BS 7671 sample questions

BS 7671 Knowledge Test

Test your electrical knowledge and familiarity of BS 7671 with this new quiz.

We shall be adding new quizzes and questions in the near future so remember to check back regularly.

Share this quiz with your friends and colleagues, if this new quiz feature is popular we may add a leaderboard.

BS 7671 Knowledge Test

Test how familiar you are with BS 7671 2018 A2

BS 7671 page 68, Table 41.3

1 / 16

What is the maximum earth fault loop impedance (Zs) of a BS EN 60898 Type C 10 Amp MCB based on a maximum disconnection time of 0.4s?

2 / 16

What is the Correction Factor for cables in thermal insulation?

3 / 16

How would you regard BS 7671?

4 / 16

Which of the following offers overcurrent protection.

Arc Welders in general have a high inrush current.

5 / 16

Which curve type of MCB would be best suited for a 400V three phase Arc Welder?

BS 7671 regulation group 443.4 - Overvoltage Control, page 107.

6 / 16

For a domestic (dwelling) with an overhead line, what type of Surge Protection Device (SPD) is recommended at the origin of the installation?

BS 7671 regulation 544.1.1, page 205.

7 / 16

What is the maximum required CSA of a copper (Cu) Protective Bonding Conductor (which is not buried in the ground) on a TN-S earthing system?

BS 7671, page 64 regulation 411.3.2.2 and page 65 Table 41.1

8 / 16

What is the maximum disconnection time for a 16A 230V single phase radial final circuit suppling 13A socket-outlets on a TT earthing system?

9 / 16

A 32A, 30mA RCCB has an overcurrent protection rating of?

10 / 16

What does DNO stand for?

11 / 16

What is the maximum permissible earth fault loop impedance (Zs) of a BS EN 60947-2 63 Amp MCCB for a maximum disconnection time of 5s.

12 / 16

What does ADS stand for?

BS 7671, page 441, Table 4B2

13 / 16

Which is the Correction Factor (Rating Factor) for Ambient Ground Temperature?

BS 7671, page 442, Table 4B3

14 / 16

What does the Correction Factor Cs relate to?

15 / 16

What does PNB stand for?

BS 7671 page 443, Table 4C1

16 / 16

What is the Correction Factor Cg value for a group of 3 multicore-cables bunched in air, on a surface, embedded or enclosed?

Your score is

The average score is 67%

0%

If you’d like to suggest a question or report an incorrect answer please send it here.

To be notified of ongoing updates, news and future posts join our free Newsletter


Join Our Newsletter

Keep updated on new apps, updates and special promotions.

Newsletters are generally sent once a month.