30 real Electrical Standards & Regulations questions from the Electrical Design bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is IEC 60364?
Junior
A.US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
B.international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
C.central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
D.energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
2. Which term means: "international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment"?
A.IEC 60364 — US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
B.IEC 60364 — international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
C.IEC 60364 — Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations
D.IEC 60364 — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
5. Which term means: "Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations"?
A.IS 732 — energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
B.IS 732 — Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations
C.IS 732 — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
D.IS 732 — international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
A.IS 5572 / IEC 60079-10 classify Zone 0 continuous, Zone 1 likely in normal operation and Zone 2 unlikely and brief, dictating Ex d or Ex e equipment
B.Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
C.CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years
D.central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
8. Which term means: "Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956"?
A.CEA Safety Regulations 2023 — LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
B.CEA Safety Regulations 2023 — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
C.CEA Safety Regulations 2023 — IS 5572 / IEC 60079-10 classify Zone 0 continuous, Zone 1 likely in normal operation and Zone 2 unlikely and brief, dictating Ex d or Ex e equipment
D.CEA Safety Regulations 2023 — CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years
A.Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
B.CEA regulations define low voltage up to 250 V, medium up to 650 V, high up to 33 kV and extra-high above 33 kV
C.central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
D.Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations
11. Which term means: "central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role"?
A.Electricity Act 2003 — US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
B.Electricity Act 2003 — CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years
C.Electricity Act 2003 — international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
D.Electricity Act 2003 — central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
A.CEA regulations define low voltage up to 250 V, medium up to 650 V, high up to 33 kV and extra-high above 33 kV
B.central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
C.energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
D.international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
A.Voltage classification — CEA regulations define low voltage up to 250 V, medium up to 650 V, high up to 33 kV and extra-high above 33 kV
B.Voltage classification — US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
C.Voltage classification — central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
D.Voltage classification — CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years
17. Which term means: "LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)"?
A.IEC 60947 — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
B.IEC 60947 — international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
C.IEC 60947 — US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
D.IEC 60947 — LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
A.IS 5572 / IEC 60079-10 classify Zone 0 continuous, Zone 1 likely in normal operation and Zone 2 unlikely and brief, dictating Ex d or Ex e equipment
B.US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
C.international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
D.energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
20. Which term means: "energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses"?
A.ISO 50001 — CEA regulations define low voltage up to 250 V, medium up to 650 V, high up to 33 kV and extra-high above 33 kV
B.ISO 50001 — LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
C.ISO 50001 — energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
D.ISO 50001 — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
A.LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
B.international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
C.central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
D.US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
23. Which term means: "US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients"?
A.NEC continuous-load rule — Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations
B.NEC continuous-load rule — LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
C.NEC continuous-load rule — central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
D.NEC continuous-load rule — US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
A.US installation code (NFPA 70) sizes breakers and conductors at 125% of a load that runs three hours or more, met on projects with American clients
B.IS 5572 / IEC 60079-10 classify Zone 0 continuous, Zone 1 likely in normal operation and Zone 2 unlikely and brief, dictating Ex d or Ex e equipment
C.LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
D.international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment
26. Which term means: "IS 5572 / IEC 60079-10 classify Zone 0 continuous, Zone 1 likely in normal operation and Zone 2 unlikely and brief, dictating Ex d or Ex e equipment"?
A.Hazardous area zones — energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
B.Hazardous area zones — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
C.Hazardous area zones — CEA regulations define low voltage up to 250 V, medium up to 650 V, high up to 33 kV and extra-high above 33 kV
D.Hazardous area zones — IS 5572 / IEC 60079-10 classify Zone 0 continuous, Zone 1 likely in normal operation and Zone 2 unlikely and brief, dictating Ex d or Ex e equipment
29. Which term means: "CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years"?
A.Electrical Inspector approval — Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations that replaced the 2010 regulations, themselves successors of the IE Rules 1956
B.Electrical Inspector approval — CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years
C.Electrical Inspector approval — LV switchgear and controlgear standard; Part 2 for circuit breakers (Icu, Ics) and Part 4-1 for contactors and starters (AC-3 category)
D.Electrical Inspector approval — energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
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