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Q1— Section header —
1.1FIGURE 1 shows an RC transient circuit FIGURE 1
1.1.1Name the cycles between the points b d and d h respectively. (2\
1.1.2
1.1.3Briefly explain the transient changes occurring between points a and b e respectively. (2\
1.2A capacitor of unknown capacitance value is charged to a voltage V and then connected in series to a 20 mH inductor. If a 90 ohm resistor
Q2— Section header —
2.1FIGURE 2 Use the data obtained from the bridge circuit shown in FIGURE 2 to calculate the value of the unknown voltage V X: = R
2.2List the THREE major elements of an electronic instrumentation system. (3\ [12] (808018612
Q3— Section header —
3.1Give FOUR engineering related practical applications of ultrasonic energy. (4\
3.2List FOUR functions of the cutting fluid/slurry used in the applications stated
Q3— Section header —
3.3Choose a term from COLUMN B that matches a des cription in COLUMN A. Write the letter (A \ next to the question number (3.3.1
3.3.4\ in the ANSWER BOOK. COLUMN A COLUMN B
3.3.4Energy waves produced by the oscillation or acceleration of an electric charge Range/ rray of waves of extremely high fr equency and short wavelengths to
3.4Draw a neat, labelled circuit diagr am of a semiconductor detector. (6\
3.5Name TWO gas filled particle detectors. (2\ [20]20
Q4— Section header —
4.1Draw a neat, fully labelled block diagram of a metal detector. (4\
4.2.1Explain the operation of a basic metal detector circuit when no metal is detected within the vicinity of the detector. (4\
4.2.2Explain the operation of a basic metal detector circuit when metal is detected within the vicinity of the detector. (5\ [13] (808018613
Q5— Section header —
5.5\ in the ANSWER BOOK. COLUMN A COLUMN B
5.5rotection system applied to an electronic system whereby the operation of the system is dependent on the simultaneous fulfilment of all safety conditions rotection system applied to an electronic system whereby the operation of the system
Q6— Section header —
6.1.1List THREE characteristics ( not operating principles\ of a closed loop control system. (3\
6.1.2Indicate whether the statements are TRUE or FALSE by writing 'True' or 'Fa lse' next to the letter (a b\ in the ANSWER BOOK. (a A closed
6.2Name the specific type of controller gain for each of the damping types:
6.2.1Under damping
6.2.2Critical damping
6.2.3
6.3Draw a neat, labelled block diagram of a CAD/CAM system. (4\ [12]12
Q7— Section header —
7.1Indicate whether the statements are TRUE or FALSE by writing 'True' or 'False' next to the quest ion number (7.1.1
7.1.3\ in the ANSWER BOOK.
7.1.1Uncontrolled rectifier circuits use diodes and capacitors to effect power control.
7.1.2Fully controlled rectifier circuits use thyristors, diodes and capacitors to effect power control
7.1.3
7.2
7.3Give FIVE advantages of using DC motors for speed control with the exception of the wide range of wattage rating. (5\ [12]12
Q8— Section header —
8.1Draw a labelled ladder diagram of a logic gate that meets the criteria: Two inputs If the two inputs are at the same logic states the output is active. If the two inputs are at different logic states the output is in
8.2Name THREE necessary building blocks of a PLC. (3\ [10] TOTAL: 100 (808018610