Electronic Control And Digital Electronics Supplementary NCV Level 3 — Document
March 2020 — NCV Level 3 — Electronic Control And Digital Electronics Supplementary
NCV Level 3
2020
NCV Engineering
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Q1— Section header —
1.1.1Give THREE reasons why you would use a digital multimeter instead of an analogue multimeter. (3\
1.1.2Name TWO control pots that are used to position the trace on the screen of an oscilloscope. (2\
1.2.2.1 Make use of the formula 2n to calculate the maximum number of electrons on the third shell of an atom. (2\
1.2.2Explain the key processes of doping that changes semiconductor material to P type material. (4\
1.3Draw the EIC symbol o f a aractor diode. (2\
1.4Choose a description from COLUMN B that matches an item in COLUMN A. Write only the letter (A E\next to the question number (1.4.1
1.4.4\in the ANSWER BOOK. COLUMN A COLUMN B
1.4.4LED Tunnel di ode Zener diode Photo diode
1.5Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'Fa ls e' next to the question number (1.5.1
1.5.5\in the ANSWER BOOK.
1.5.1A transistor is biased by applying suitable voltages and currents to it to control its function.
1.5.2common base amplifier has a no current gain.
1.5.3Transistor s act as amplifier in the saturation mode.
1.5.4The commo n collector amplifier has an 180 phase shift between its input and output.
1.5.5
1.6Power supplies are made up of several stages of operation. Describe the function of the following stages.
1.6.1AC voltage transformation
1.6.2Rectification
1.6.3Filter
1.6.4Regulation
1.6.5
1.71. .1 Briefly d escribe the construction of a P channel, J FET.
1.8.1State THREE characteristics of an operational amp lifier integrated circuit (IC\ that makes it an ideal amplifier component in electronic circuits. (3\
1.8.2Draw the labelled circuit diagram of an inverting amplifier, using an operational amp lifier integrated circuit (IC\ (5\ [40]40
Q2— Section header —
2.1onvert between the following number systems:
2.1.163 to a b inary number
2.1.29F 16 to a d ecimal number
2.1.3
2.2BINARY ARITHMETIC
2.2.1
2.2.2
2.2.3
2.3.1What are TWO basic components or requirements of a digital counter? (2\
2.3.2Draw block circuit diagram of a 2 bit asynchronous up counter and also draw its timing diagram.
Q3— Section header —
3.1FIGURE 1
3.1.1Name the type of module that is mounted on a motherboard of a desktop co mputer. (1\
3.1.2What is the function of the module
Q3— Section header —
3.2After starting the computer, you find that the keyboard is not functioning. How would you troubleshoot to find the cau se? (3\
3.3What does the acronym POST with regard to compu ter start up, stand for? (1\
3.4You order ed a new desktop computer for a client and have to set up its four
Q4— Section header —
4.1Name THREE types of electrical transducers. (3\
4.2Choose the correct word or words from thos e given in brackets describing the capacitive transducer shown in FIGURE 2 . Write only the answer next to the question number (4.2.1
4.2.5\ the ANSWER BOOK. FIGURE 2
4.2.1The expanding instrument used in this capacitive device is called a (bellow s/Bourdon tube\
4.2.2As pressure enters t he system, the instrument (expands/contracts\.
4.2.3The effect between the fixed plate and movable plate changes the (area/distance\between the plates.
4.2.4The moving plate affects the (capacitance/inductance\between the plates.
4.2.5
4.3Explain how a p iezoelectric transducer is used as an audio microphone. (2\ [10]10
Q5— Section header —
5.1Name TWO input con trol devices that can be wired to a PLC's inputs. (2\
5.2Draw a ladder diagram that indicates a logic OR gate function of two input contacts A and B, that control an output relay M. Include a stop contact C. (4\
5.3Explain what is meant by the term latching or retaining when designing a ladder diagram. (4\ [10]10
Mark Allocation
Total100 marks
Sections40 + 25 + 15 + 10 + 10 = 100 marks
Paper information
TitleDocument
SubjectElectronic Control And Digital Electronics Supplementary
LevelNCV Level 3
Document typeQuestion paper
Year2020
MonthMarch
Pages6
Downloads4
Examination context
Decade2020s
Years ago6y
SeasonAutumn (SH)
Start daySunday
Exam periodMarch 2020
Days since exam2,417
About Electronic Control And Digital Electronics Supplementary examination preparation
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A practical revision approach
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