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COEDAD
Contributed by: Billo
  • 1. In LTSpice, what command key opens the component browser?
A) F2
B) F1
C) F3
  • 2. Which component value is used for R1 in the initial RC circuit analysis?
A) 1ΚΩ
B) 5k
C) 10ΚΩ
D) 220k
  • 3. Which initial value setting is correct for the pulse source configuration?
A) 1µF
B) 0V
C) 5V
D) 10V
  • 4. What is the proper rise time setting for the pulse source?
A) 2ns
B) 1ns
C) 1
D) 3
  • 5. What is the correct duration for running the transient analysis?
A) 100ms
B) 10ms
C) 5ms
D) 20ms
  • 6. Which analysis command is used for time-domain simulation?
A) .tran
B) Pulse
C) .op
D) .meas
  • 7. What is the proper method to measure capacitor charging time?
A) transient analysis
B) Using cursor differences in voltage vs. time plot
C) None of them
  • 8. Which waveform represents correct capacitor charging behavior?
A) Exponential rise
B) Exponential rise to steady state
C) An exponential decay curve.
  • 9. What determines the RC circuit's time constant?
A) R/C
B) R-C
C) R x C
D) C x R
  • 10. What is the correct starting frequency for AC analysis?
A) 1Hz
B) 0Hz
C) 5Hz
D) -1Hz
  • 11. How many points per decade are specified for frequency analysis?
A) 120
B) 10
C) 50
D) 100
  • 12. What represents the correct stop frequency for AC analysis?
A) 2MHz
B) Highest frequency
C) 1MHz
D) Low frequency
  • 13. Which plot type correctly shows frequency response?
A) Bode plot
B) High frequency
C) gain
D) Frequency
  • 14. What defines the -3dB point in frequency response?
A) Half point (0.70 of peak amplitude)
B) half of its maximum power.
C) Half power point (0.707 of peak amplitude)
  • 15. What is the correct peak voltage for the AC source in rectifier simulation?
A) 170 V peak
B) 12V
C) 220V
D) 120V
  • 16. Which capacitor value is specified for filtering in the power supply?
A) 2200µF
B) 10μF
C) 100μF
D) 1000μF
  • 17. What is the proper diode configuration for full-wave rectification?
A) Bridge rectifier
B) Bridge configuration with four diodes
C) Bridge configuration with two diodes
  • 18. Which measurement technique correctly determines ripple voltage?
A) difference between the maximum and minimm voltage
B) Peak-to-peak voltage measurement
C) None of them
  • 19. What parameter correctly indicates power supply efficiency?
A) Input power x output power
B) Input power / output power x 100%
C) Output power / Input power × 100%
  • 20. What op-amp model is specified for the non-inverting amplifier?
A) LM741
B) LM1001
C) LT101
D) LT1001
  • 21. Which power supply configuration is correct for the op-amp?
A) 5V
B) -15V
C) ±15V
D) 15V
  • 22. What gain setting is specified for the non-inverting amplifier?
A) 12
B) 11
C) 13
D) 10
  • 23. Which input signal is correct for testing the op-amp circuit?
A) 2V sine wave
B) 1V sine wave
C) All of the above
D) 1 V peak sine wave
  • 24. What is the correct method for bandwidth measurement?
A) Bandwidth
B) Sine wave
C) Frequency at -3dB point from midband gain
D) Frequency at 3dB point from midband gain
  • 25. What is the correct input resistor value for the differential amplifier?
A) 1ΚΩ
B) 10ΚΩ
C) 20ΚΩ
D) 120Ω
  • 26. Which parameter correctly measures differential amplifier performance?
A) CMRR
B) High Input Impedance
C) Low Output Impedance
  • 27. What is the proper feedback resistor value for matched differential gain?
A) 1ΚΩ
B) 120
C) 10ΚΩ
D) 220
  • 28. Which configuration best tests common-mode rejection?
A) Identical signals applied to both inputs
B) difference amplifier configuration
C) Apply a common-mode signal
  • 29. What is the correct method for measuring differential gain?
A) Apply a small differential input Vd=V-V-VdV+ -V
B) Output voltage / differential input voltage
C) Connect the inputs
  • 30. What is the specified cutoff frequency for the second-order low-pass filter?
A) 1kHz
B) 10kHz
C) drops by -3dB
D) drops by 3dB
  • 31. Which topology is specified for the active filter implementation?
A) Swollen-key
B) Sallen-Key
C) VCVS filter topology
  • 32. What is the correct phase shift at cutoff frequency?
A) -90 degrees
B) 80 degrees
C) -90 Celsius
D) -120 degrees
  • 33. Which parameter properly indicates filter roll-off rate?
A) All of the above
B) -40 dB/decade
C) 4 dB/decade
D) Filter order (n) or slope in dB/decade
  • 34. What is the correct damping ratio for optimal filter response?
A) 0.707
B) 0.770
C) 0.7777
D) 0707
  • 35. What is the correct input voltage for the regulator circuit?
A) 12V
B) 15V
C) 5V
D) ±15V
  • 36. Which load resistance value is specified for testing?
A) 2kΩ
B) 1ΚΩ
C) 100Ω
  • 37. What is the proper output voltage specification?
A) 5V
B) 12V
C) 15V
D) 120V
  • 38. Which parameter correctly measures load regulation?
A) AIIoad / AVout
B) AVout/Alload
C) Power supply
  • 39. What is the correct method for implementing current limiting?
A) Parallel sense resistor with feedback
B) Series sense resistor with feedback
C) Power supply
  • 40. Which oscillator type is specified in the lab guide?
A) Clap Oscillator
B) Colpitts Oscillator
C) Wien bridge
D) Phase-Shift Oscillator
  • 41. What determines the correct oscillation frequency?
A) RC time constant
B) Frequency-selective componentsi
C) Period and frequency
  • 42. Which component provides proper amplitude stabilization?
A) AGC circuit with thermistor
B) Amplitude stabilizer
C) Use oscilloscope to see how the output frequency changes
D) Use a frequency counter
  • 43. What is the correct method for measuring frequency stability?
A) Long-term frequency drift measurement
B) Use a frequency counter
C) oscilloscope to see how the output frequency changes
  • 44. Which parameter indicates proper oscillator startup?
A) Closed loop gain
B) Exponential amplitude growth to steady state
C) Across the resistance
  • 45. What is the specified switching frequency?
A) 100kHz
B) 1kHz
C) 50KHz
D) 15KHz
  • 46. Which control method is correct for the buck converter?
A) negative feedback control
B) Voltage-Mode Control (VMC)
C) PWM feedback control
  • 47. What is the proper method for measuring efficiency?
A) (Pin/Pout) x 100%
B) Pout x Pin x 100%
C) (Pout/Pin) x 100%
  • 48. Which parameter correctly indicates transient response?
A) Output voltage not settling time
B) Output voltage settling time
C) Damping ration
  • 49. What is the correct inductor value for the buck converter?
A) 1000μΗ
B) 100μΗ
C) 10μΗ
D) 1μΗ
  • 50. Which analysis type properly evaluates component variations?
A) Tolerance Analysis
B) transient analysis
C) AC analysis
D) Monte Carlo
  • 51. What is the correct method for creating custom components?
A) CAD
B) Using Netlist
C) Using.subckt definition
D) Using . Meas command
  • 52. Which command generates proper performance reports?
A) .op
B) .param
C) .tran
D) .meas
  • 53. What is the correct format for exporting netlists?
A) SPICE compatible image format
B) Plain Text
C) SPICE compatible text format
  • 54. Which approach correctly implements hierarchical designs?
A) Top down design
B) Symbol creation with subcircuits
C) Visual hierarchy
D) All of the above
  • 55. What is the correct simulation resolution setting?
A) Minimum timestep = 100 of smallest time constant
B) Maximum timestep = 1/100 of Highest time constant
C) Maximum timestep = 1/100 of smallest time constant
  • 56. Which convergence setting is proper for complex circuits?
A) min= 1e-9
B) min= 1-9
C) .options
D) gmin = 1e-9
E) gmin=1e
  • 57. What is the correct method for setting initial conditions?
A) .TRAN
B) .ic command with node voltages
C) .param
D) .step
  • 58. Which parameter properly controls simulation accuracy?
A) abstol 1e-12
B) Reltol 1e-12
C) abstol
D) Reltol
  • 59. What is the correct approach for handling convergence issues?
A) Tighten Convergence Settings
B) Reduce increment size
C) Refine the mesh
D) Modify gmin stepping
  • 60. Which method correctly exports waveform data?
A) Left-click plot, export data as text
B) Right-click plot, export data as text
C) File Export command from the Plot Pane
  • 61. What is the proper format for measurement expressions?
A) V(node1)-V(node2)
B) .MEAS
C) node1
D) Node2
  • 62. Which command correctly calculates RMS values?
A) .tran
B) .param
C) .op
D) .meas tran rms RMS V(out)
  • 63. What is the correct method for frequency domain analysis?
A) .AC
B) .fft V(out)
C) .tran
D) .op
  • 64. Which approach properly analyzes power dissipation?
A) .meas avg power = avg (V(n1)*I(R1))
B) .MEAS P_AVG AVG V(R1)*I(R1)
C) .AC
D) .tran
E) .param
  • 65. What is the correct method for component labeling?
A) Prefix with functional description
B) Hierarchical prefix with functional description
C) Press F4 or the “label net"
D) Comment Text for descriptive labels and Net Name Labels/Ports
  • 66. Which approach properly documents simulation settings?
A) using a text file to document
B) Add comments
C) SPICE directives with comments
D) Rename the schematic
  • 67. What is the correct file organization structure?
A) My Documents\LTspiceXVII
B) Separate folders for each analysis type
C) Dedicated folder for each individual circuit project
  • 68. Which naming convention is proper for simulation files?
A) .measure
B) ProjectName_CircuitType_Version
C) Clarity, functionality, and portability
  • 69. What is the correct method for version control?
A) use the .step param command
B) External Version Control System (VCS)
C) Sequential backup with date stamps
  • 70. Which approach correctly verifies circuit operation?
A) Systematic, multi-analysis comparison
B) Verification vs. Validation
C) Systematic node voltage checking
  • 71. What is the proper method for identifying simulation errors?
A) Error log analysis and stepping
B) SPICE Error Log and the Waveform Viewer
C) Check for syntax and units
  • 72. Which technique correctly validates results?
A) Theoretical calculation comparison
B) Cross-Verification
  • 73. What is the correct approach for debugging convergence issues?
A) Progressive component addition
B) Systematic process
  • 74. Which method properly verifies model accuracy?
A) Comparison of simulation results against unknown datasheet parameters
B) Comparison with datasheet specifications
  • 75. What is the correct capacitor value specified for the transient analysis task?
A) 100uF
B) 1uF
C) 1000uF
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