Question 1
In a balanced 3-phase AC distribution network with line-to-line voltage $U = 400\text{ V}$ (50 Hz), what is the line-to-neutral phase voltage $V$?
Correct Answer:
230 V (V = U / √3)
Question 2
Using Boucherot's method (méthode de Boucherot), how is total active power $P_T$ and total reactive power $Q_T$ calculated for an industrial electrical installation with $n$ parallel loads?
Correct Answer:
P_T = Σ P_i and Q_T = Σ Q_i, and total apparent power is S_T = √(P_T² + Q_T²)
Question 3
A 3-phase industrial load consumes an active power $P = 45\text{ kW}$ with a lagging power factor $\cos \varphi = 0.80$ when supplied by a $U = 400\text{ V}$ three-phase line. What is the line current $I$ drawn by the load?
Correct Answer:
81.2 A
Question 4
In the standard French/international low-voltage installation code (NFC 15-100 / IEC 60364), what is the maximum permissible percentage voltage drop (chute de tension $\Delta U$) between the origin of the installation and lighting circuits?
Correct Answer:
3% for lighting circuits (and 5% for other power/motor uses when fed from public low-voltage grid)
Question 5
What is the reactive power $Q_c$ required from a capacitor bank to improve the power factor of a factory drawing $P = 100\text{ kW}$ from $\cos \varphi_1 = 0.70$ ($\tan \varphi_1 = 1.020$) to $\cos \varphi_2 = 0.95$ ($\tan \varphi_2 = 0.329$)?
Correct Answer:
69.1 kvar
Question 1
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Prepare with the Cameroon Baccalauréat Série F3 Practice Questions - Cameroon Baccalauréat Technique Série F3 (Électrotechnique) Exam practice quiz. This question bank includes 100 questions covering text, phase, power, voltage, and motor. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Cameroon Baccalauréat Série F3 Practice Questions - Cameroon Baccalauréat Technique Série F3 (Électrotechnique) Exam

This practice set contains 100 questions from the matching question bank and focuses on text, phase, power, voltage, and motor. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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