30 Electrical Standards & Regulations questions from the Electrical Design bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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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
Answer + AI explanation with Pro
2. Which term means: "international standard for low-voltage electrical installations covering protection against shock, thermal effects, overcurrent and selection of equipment"?
Junior
A.Electricity Act 2003
B.IEC 60947
C.Voltage classification
D.IEC 60364
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
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
Answer + AI explanation with Pro
4. What is IS 732?
Junior
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.Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations
C.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.energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
Answer + AI explanation with Pro
5. Which term means: "Indian code of practice for electrical wiring installations, aligned to IEC 60364, covering design, selection and verification of LV installations"?
Junior
A.Voltage classification
B.NEC continuous-load rule
C.Hazardous area zones
D.IS 732
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
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
Answer + AI explanation with Pro
7. What is CEA Safety Regulations 2023?
Junior
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
Answer + AI explanation with Pro
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"?
Junior
A.Voltage classification
B.Electricity Act 2003
C.CEA Safety Regulations 2023
D.NEC continuous-load rule
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
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
Answer + AI explanation with Pro
10. What is Electricity Act 2003?
Junior
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
Answer + AI explanation with Pro
11. Which term means: "central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role"?
Junior
A.IEC 60947
B.Electricity Act 2003
C.CEA Safety Regulations 2023
D.Hazardous area zones
Answer + AI explanation with Pro
12. Which statement is correct?
Junior
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
Answer + AI explanation with Pro
13. What is Voltage classification?
Mid
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
Answer + AI explanation with Pro
14. Which term means: "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"?
Mid
A.IEC 60947
B.IS 732
C.Voltage classification
D.Electrical Inspector approval
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
16. What is IEC 60947?
Mid
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.energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
C.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.central act that created CEA, CERC and SERCs, introduced open access and licensing and gives Electrical Inspectors their statutory role
Answer + AI explanation with Pro
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)"?
Mid
A.Voltage classification
B.CEA Safety Regulations 2023
C.IEC 60947
D.Hazardous area zones
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
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)
Answer + AI explanation with Pro
19. What is ISO 50001?
Mid
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
Answer + AI explanation with Pro
20. Which term means: "energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses"?
Mid
A.IS 732
B.ISO 50001
C.CEA Safety Regulations 2023
D.NEC continuous-load rule
Answer + AI explanation with Pro
21. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
22. What is NEC continuous-load rule?
Mid
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
Answer + AI explanation with Pro
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"?
Mid
A.IEC 60947
B.ISO 50001
C.NEC continuous-load rule
D.IS 732
Answer + AI explanation with Pro
24. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
25. What is Hazardous area zones?
Senior
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
Answer + AI explanation with Pro
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"?
Senior
A.Hazardous area zones
B.CEA Safety Regulations 2023
C.NEC continuous-load rule
D.Electricity Act 2003
Answer + AI explanation with Pro
27. Which statement is correct?
Senior
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
Answer + AI explanation with Pro
28. What is Electrical Inspector approval?
Senior
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.energy management system standard using Plan-Do-Check-Act with an energy baseline, energy performance indicators and significant energy uses
C.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.CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years
Answer + AI explanation with Pro
29. Which term means: "CEA regulations require HV/EHV installations to be inspected and approved before energisation and periodically tested, typically every five years"?
Senior
A.IS 732
B.Electricity Act 2003
C.Electrical Inspector approval
D.Voltage classification
Answer + AI explanation with Pro
30. Which statement is correct?
Senior
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
Answer + AI explanation with Pro
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