation
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.Rate this question:
-
- 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.Rate this question:
-
- 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.Rate this question:
-
- 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 -3Explanation
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.Rate this question:
-
- 50.
Insulation resistance measurements are displayed in
- A.
MΩ
- B.
KΩ
- C.
Ω
- D.
MΩ
Correct Answer
A. MΩExplanation
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.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Aug 05, 2024Quiz Edited by
ProProfs Editorial Team -
Jul 12, 2014Quiz Created by
Julian
Back to top