This mock examination in Physics, Chemistry and Technology (PCT) was produced by Collège Libermann in Douala, one of Cameroon's most prestigious educational institutions, in preparation for the BEPC 2020 session. This paper stands out for its thematic richness and the diversity of skills assessed, offering Form 4 students superior quality preparation.

Part A, "Resource Assessment", contains two structured exercises. Exercise 1 tests fundamental knowledge: definitions of molecule and maintenance, formulae for calculating effort in a pulley system and the compression ratio of an internal combustion engine, statement of Lavoisier's law, description of energy production in a hydroelectric power station and the third stroke of a Diesel engine cycle, and a matching exercise covering plastics, alternating voltage, simple cross-section in technical drawing and petroleum fractions. Exercise 2 assesses practical skills through balancing the combustion equation of propane, a gear problem (transmission ratio, number of teeth), choosing and drawing a two-way switching circuit, dissolving barium nitrate with molar concentration calculations, and calculating the electrical resistance of a kettle.

Part B presents two complementary problem situations. The first concerns electrolysis of water: the student must explain why pure water does not conduct electric current and describe the necessary conditions, with an annotated diagram. The second situation features a construction site where simple machines must be proposed (fixed pulley, block and tackle, double-groove pulley, winch, inclined plane) to facilitate mortar transport, calculate the effort for each and determine the most advantageous solution.

The full answer key is provided, including all precise definitions, balanced equations, detailed calculations with numerical applications, diagrams and complete reasoning for the competency situations. This answer key serves as a particularly effective self-study resource.

This mock examination from Collège Libermann is highly recommended for any student preparing for the BEPC. It covers a remarkable range of topics: solution chemistry, simple machine mechanics, heat engines, electricity, technical drawing and petrochemistry, ensuring comprehensive revision of the PCT syllabus.