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<=CDACC ICT Technician Level 5 : Apply Basic Electronics past paper July 2023
Which of the following statements correctly describes the characteristic of a valence electron
A. They are highly mobile electrons
B. They do not take part in bonding
C. They exist in any electron shell in an atom
D. They determine the physical characteristics of an atom
A. They are highly mobile electrons
B. They do not take part in bonding
C. They exist in any electron shell in an atom
D. They determine the physical characteristics of an atom
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Questions List:
1. The deviation of resistance of a resistor is known as A. Inductance B. Resistivity C. Tolerance D. Ohms
2. An electrical component used to store electrical charge is E. Charger F. Adaptor G. Capacitor H. Logic gate
3. Copper and aluminum are examples of A. Conductors B. Insulators C. Semi-conductors D. Electricity
4. When a Semi-Conductor material is heated, its resistance ______ A. Decreases B. Increases C. Does not change D. Increases then Decreases
5. In which form does an inductor store energy A. Electric B. Electro-magnetic C. Magnetic D. Permittivity
6. The rate of change of energy is measured in A. Joules B. Henry C. Voltage D. Wattage
7. An electrical instrument used to measure the amount of current in an electrical circuit is called A. Amperes B. Potential difference C. Ammeter D. Coulombs
8. Which of the following is not a property of a wave A. Power B. Period C. Frequency D. Amplitude
9. The dielectric material used in a capacitor increases its ______ A. Permittivity B. Capacitance C. Farad D. Permeability
10. Which of the following types of memory is used for cache memory A. SDRAM B. DRAM C. SRAM D. CRAM
11. During a basic electronics practical class, a trainee was handed the component shown below. Identify the component. A. Fixed Resistor B. Fixed Inductor C. Variable Resistor D. Fixed Inductor
12. Which of the following statements correctly describes the characteristic of a valence electron A. They are highly mobile electrons B. They do not take part in bonding C. They exist in any electron shell in an atom D. They determine the physical characteristics of an atom
13. In modern computing, a packed BCD is preferred over unpacked BCD. What is the main reason for this preference A. Packed BCD is memory efficient B. Packed BCD is easily understood by the computer C. Unpacked BCD is outdated D. Unpacked BCD is ambiguous
14. A single transistor is used to implement _______ gate. A. NAND B. OR C. NOR D. NOT
15. Electrical quantities whose value varies in a non-continuous manner are referred to as A. Analogous B. Encapsulation C. Digital D. Frequencies
16. A capacitor is constructed using how many plates A. 1 B. 2 C. 3 D. 4
17. Name the instrument shown below: A. Ohmmeter B. Potentiometer C. Digital meter D. Voltmeter
18. Which of the following is the odd one out A. RAM B. ROM C. Cache D. Flash disk
19. The total number of electrons in an atom is known as A. Atomic radius B. Atomic number C. Atomic size D. Atomic weight
20. Which of the following is an active electrical component A. Transistor B. Capacitor C. Inductor D. Resistor
21. The measure of how difficult it is for current to pass through a material is known as resistance and it’s affected by many factors. List FOUR such factors.
22. RAM and ROM are primary memories of a computer. Outline FOUR differences between the two
23. Describe TWO types of biasing techniques used in a p-n junction
24. Draw a truth table of a NAND gate with two input variables
25. In number presentation, hexadecimal numbers are not preferably used. List THREE disadvantages of the hexadecimal numbers
26. The figure below shows a closed circuit of three inductors L1, L2 and L3 of 0.5H, 1H and 2H respectively Use it to answer the questions below a) Determine the equivalent inductance in the circuit b) Describe the flow of current in L1 and L3
27. Evaluate the following arithmetic giving your answer in binary: #152_8# -# 67_8 #
28. Determine current in a closed circuit having two resistors connected in series of values 10Ω and 15Ω respectively with an EMF of 4.5V
29. DVDs are gaining popularity more than CD-ROM’s. List FOUR advantages of a DVD over CD-ROM
30. State Ohm’s Law
31. List THREE factors that could necessitate the use of inductors in a circuit
32. Differentiate between power and energy as used in electronics
33. Determine the decimal equivalent of each of the following number systems. i.# FC7_16# ii. #1010 1101_2#
34. Determine resistance of a resistor having color code given below i. Green, violet, white, and gold ii. Yellow, violet, and silver
35. Explain THREE circumstances under which 2’s complement is used in a computer
36. Integrated Circuits are used commonly when developing electronic circuits. Explain THREE benefits of Integrated Circuits
37. With the aid of a diagram, describe the computer memory hierarchy
38. During a basic electronics lesson, the students were required to construct a simple electronic circuit. Describe the FOUR components they will use
39. Differentiate between doped semiconductors and un-doped semiconductors
40. Discuss any SIX challenges of emerging trends in electronic manufacturing
41. Silicon is mostly preferred over germanium in fabricating semiconductor electronic devices. Explain TWO main benefits of silicon over germanium
1. The deviation of resistance of a resistor is known as A. Inductance B. Resistivity C. Tolerance D. Ohms
2. An electrical component used to store electrical charge is E. Charger F. Adaptor G. Capacitor H. Logic gate
3. Copper and aluminum are examples of A. Conductors B. Insulators C. Semi-conductors D. Electricity
4. When a Semi-Conductor material is heated, its resistance ______ A. Decreases B. Increases C. Does not change D. Increases then Decreases
5. In which form does an inductor store energy A. Electric B. Electro-magnetic C. Magnetic D. Permittivity
6. The rate of change of energy is measured in A. Joules B. Henry C. Voltage D. Wattage
7. An electrical instrument used to measure the amount of current in an electrical circuit is called A. Amperes B. Potential difference C. Ammeter D. Coulombs
8. Which of the following is not a property of a wave A. Power B. Period C. Frequency D. Amplitude
9. The dielectric material used in a capacitor increases its ______ A. Permittivity B. Capacitance C. Farad D. Permeability
10. Which of the following types of memory is used for cache memory A. SDRAM B. DRAM C. SRAM D. CRAM
11. During a basic electronics practical class, a trainee was handed the component shown below. Identify the component. A. Fixed Resistor B. Fixed Inductor C. Variable Resistor D. Fixed Inductor
12. Which of the following statements correctly describes the characteristic of a valence electron A. They are highly mobile electrons B. They do not take part in bonding C. They exist in any electron shell in an atom D. They determine the physical characteristics of an atom
13. In modern computing, a packed BCD is preferred over unpacked BCD. What is the main reason for this preference A. Packed BCD is memory efficient B. Packed BCD is easily understood by the computer C. Unpacked BCD is outdated D. Unpacked BCD is ambiguous
14. A single transistor is used to implement _______ gate. A. NAND B. OR C. NOR D. NOT
15. Electrical quantities whose value varies in a non-continuous manner are referred to as A. Analogous B. Encapsulation C. Digital D. Frequencies
16. A capacitor is constructed using how many plates A. 1 B. 2 C. 3 D. 4
17. Name the instrument shown below: A. Ohmmeter B. Potentiometer C. Digital meter D. Voltmeter
18. Which of the following is the odd one out A. RAM B. ROM C. Cache D. Flash disk
19. The total number of electrons in an atom is known as A. Atomic radius B. Atomic number C. Atomic size D. Atomic weight
20. Which of the following is an active electrical component A. Transistor B. Capacitor C. Inductor D. Resistor
21. The measure of how difficult it is for current to pass through a material is known as resistance and it’s affected by many factors. List FOUR such factors.
22. RAM and ROM are primary memories of a computer. Outline FOUR differences between the two
23. Describe TWO types of biasing techniques used in a p-n junction
24. Draw a truth table of a NAND gate with two input variables
25. In number presentation, hexadecimal numbers are not preferably used. List THREE disadvantages of the hexadecimal numbers
26. The figure below shows a closed circuit of three inductors L1, L2 and L3 of 0.5H, 1H and 2H respectively Use it to answer the questions below a) Determine the equivalent inductance in the circuit b) Describe the flow of current in L1 and L3
27. Evaluate the following arithmetic giving your answer in binary: #152_8# -# 67_8 #
28. Determine current in a closed circuit having two resistors connected in series of values 10Ω and 15Ω respectively with an EMF of 4.5V
29. DVDs are gaining popularity more than CD-ROM’s. List FOUR advantages of a DVD over CD-ROM
30. State Ohm’s Law
31. List THREE factors that could necessitate the use of inductors in a circuit
32. Differentiate between power and energy as used in electronics
33. Determine the decimal equivalent of each of the following number systems. i.# FC7_16# ii. #1010 1101_2#
34. Determine resistance of a resistor having color code given below i. Green, violet, white, and gold ii. Yellow, violet, and silver
35. Explain THREE circumstances under which 2’s complement is used in a computer
36. Integrated Circuits are used commonly when developing electronic circuits. Explain THREE benefits of Integrated Circuits
37. With the aid of a diagram, describe the computer memory hierarchy
38. During a basic electronics lesson, the students were required to construct a simple electronic circuit. Describe the FOUR components they will use
39. Differentiate between doped semiconductors and un-doped semiconductors
40. Discuss any SIX challenges of emerging trends in electronic manufacturing
41. Silicon is mostly preferred over germanium in fabricating semiconductor electronic devices. Explain TWO main benefits of silicon over germanium
