AP ECET ELECTRONICS AND COMMUNICATION ENGINEERING (ECE) Multiple Choice Questions (MCQs)

AP ECET ECE - Electronic Measuring Instruments and Audio & Video Systems (Questions 31-45)

31. 1. The extension of range of an ammeter can be achieved by:
    A) Adding a parallel resistor
    B) Adding a series resistor
    C) Connecting the ammeter in series with a shunt
    D) Increasing the current capacity of the meter
    Answer: B
32. 2. The primary function of a FET voltmeter is to measure:
    A) Low-frequency signals
    B) High-frequency signals
    C) Low voltages with high impedance
    D) High voltages with low impedance
    Answer: C
33. 3. A differential voltmeter is used to measure:
    A) Voltage difference between two points in a circuit
    B) Current difference between two points
    C) Resistance between two points
    D) Power loss across a resistor
    Answer: A
34. 4. The principle behind a dual slope integration method in digital instruments is:
    A) Proportional to the frequency of the input signal
    B) Proportional to the time duration of the signal
    C) Integration of the input signal over a period of time
    D) Integration of the output signal over a period of time
    Answer: C
35. 5. Which of the following is a digital instrument used for measuring the frequency of signals?
    A) Digital frequency meter
    B) Digital voltmeter
    C) Digital ammeter
    D) Digital oscilloscope
    Answer: A
36. 6. The primary use of a Digital LCR meter is to measure:
    A) Inductance, Capacitance, and Resistance
    B) Voltage, Current, and Power
    C) Inductance and Capacitance only
    D) Frequency and Phase
    Answer: A
37. 7. In a Cathode Ray Oscilloscope (CRO), the function of the time base generator is to:
    A) Control the vertical deflection of the electron beam
    B) Control the horizontal deflection of the electron beam
    C) Supply the high voltage to the CRT
    D) Control the brightness of the CRT screen
    Answer: B
38. 8. The deflection sensitivity of a CRT in a CRO is defined as:
    A) The amount of deflection for a given input signal
    B) The total time for the sweep
    C) The voltage applied to the horizontal plate
    D) The rate of change of voltage
    Answer: A
39. 9. Triggered sweep circuits in a CRO are used to:
    A) Control the vertical deflection
    B) Trigger the oscilloscope display at specific times
    C) Adjust the frequency of the signal
    D) Control the brightness of the trace
    Answer: B
40. 10. The AF oscillator is used to generate signals in which frequency range?
    A) Low-frequency range
    B) High-frequency range
    C) Audio frequency range
    D) Radio frequency range
    Answer: C
41. 11. Which of the following instruments is used to measure the power in RF signals?
    A) Q meter
    B) RF power meter
    C) Digital frequency meter
    D) Distortion factor meter
    Answer: B
42. 12. A Q meter is primarily used to measure:
    A) Resistance
    B) Frequency of a signal
    C) Quality factor of coils and capacitors
    D) Power output
    Answer: C
43. 13. The purpose of a distortion factor meter is to measure:
    A) Harmonic distortion in a signal
    B) Voltage and current phase shift
    C) Frequency of the input signal
    D) Impedance of a circuit
    Answer: A
44. 14. Which of the following technologies is associated with Digital TV?
    A) LCD
    B) Plasma
    C) OLED
    D) HDTV
    Answer: D
45. 15. The main feature of a Touch Screen technology is:
    A) Ability to display 3D images
    B) Interactive control by touching the display
    C) Ability to adjust brightness automatically
    D) Ability to increase resolution
    Answer: B

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