Ordinary level 2026 North west regional mock electrical and electronic technology 2

Here is the data extracted from the images provided, organized by question and section.

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Question 1: FUNDAMENTALS OF ELECTRONICS

Context: Figures 1a and 1b indicate two symbols of transistor types used in transistorized ignition systems.

a- Name figures 1a and 1b. ($0.5 \text{ mark} \times 2 = 1 \text{ mark}$)

• Figure 1a (Left): [NPN Transistor]

• Figure 1b (Right): [PNP Transistor]

b- Give the function of the following electronic components and draw their symbols. ($6 \text{ marks}$)

Component	Function (1 mark×3)	Symbol (1 mark×3)
Thermistor
Phototransistor
Photodiode

c- What is the function of a DC converter used in hybrid electric vehicles? ($1 \text{ mark}$)

d- What is the meaning of ECU and its role in the engine management system of a vehicle? ($2 \text{ marks}$)

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Question 2: BATTERY

Context: Figure 2 shows parts of an exploded automobile battery.

a- State the main reason why car batteries are placed very close to the starter motor. ($1.5 \text{ marks}$)

b- Name the parts numbered 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. ($5 \text{ marks}$)

N°	Name (0.5 mark×5)	N°	Name (0.5 mark×5)
1		6
2		7
3		8
4		9
5		10

c- Elaborate in not more than three (03) lines, how to prepare the electrolyte of this battery. ($1.5 \text{ marks}$)

d- Cite two (02) advantages of the maintenance of free batteries over the classical battery. ($0.5 \text{ mark} \times 2 = 1 \text{ mark}$)

e- Identify these elements as found in the batteries: ($0.5 \text{ mark} \times 2 = 1 \text{ mark}$)

• $PbO_2$: ____________________

• $H_2SO_4$: ____________________

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Question 3: CHARGING SYSTEM

Context: Figure 3a is an exploded view of an alternator.

a- What is the function of the charging system in a motor vehicle? ($2 \text{ marks}$)

b- State two (02) factors that determine the alternator’s output. ($0.5 \text{ mark} \times 2 = 1 \text{ mark}$)

c- The alternator stator is usually coupled in star or delta windings.

• i) What advantage does a delta stator winding have over the star winding? ($1 \text{ mark}$)